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The Marshall Star for February 28, 2024


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The Marshall Star for February 28, 2024

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NASA Tech Contributes to Soft Moon Landing

For the first time in more than 50 years, new NASA science instruments and technology demonstrations are operating on the Moon following the first successful delivery of the agency’s CLPS (Commercial Lunar Payload Services) initiative.

Intuitive Machines’ Nova-C lander, called Odysseus, completed a seven-day journey to lunar orbit and executed procedures to softly land near Malapert A in the South Pole region of the Moon at 5:24 p.m. on Feb. 22. The mission marks the first commercial uncrewed landing on the Moon.

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On Feb. 22, Intuitive Machines’ Odysseus lunar lander captures a wide field of view image of Schomberger crater on the Moon approximately 125 miles uprange from the intended landing site, at approximately 6 miles altitude.
Credit: Intuitive Machines

NASA and Intuitive Machines co-hosted an afternoon news conference Feb. 28 from the agency’s Johnson Space Center. NASA+, NASA Television, and the agency’s website will provide updates.

Carrying six NASA science research and technology demonstrations, among other customer payloads, all NASA science instruments completed transit checkouts en route to the Moon. A NASA precision landing technology demonstration also provided critical last-minute assistance to ensure a soft landing. As part of NASA’s Artemis campaign, the lunar delivery is in the region where NASA will send astronauts to search for water and other lunar resources later this decade.

“For the first time in more than half a century, America returned to the Moon. Congratulations to Intuitive Machines for placing the lunar lander Odysseus carrying NASA scientific instruments to a place no person or machine has gone before, the lunar South Pole,” said NASA Administrator Bill Nelson. “This feat from Intuitive Machines, SpaceX, and NASA demonstrates the promise of American leadership in space and the power of commercial partnerships under NASA’s CLPS initiative. Further, this success opens the door for new voyages under Artemis to send astronauts to the Moon, then onward to Mars.” 

During the journey to the Moon, NASA instruments measured the quantity of cryogenic engine fuel as it has been used, and while descending toward the lunar surface, teams collected data on plume-surface interactions and tested precision landing technologies.

New lunar science, technology

NASA’s Navigation Doppler Lidar for Precise Velocity and Range Sensing (NDL) guidance system for descent and landing ultimately played a key role in aiding the successful landing. A few hours ahead of landing, Intuitive Machines encountered a sensor issue with their navigation system and leaned on NASA’s guidance system for an assist to precisely land. NASA’s instrument operates on the same principles of radar and uses pulses from a laser emitted through three optical telescopes. It measures speed, direction, and altitude with high precision during descent and touchdown.

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Experts from NASA and Intuitive Machines hosted a news conference Feb. 23 at NASA’s Johnson Space Center to discuss the soft landing of the company’s Nova-C lander, called Odysseus. Participants in the briefing included, from left, Steve Altemus, chief executive officer and co-founder, Intuitive Machines; Joel Kearns, deputy associate administrator for Exploration, Science Mission Directorate, NASA Headquarters; Tim Crain, chief technology officer and co-founder, Intuitive Machines; and Prasun Desai, deputy associate administrator, Space Technology Mission Directorate at NASA Headquarters.
Credit: NASA/Robert Markowitz

NASA instruments focused on investigating lunar surface interactions and radio astronomy. The Odysseus lander also carries a retroreflector array that will contribute to a network of location markers on the Moon for communication and navigation for future autonomous navigation technologies.

Additional NASA hardware aboard the lander includes:

  • Lunar Node 1 Navigation DemonstratorA small, CubeSat-sized experiment that will demonstrate autonomous navigation that could be used by future landers, surface infrastructure, and astronauts, digitally confirming their positions on the Moon relative to other spacecraft, ground stations, or rovers on the move. LN-1 was developed, built, and tested at NASA’s Marshall Space Flight Center.
  • Laser Retroreflector Array: A collection of eight retroreflectors that enable precision laser ranging, which is a measurement of the distance between the orbiting or landing spacecraft to the reflector on the lander. The array is a passive optical instrument and will function as a permanent location marker on the Moon for decades to come.   
  • Radio Frequency Mass Gauge: A technology demonstration that measures the amount of propellant in spacecraft tanks in a low-gravity space environment. Using sensor technology, the gauge will measure the amount of cryogenic propellant in Nova-C’s fuel and oxidizer tanks, providing data that could help predict fuel usage on future missions.   
  • Radio-wave Observations at the Lunar Surface of the Photoelectron Sheath: The instrument will observe the Moon’s surface environment in radio frequencies, to determine how natural and human-generated activity near the surface interacts with and could interfere with science conducted there.
  • Stereo Cameras for Lunar Plume-Surface Studies: A suite of four tiny cameras to capture imagery showing how the Moon’s surface changes from interactions with the spacecraft’s engine plume during and after descent.

NASA is committed to supporting its U.S. commercial vendors as they navigate the challenges of sending science and technology to the surface of the Moon.

“In daring to confront one of humanity’s greatest challenges, Intuitive Machines created an entire lunar program that has ventured farther than any American mission to land on the Moon in over 50 years,” said Steve Altemus, CEO of Intuitive Machines. “This humbling moment reminds us that pursuing the extraordinary requires both boldness and resilience.”

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Take 5 with Manil Maskey

By Wayne Smith

As a NASA senior research scientist, Manil Maskey supports the development of artificial intelligence technologies. What isn’t artificial is his drive to make a difference.

From a young age, Maskey has been fascinated with applied mathematics and solving problems. This led him to pursue fields where these skills could be applied, such as working at NASA. But while getting his undergraduate degree in math from Fairmont State University in West Virginia, Maskey was rejected for a NASA internship.

Manil Maskey, senior research scientist, project manager for NASA’s IMPACT project at the agency’s Marshall Space Flight Center, and a detailee at NASA Headquarters, talks Feb. 21 during the AI Symposium at the U.S. Space & Rocket Center in Huntsville.
Manil Maskey, senior research scientist, project manager for NASA’s IMPACT project at the agency’s Marshall Space Flight Center, and a detailee at NASA Headquarters, talks Feb. 21 during the AI Symposium at the U.S. Space & Rocket Center in Huntsville.
NASA/Jonathan Deal

“That lesson has been invaluable throughout my career,” said Maskey, the senior research scientist and project manager for the IMPACT (Interagency Implementation and Advanced Concepts Team) project in the Earth Science branch at NASA’s Marshall Space Flight Center. “That moment was a powerful motivator.”

After working in industry and academia, he sought a new challenge with NASA. Maskey said the agency’s commitment to pushing the frontiers of science and technology resonated with his own aspirations.

“I was fortunate to have a supportive mentor at NASA who had been encouraging me since my time as an academic researcher,” he said. “My mentor showed me the value of our expertise and work that aligned with NASA’s mission. I saw it as an excellent opportunity for me to utilize my mathematical and problem-solving skills to support those missions.”

In addition to his role at Marshall, Maskey is also on a detail to NASA Headquarters, where he is the data science and innovation lead in the Chief Science Data Office within the agency’s Science Mission Directorate.

“An element of my position is to encourage and support the development of collaborative AI projects,” Maskey said. “This involves bridging various divisions and teams across the Science Mission Directorate to fully leverage AI’s potential.”

He said his work is a combination of personal growth, impact, and the joy of sharing knowledge.

“What really motivates me is the desire for knowledge and the continuously evolving landscape of data science,” Maskey said. “Collaborating with other scientists, sharing knowledge, and working together on projects amplify my passion for continuous learning. I’m motivated by the potential to harness new tools and technologies to push the boundaries of what we can achieve in scientific research. This includes leveraging artificial intelligence, machine learning, and other cutting-edge technologies to solve problems more efficiently and effectively.”

Question: What are some of your primary responsibilities?

Maskey: At Marshall, I lead the development and deployment of cutting-edge data systems that facilitate interactive visualization, processing, and scalable analysis, enhancing our ability to understand and interpret science data for actionable insights. My work involves leading research and development efforts in data science tailored to the unique demands of the scientific community. This encompasses staying at the forefront of data science innovations and employing novel methodologies to address science challenges.

At NASA Headquarters, in addition to fostering collaborative AI projects, I am tasked with developing a comprehensive data science strategy for the SMD, aiming to integrate data science into our science missions. My other role is education and training of the SMD community in data science practices and methodologies, ensuring our teams are equipped with the knowledge and tools necessary for advancing our mission.

Question: What excites you most about your work within the Science Mission Directorate?

Maskey: The work we are doing at NASA, particularly within my team, excites me on multiple fronts. At the core of the opportunity is NASA’s Open Science Initiative. Our team is developing open science solutions that are inclusive, widely adopted, and enhancing the user experience to achieve scientific goals.

One of the most important aspects of my role is the ability to work across domains and science divisions. This cross-disciplinary approach is crucial for the future of science, where the integration of knowledge from different fields can lead to groundbreaking discoveries and advancements. It allows us to leverage the diverse expertise and perspectives within NASA, fostering innovation that no single team could achieve alone.

Manil Maskey stands next to a banner during White House Demo Day last November.
Manil Maskey stands next to a banner during White House Demo Day last November.
NASA/Courtesy of Manil Maskey

Maximizing the investments NASA has made in science missions is also a key part of my work. This means not only ensuring the success of these missions but also extending their impact through the application of data science, well beyond the life of the missions.

Finally, the prospect of helping to upscale the science community with the latest tools and technologies is incredibly motivating. It’s about empowering scientists with the capabilities they need to push the boundaries of what’s possible.

Question: What has been the proudest moment of your career and why?

Maskey: Choosing a single moment is difficult. Broadly speaking, these achievements fall into two primary categories: the success of my team and our impactful contributions at the convergence of data science innovations and scientific knowledge extraction.

Above all, the growth and success of individuals within our team represents some of the proudest moments in my career. Seeing many team members, some who began as students in my project, evolve into successful professionals within NASA and in the industry brings me the greatest satisfaction. Their growth is not merely a reflection of their hard work but also highlights the supportive and development-focused culture we’ve fostered. Each success story is a reminder of the powerful role mentorship and leadership play in shaping futures.

My role in pioneering data science initiatives, particularly in AI and machine learning within the Earth Science branch at Marshall, represents a significant career highlight. The inception and growth of these activities into a core component of our expertise and project portfolio mark a significant shift from our traditional role. The recognition of our work, both within NASA and by external communities, is a testament to the collective effort, innovation, and forward thinking. It symbolizes a shift in how we approach scientific inquiry, underscoring the critical role of data science in advancing our understanding of the Earth and beyond.

Question: What advice do you have for employees early in their NASA career or those in new leadership roles?

Maskey: Embarking on a career at NASA or stepping into a leadership role within this organization opens many potentials and opportunities for growth. My path to NASA was not straightforward. Early rejection from an internship taught me the invaluable lesson that setbacks are not roadblocks but steppingstones. Each challenge you face is an opportunity to learn, grow, and prove yourself. Embrace these challenges with a growth mindset. The desire for continuous improvement is crucial. Remain curious, and seek to learn from every experience. This passion for learning will not only fuel your personal growth but also enhance your contributions to your team and the broader NASA mission.

Collaboration is at the heart of NASA’s many achievements. Whether you’re just starting or stepping into a leadership role, actively seek to build inclusive, interdisciplinary teams where diverse perspectives are valued. Encourage open dialogue, share knowledge, and create an environment where everyone feels empowered to contribute their best.

Finally, remember the why behind your work. The projects and missions you contribute to at NASA have the potential to make significant impacts on our understanding of our planet, the universe, and beyond. Let this purpose drive you and guide your leadership.

Question: What do you enjoy doing with your time while away from work?

Maskey: Outside of work, I enjoy spending time with my family. I have a teenage son, who shares my passion for math and sports. Unlike me, he’s a talented soccer player and involved in competitive play. Supporting him in his soccer activities means we travel frequently, which turns into exciting adventures for our entire family, allowing us to discover new places. I also enjoy volunteering whenever possible. Whether it’s related to education, sports, or any other area where I can contribute, volunteering offers a sense of purpose outside of work.

Smith, a Media Fusion employee and the Marshall Star editor, supports the Marshall Office of Communications.

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Black History Month Profile: Joseph Gaines on Endurance

By Celine Smith

Joseph Gaines joined the U.S. Army Reserve while he was a student at the University of Memphis in Tennessee. But there was one hitch – as a reservist he was stationed in Mobile, Alabama, more than 350 miles away from the school.

So, each Sunday after Gaines finished his drills at 4 p.m., he made the six-plus hour commute from Mobile to Memphis to attend his 8 a.m. class the following Monday.

Joseph Gaines
Joseph Gaines is the manager of the Safety and Quality Assurance department at NASA’s Marshall Space Flight Center.
NASA/Danielle Burleson

“It was rough,” Gaines said, briefly laughing at the memory. “Of course, that was a lot of sacrifice.”

Gaines joined the Army Reserve to financially support his education. Gaines’ dedication to his education reflects the effort and work ethic still present with him after 34 years with NASA’s Marshall Space Flight Center. It’s also a reflection of the values his mother instilled in him.

“She’s my biggest influence,” Gaines said. “She was a single parent taking care of two boys, while attending night school and working a full-time job.”

Along with his mother, Gaines said his high school math teacher, Melton McMullan, had an immense influence on him. McMullan constantly told Gaines he had what it took to become an engineer after noticing his strength in the subject.

While Gaines majored in electrical engineering at the University of Memphis, he could not have imagined a career with NASA. “I was so enamored with NASA, but I didn’t even think I had the opportunity to work there,” Gaines said.

His stance changed in one day.

“I was a junior sitting in my power systems class,” Gaines said. “A senior walked in wearing a suit, so I asked him where he came from. He told me an interview and I asked with who. He said NASA and then told me where the interviewer was.”

Gaines left during the middle of class and headed for his dorm room. He changed clothes, grabbed his resume, found the interviewer, and got an interview. Two weeks later, he was juggling a NASA co-op role while also in the Army Reserve, all while completing his degree.

Thirty-four years later, Gaines is the manager of Marshall’s Safety and Quality Assurance Department. He ensures the continuous improvement of safety by overseeing industrial safety and pressure systems, along with quality assurance for the center and its contracted industrial activities.

 “I really enjoy making sure that Marshall has quality flight hardware and a safe work environment while doing so,” Gaines said.

His journey at Marshall began with Frank Nola, an esteemed engineer who taught him everything about circuits while he was in control systems during his co-op. “It was fascinating,” Gaines said. “I developed a lot of skills and confidence working with senior level engineers in my early career.”

After graduating in 1989, Gaines began as a technical engineer at Marshall. He developed control software for the Dynamic Solar Simulator, the RATT (Remote Automated Target Transporter), and a graphical user interface for an Advanced Video Guidance Sensor. He also designed control electronics for the RATT and Dynamic Solar Simulator.

“Early in my career, I worked in the Flight Robotics Lab,” Gaines said. “I absolutely loved that job! So much so, I saw myself retiring doing that type of work. Later on, I decided to develop my career in other skillsets. I found leadership roles just as rewarding and challenging as well.”

In 2008, Gaines became the deputy avionics and software lead for the Ares V heavy lift rocket. In 2011, he served as the avionics and software lead engineer for the SLS (Space Launch System) in support of the Spacecraft and Payload Integration Office. Gaines was the department lead engineer for the ECLSS (Environmental Control Life Support System) in 2012. He later became the senior integration lead for SLS secondary payloads safety in 2015.

Gaines served as the Quality Assurance (QA) branch chief in 2017. He was in communication with QA civil and contract engineers, ensuring all spaceflight hardware met quality requirements. In 2018, before becoming manager of the Safety and Quality Assurance department, he was the technical assistant there. He managed Marshall’s workmanship standards and electrostatic programs while being a representative for NASA’s Safety Culture Working Group.

Gaines lives in Harvest, Alabama, and has three adult children. His brother, Darryl Gaines, is the acting deputy for the Commercial Low Earth Orbit Development Program at NASA’s Johnson Space Flight Center.

Joseph Gaines was selected as the 121st U.S. Army Reserve Soldier of the Year in 1992.

“I think having a good work ethic, developing more than one skill, along with being a good communicator and detail oriented is needed to be successful,” he said. “Also learning from others as you branch out is very helpful.”

Second in a two-part series in the Marshall Star highlighting team members during Black History Month.

Smith, a Media Fusion employee, supports the Marshall Office of Communications.

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Combatting Organizational Silence Focus of Mission Success Forum; Tag Taglilatelo Receives Golden Eagle Award

By Wayne Smith

Bob Conway, deputy director of the NASA Safety Center, discussed organizational silence and how it relates to safety and mission success during a Shared Experiences Forum at the agency’s Marshall Space Flight Center on Feb. 22.

The theme of the forum was “The Impact of Breaking the Silence.” Conway discussed factors that can contribute to organizational silence, like failing to call attention to problems that can potentially result in mission failures. The hybrid event was part of the Mission Success is in Our Hands safety initiative and held in Activities Building 4316.

Bob Conway, deputy director of the NASA Safety Center, discusses organizational silence during a Shared Experiences Forum at the agency’s Marshall Space Flight Center on Feb. 22. The hybrid event was part of the Mission Success is in Our Hands safety initiative and held in Activities Building 4316.
Bob Conway, deputy director of the NASA Safety Center, discusses organizational silence during a Shared Experiences Forum at the agency’s Marshall Space Flight Center on Feb. 22. The hybrid event was part of the Mission Success is in Our Hands safety initiative and held in Activities Building 4316.
Credit: NASADanielle Burleson

Conway described organizational silence as a collective phenomenon of saying or doing little in response to perceived problems. He said organizations may verbalize openness but send conflicting signals to employees to keep quiet. Conway pointed to the space shuttle Challenger accident as an example of organizational silence.

“Are we allowing our folks to talk,” Conway said. “Are we hearing what they have to say, and are we putting it all in context?”

Conway said an organization’s culture has an impact on safety. He referenced the NASA Safety Reporting System as an internal method for anonymously reporting safety concerns.

Bob Conway talks during his presentation as Marshall team members look on in Activities Building 4316.
Bob Conway talks during his presentation as Marshall team members look on in Activities Building 4316.
NASA/Danielle Burleson

“An organizational excellence DNA is learning lessons from the past, applying it forward, and most importantly, speaking up when we have that,” Conway said. “The constant pursuit of excellence is what we always need to be doing. When you achieve excellence, safety and a lot of other things become effortless byproducts of it.”

Mission Success is in Our Hands is a safety initiative collaboration between Marshall and Jacobs Engineering. The goal is to help team members make meaningful connections between their jobs and the safety and success of NASA missions.

As part of the forum, Mission Success is in Our Hands presented its 39th Golden Eagle Award to Tag Taglilatelo of Jacobs Space Exploration Group. The award recognizes individuals who have contributed to flight safety and mission assurance above and beyond their normal work requirements.

Tag Taglilatelo, center, of Jacobs Space Exploration Group, displays the Golden Eagle Award that was presented to him during the Mission Success is in Our Hands forum. He is joined by Bill Hill, left, director of Safety and Mission Assurance at Marshall, and Jeff Haars, Jacobs vice president and program manager for Jacobs Space Exploration Group.
Tag Taglilatelo, center, of Jacobs Space Exploration Group, displays the Golden Eagle Award that was presented to him during the Mission Success is in Our Hands forum. He is joined by Bill Hill, left, director of Safety and Mission Assurance at Marshall, and Jeff Haars, Jacobs vice president and program manager for Jacobs Space Exploration Group.
NASA/Danielle Burleson

Bill Hill, director of Safety and Mission Assurance at Marshall, said Taglilatelo noticed an incorrect valve configuration that could have caused a hydrazine leak during an SLS (Space Launch System) booster test. As a result of his observation, the configuration was modified, leading to a safe test.

Management or peers can nominate any team member for the Golden Eagle Award. Honorees are typically recognized at quarterly Shared Experiences forums.

Smith, a Media Fusion employee and the Marshall Star editor, supports the Marshall Office of Communications.

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Listen to the Universe: New NASA Sonifications and Documentary

Three new sonifications of images from NASA’s Chandra X-ray Observatory and other telescopes have been released in conjunction with a new documentary about the project that makes its debut on the NASA+ streaming platform.

Sonification is the process of translating data into sounds. In the case of Chandra and other telescopes, scientific data are collected from space as digital signals that are commonly turned into visual imagery. The sonification project takes these data through another step of mapping the information into sound.

The new sonifications feature different objects observed by NASA telescopes.

The first is MSH 11-52, a supernova remnant blowing a spectacular cloud of energized particles resembling the shape of a human hand, seen in data from Chandra, NASA’s Imaging X-ray Polarimetry Explorer, or IXPE, and ground-based optical data.

M74 is a spiral galaxy like our Milky Way and this sonification combines data taken with NASA’s James Webb and Hubble Space Telescopes as well as X-rays from Chandra.

The third object in this new sonification trio is nicknamed the Jellyfish Nebula, also known as IC 443. These data include X-rays from Chandra and the now-retired German ROSAT mission as well as radio data from NSF’s Very Large Array and optical data from the Digitized Sky Survey.

The new documentary, “Listen to the Universe,” now available on NASA+ explores how these sonifications are created and profiles the team that makes them possible.

Started in 2020, the NASA sonification project built off of other Chandra projects aimed at reaching blind and visually-impaired audiences. It has since shown to be meaningful to that community but also impacts much wider audiences, finding listeners through traditional and social media around the world.

“We are so excited to partner with NASA+, along with her collaborators at SYSTEMS Sounds, to help tell the story about NASA’s sonification project,” said Kimberly Arcand, Chandra’s Visualization and Emerging Technology Scientist, who leads the sonification efforts. “It’s wonderful to see how this project has grown and reached so many people.”

NASA+ is the agency’s new streaming platform, delivering video and other content about NASA to the public whenever and wherever they want to access it. The on-demand streaming service is available to download on most major platforms via the NASA App on iOS and Android mobile and tablet devices, as well as streaming media players Roku and Apple TV.

“Sonifications add a new dimension to stunning space imagery, and make those images accessible to the blind and low-vision community for the first time,” said Liz Landau, who leads multimedia efforts for NASA’s Astrophysics Division at NASA Headquarters and oversaw production of the “Listen to the Universe” documentary. “I was honored to help tell the story of how Dr. Arcand and the System Sounds team make these unique sonic experiences and the broad impact those sonifications have had.”

More information about the NASA sonification project through Chandra, which is made in partnership with NASA’s Universe of Learning, can be found here.

NASA’s Marshall Space Flight Center manages the Chandra program. The Smithsonian Astrophysical Observatory’s Chandra X-ray Center controls science operations from Cambridge, Massachusetts, and flight operations from Burlington, Massachusetts.

NASA’s Universe of Learning materials are based upon work supported by NASA under cooperative agreement award number NNX16AC65A to the Space Telescope Science Institute, working in partnership with Caltech/IPAC, Center for Astrophysics | Harvard & Smithsonian, and the Jet Propulsion Laboratory.  

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NASA Sets Coverage for Agency’s SpaceX Crew-8 Launch, Docking

NASA will provide coverage of the upcoming prelaunch and launch activities for the agency’s SpaceX Crew-8 mission with astronauts to the International Space Station.

The launch is targeted for 11:04 p.m. CST, Feb. 29, from Launch Complex 39A at NASA’s Kennedy Space Center. The targeted docking time is about 6 a.m. on March 2.

(Left to right) Roscosmos Cosmonaut Alexander Grebenkin and NASA Astronauts Michael Barratt, Matthew Dominick, and Jeanette Epps pose for a photo during their Crew Equipment Interface Test at NASA’sa Kennedy Space Center in Florida. The goal of the training is to rehearse launch day activities and get a close look at the spacecraft that will take them to the International Space Station.
From left, Roscosmos Cosmonaut Alexander Grebenkin and NASA Astronauts Michael Barratt, Matthew Dominick, and Jeanette Epps pose for a photo during their Crew Equipment Interface Test at NASA’s Kennedy Space Center.
SpaceX

Crew arrival will be available on Kennedy’s streaming channels including YouTube and X. Coverage of launch, the postlaunch news conference, and docking will be available on NASA+, NASA Television, the NASA appYouTube, and the agency’s website. NASA also will host an audio-only post-Flight Readiness Review news teleconference. Learn how to stream NASA TV through a variety of platforms including social media.

The Crew-8 launch will carry NASA astronauts Matthew Dominick, Michael Barratt, and Jeanette Epps, as well as Roscosmos cosmonaut Alexander Grebenkin.

As part of the agency’s Commercial Crew Program, the mission marks the eighth crew rotation mission and the ninth human spaceflight mission for NASA to the space station supported by a SpaceX Dragon spacecraft since 2020. Endeavour is the name of this Dragon spacecraft.

A flag for Crew-8 was raised Feb. 28 at the HOSC (Huntsville Operation Support Center) at NASA’s Marshall Space Flight Center. The HOSC is a multi-mission facility that provides engineering and mission operations support for NASA’s Commercial Crew Program, Space Launch System rocket, Artemis lunar science missions, and science conducted on the space station. A Marshall team that is part of the agency’s Commercial Crew Program will be supporting Crew-8 launch operations from inside the HOSC.

The Payload Operations Integration Center within HOSC operates, plans, and coordinates the science experiments onboard the space station 365 days a year, 24 hours a day.

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Former Student Launch Competitor Turns Experience into NASA Engineering Career

By Jessica Barnett

Sometimes, all it takes is a few years and the right people to completely change a person’s career trajectory. One such example is Meredith Patterson, an aerospace engineer at NASA’s Marshall Space Flight Center, who went from knowing little to nothing about rockets to being part of the team that is working to put humans back on the Moon.

She credits her success in large part to NASA’s Student Launch, which not only helped her uncover her passion for aerospace engineering but gave her the knowledge and experience she needed to get where she is today.

A group of students in black t-shirts and red shorts pose around a student created rocket.
Meredith Patterson, front row, center right, poses with her teammates in the High-Powered Rocketry Club at North Carolina State University on the day they launched the rocket they built for NASA’s Student Launch in 2023. The experience and knowledge Patterson gained from her years participating in the annual competition helped pave the way for a career at NASA after graduation.
High-Powered Rocketry Club at North Carolina State

The annual Student Launch competition invites student teams from across the U.S. to spend nine months designing, building, and testing a high-powered rocket carrying a scientific or engineering payload. The hands-on, research-based engineering activity culminates each year in a final launch in Huntsville. This year’s challenge conclusion is set for April 10-14, with the final launch date set for April 13 at Bragg Farms in Toney, Alabama.

While Student Launch is open to students as young as sixth grade, Patterson was in her junior year of high school when she learned about the competition during a tour of North Carolina State University.

“When I walked into the rocketry lab there, I knew then, however many years it was going to take, I wanted to be the person who was able to run that and help put together everything for us to be successful in Student Launch,” Patterson said.

A college student works on a student created rocket with safety glasses on her face.
Patterson, then-freshman at North Carolina State University, assembles the competition vehicle used by the school’s high-powered rocketry club in this photo from the NASA’s Student Launch in 2019. Patterson was a member of the club and a regular participant in Student Launch for five years before graduating and turning her experience into a full-time career as an aerospace engineer at NASA.
High-Powered Rocketry Club at North Carolina State

She attended North Carolina State for five years, participating in each year’s Student Launch competition and leading the team to a fourth-place win during her final year. She received her Level I and Level II certifications from Tripoli Rocketry Association through Student Launch, and she was able to connect with mentors from Tripoli and the National Rocketry Association that helped her get the hands-on experience and technical know-how she believes are key to success in the aerospace industry.

“My leadership skills grew, my system engineering skills grew, and my technical writing skills grew,” Patterson said. “Having mentors through the competition allowed me to ask questions and learn on the technical side of things, too. I think I use more information from Student Launch day to day than from almost any of my classes in college.”

She said attending an engineering camp at 16 years old first unlocked her interest in spaceflight and rocketry, but it was through Student Launch that she got to really dive in and deepen her passion.

msfc-202300937.jpg?w=2048
Patterson, a former competitor in NASA’s Student Launch challenge, now works as an aerospace engineer at NASA’s Marshall Space Flight Center.
NASA / Danielle Burleson

“It’s crazy to think that less than 10 years ago, I had never even built a rocket, and now I can build Level II-sized rockets on my own and I’m actively working on the biggest solid rocket boosters in the world,” Patterson said. “Just in the past year, I’ve gone from the L-class motor that we used for Student Launch to casting 11-inch motors to now actively watching the casting of the SLS (Space Launch System) boosters.”

Student Launch is part of NASA’s Artemis Student ChallengesSeventy teams representing 24 states and Puerto Rico were selected to compete in the 2024 Student Launch Challenge.

Marshall hosts the Student Launch challenge with management support provided by NASA’s Office of STEM Engagement – Southeast Region. Funding is provided, in part, by NASA’s Space Operations Mission Directorate and NASA’s Next Gen STEM project.

Barnett, a Media Fusion employee, supports the Marshall Office of Communications.

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NASA’s Planetary Protection Team Conducts Vital Research for Deep Space Missions

By Celine Smith

As NASA continues its exploration of the solar system, including future crewed missions to Mars, experts in the agency’s Office of Planetary Protection are developing advanced tactics to prevent NASA expeditions from introducing biological contaminants to other worlds.

At NASA’s Marshall Space Flight Center, the Planetary Protection team is contributing to this work – pursuing new detection, cleaning, and decontamination methods that will protect alien biospheres, safeguard future planetary science missions, and prevent potentially hazardous microbes from being returned to Earth. The Planetary Protection team is a part of the Space Environmental Effects team in Marshall’s Materials and Processes Laboratory.

Planetary Protection microbiologist Chelsi Cassilly sits at a microscope in a white lab coat smiling at the camera.
Chelsi Cassilly, lead of Marshall Space Flight Center’s Planetary Protection Laboratory, researches microbes and their behaviors to preserve the environment of other planetary bodies after future missions.
NASA/Charles Beason

Planetary Protection microbiologist Chelsi Cassilly said much of Planetary Protection focuses on “bioburden,” which is typically considered the number of bacterial endospores (commonly referred to as “spores”) found on and in materials. Such materials can range from paints and coatings on robotic landers to solid propellants in solid rocket motors. NASA currently requires robotic missions to Mars meet strict bioburden limits and is assessing how to apply similar policies to future, crewed missions to the Red Planet.

“It’s impossible to eliminate microbes completely,” Cassily said. “But it’s our job to minimize bioburden, keeping the probability of contamination sufficiently low to protect the extraterrestrial environments we explore.”

Currently, Marshall’s Planetary Protection research supports NASA’s Mars Ascent Vehicle, a key component of the planned Mars Sample Return campaign, and risk-reduction efforts for the Human Landing System program.

Critically, Planetary Protection prevents the introduction of microbes from Earth onto planetary bodies where they might proliferate and interfere with scientific study of past or current life there. If Earth’s microbes were to contaminate samples collected on Mars or Europa, the scientific findings would be an inaccurate depiction of these environments, potentially precluding the ability to determine if life ever existed there. Preserving the scientific integrity of these missions is of the utmost importance to Cassilly and her team.

Contamination mitigation tactics used in the past also may not work with modern hardware and materials. For the Viking missions to Mars, NASA employed a total spacecraft HMR (heat microbial reduction) process, a prolonged exposure to high temperatures to kill off or minimize microbes. As spacecrafts advance, NASA is more discerning, using HMR for components and/or subassemblies instead of the entire spacecraft.

A Petri dish held by a gloved hand hosts several black circular spots of varying sizes and one flower shaped spot.
: This mold from the genus Cladosporium was collected from the surface of a cleanroom table at Marshall. This and other microbes within cleanrooms pose the biggest threat to spacecraft cleanliness and meeting Planetary Protection requirements.
Jacobs Engineering/Chelsi Cassilly

According to Cassilly, HMR may not always be an ideal solution because, extended time at high temperatures required to kill microbes can degrade the integrity of certain materials, potentially impacting mission success. While this is not a problem for all materials, there is still a need to expand NASA’s repertoire of acceptable microbial reduction techniques to include ones that may be more efficient and sustainable.

To contribute to NASA’s Planetary Protection efforts, Cassilly undertook a project – funded by a Jacobs Innovation Grant – to build a microbial library that could better inform and guide mitigation research. That meant visiting cleanrooms at Marshall to collect prevalent microbes, extracting DNA, amplifying specific genes, and submitting them for commercial sequencing. They identified 95% of the microbes within their library which is continually growing as more microbes are collected and identified.

The Planetary Protection team is interested in taking this work a step further by exposing their microbial library to space-like stressors – including ultraviolet light, ionizing radiation, temperature extremes, desiccation, and vacuum – to determine survivability.

“The research we’re doing probes at the possibility of using space itself to our advantage,” Cassilly said.

Cassilly and Marshall materials engineers also supported a study at Auburn University in Auburn, Alabama, to determine whether certain manufacturing processes effectively reduce bioburden. Funded by a NASA Research Opportunity in Space and Earth Sciences grant, the project assessed the antimicrobial activity of various additives and components used in solid rocket motor production. The team is currently revising a manuscript which should appear publicly in the coming months.

A gloved hand holds a Petri dish that appears to have a white specimen. It appears to look like a skull, spine, and hip bones in the photo that are all white.
This Bacillus isolate with striking morphology was collected from a sample of insulation commonly used in solid rocket motors. Cassilly studies these and other material-associated microbes to evaluate what could hitch a ride on spacecraft.
Jacobs Engineering/Chelsi Cassilly

Cassilly also supported research by Marshall’s Solid Propulsion and Pyrotechnic Devices Branch to assess estimates of microbial contamination associated with a variety of commonly used nonmetallic spacecraft materials. The results showed that nearly all the materials analyzed carry a lower microbial load than previously estimated – possibly decreasing the risk associated with sending these materials to sensitive locations.

Such findings benefit researchers across NASA who are also pursuing novel bioburden reduction tactics, Cassilly said, improving agencywide standards for identifying, measuring, and studying advanced planetary protection techniques.

“Collaboration unifies our efforts and makes it so much more possible to uncover new solutions than if we were all working individually,” she said.

NASA’s Office of Planetary Protection is part of the agency’s Office of Safety and Mission Assurance at NASA Headquarters. The Office of Planetary Protection oversees bioburden reduction research and development of advanced strategies for contamination mitigation at Marshall; NASA’s Jet Propulsion Laboratory; NASA’s Goddard Space Flight Center; and NASA’s Johnson Space Center.

Smith, a Media Fusion employee, supports the Marshall Office of Communications.

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I Am Artemis: Josh Whitehead

Launching a rocket to the Moon takes perseverance and diligence. Josh Whitehead – a world-class engineer, race-winning long-distance runner, and father – knows that it also takes a good attitude.

“Positive energies are vital, particularly when working through challenges,” Whitehead said. “Challenges are opportunities to learn and grow. There’s always more than one way; always more than one solution.”

NASA’s Josh Whitehead has a passion for systems engineering. He now helps lead the team developing the rocket that will fly the first crew to deep space since the Saturn V. The campaign name of Artemis, the Greek goddess of the Moon, also has special meaning for Whitehead. “I have a twin sister, and Artemis is the twin sister of Apollo. I'm like, hey, I'm a twin! How cool is that?”
NASA’s Josh Whitehead has a passion for systems engineering. He now helps lead the team developing the rocket that will fly the first crew to deep space since the Saturn V. The campaign name of Artemis, the Greek goddess of the Moon, also has special meaning for Whitehead. “I have a twin sister, and Artemis is the twin sister of Apollo. I’m like, hey, I’m a twin! How cool is that?”
NASA/Sam Lott

Whitehead’s job as the associate manager for the Stages Office of NASA’s SLS (Space Launch System) rocket supports design, development, certification, and operation of the 212-foot-tall SLS core stage. The massive core stage with two propellant tanks that collectively hold more than 733,000 gallons of super-cold propellant is one of the largest cryogenic propulsion rocket stages.

Whitehead joined the SLS Program, based at NASA’s Marshall Space Flight Center, early on during the COVID-19 pandemic. Complicating matters further, in June 2020, Whitehead was injured in a hit-and-run cycling accident so devastating that it separated his right shoulder and broke his back in three places.

Amid his necessary rehabilitation and surgeries, Whitehead learned to type left-handed and one-handed. Through it all, he was working to further the agency’s Artemis campaign and preparing for the first launch of the SLS rocket for Artemis I.

Now back to running and having participated in a local charity race every year since 2007, the avid runner and engineer will tell you that, like a recovery, the road to launch is not a sprint. It’s a cadenced effort as teams across the country worked toward a common goal. During his rehabilitation and path to run again, Whitehead and his team finished assembling the first SLS core stage and the successful eight-part Green Run test campaign of the entire stage at NASA’s Stennis Space Center prior to the Nov. 16, 2022, Artemis I launch.

Whitehead and his team are now manufacturing and processing core stages for multiple Artemis missions, including Artemis II in 2025, the first crewed flight under Artemis that will test the life-supporting systems in the Orion spacecraft ahead of future lunar missions.

Whitehead holds multiple advanced degrees in engineering from Auburn University and the University of Alabama in Huntsville. He got his start in the aerospace industry conducting subscale motor manufacturing tests for NASA’s Space Shuttle Program. From systems engineering supporting NASA’s Constellation Program and verifying and validating the solid rocket booster element in the SLS Program’s early days, to qualification activities and safety and mission assurance for the Artemis I flight, Whitehead has a passion for cross-discipline work.

“Being able to work systems engineering activities and multiple elements is all complementary,” he said. “But the common thread is it’s about the people, the process, and the product.”

SLS is part of NASA’s backbone for deep space exploration, along with the Orion spacecraft, advanced spacesuits and rovers, the Gateway in orbit around the Moon, and commercial human landing systems. SLS is the only rocket that can send Orion, astronauts, and supplies to the Moon in a single launch.

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NASA Conducts 7th in Series of RS-25 Engine Tests at Stennis

NASA conducted an RS-25 hot fire Feb. 23, moving one step closer to production of new engines that will help power the agency’s SLS (Space Launch System) rocket on future Artemis missions to the Moon and beyond.

The latest test at NASA’s Stennis Space Center began the second half of a 12-test RS-25 certification series on the Fred Haise Test Stand, following installation of a second production nozzle on the engine. The remaining hot fires are part of the second, and final, test series collecting data to certify an updated engine production process, using innovative manufacturing techniques, for lead engines contractor Aerojet Rocketdyne, an L3Harris Technologies company.

NASA conducted an RS-25 hot fire Feb. 23 test at NASA’s Stennis Space Center, beginning the second half of a 12-test RS-25 certification series on the Fred Haise Test Stand.

As NASA aims to establish a long-term presence on the Moon for scientific discovery and exploration, and prepare for future missions to Mars, new engines will incorporate dozens of improvements to make production more efficient and affordable while maintaining high performance and reliability.

Four RS-25 engines, along with a pair of solid rocket boosters, will launch NASA’s powerful SLS rocket, producing more than 8.8 million pounds of thrust at liftoff for Artemis  missions.

During the seventh test of the 12-test series, operators planned to fire the certification engine for 550 seconds and up to a 113% power level.

NASA’s Marshall Space Flight Center manages the SLS Program.

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      Marley Majetic, Pennsylvania State University

      Marley Majetic, Graduate Mentor
      Marley Majetic, graduate mentor for the 2024 SARP Hydroecology group, provides an introduction for each of the group members and shares behind-the scenes moments from the internship.
      Jordan DiPrima
      How are different land cover types affected by land subsidence on the U.S. Atlantic Coast?
      Jordan DiPrima
      Land subsidence is a frequently overlooked geologic hazard that is caused by natural processes and, more recently, anthropogenic stressors. The goal of this study is to observe subsidence trends and hotspots among land cover types on Virginia’s Eastern Shore and Long Island, New York. This study utilizes interferometric synthetic aperture radar, or InSAR, satellite data from Sentinel-1 to map vertical land motion from 2017 to 2023. Land cover data were sourced from Landsat 8 satellite imagery. Subsidence was mapped within the following land cover types on the Eastern Shore: urban, wetland, cropland, temperate or sub-polar grassland, temperate or sub-polar shrubland, mixed forest, and temperate or subpolar needleleaf forest. These land cover types have mean vertical velocities ranging from -0.2 mm/yr to -5.2 mm/yr. Results suggest that land subsidence is most severe in cropland areas on the Eastern Shore, with a mean vertical velocity of -5.2 mm/yr. In contrast, wetlands display the most subsidence on Long Island with a mean vertical velocity of -2.1 mm/yr. Long Island lacked distinct trends among land cover types and instead showed evidence of subsidence hotspots. These hotspots exist in the following land cover types: temperate or sub-polar grassland, barren lands, wetland, cropland, and temperate or sub-polar broadleaf deciduous forest. Overall, Eastern Shore croplands and Long Island wetlands were determined to be the most susceptible land cover types. These findings highlight regions at risk of sea level rise, flooding, and coastal erosion as a result of subsidence. With further research, we can map subsiding landscapes on a global scale to improve resource allocation and mitigation techniques.

      Isabelle Peterson
      Total Thermokarst Lake Changes on the Seward Peninsula, Alaska: 2016 to 2024
      Isabelle Peterson
      Thermokarst landscapes have and will continue to change as the arctic landscape warms due to climate change. Permafrost underlies much of these arctic landscapes, and as it melts, thermokarst landscapes are left behind. The Seward Peninsula in Alaska has an abundance of these landscapes, and thermokarst lakes are present in the northernmost portion. Several lakes have come and gone, but with increasing climate instability and warming of the area, there is a possibility of more permafrost melting, creating more of these lakes. To capture these changes, Harmonized Landsat Sentinel-2 (HLS) imagery were used to create annual lake maps of the northern portion of the Seward Peninsula from 2016 to 2024. Much of the methodology was informed from Jones et al. (2011); however, their study used eCognition, while the present study used ArcGIS Pro. This caused some differences in results likely due to the differences in software, satellite imagery, and the proposed study area. Lake number changes were observed annually. From this annual change, several 10 to 40 ha lakes disappeared and reappeared within the study period, along with smaller lakes filling in where larger lakes once were. Thermokarst lake drainage is a process described by Jones and Arp (2015) which has devastating geomorphological impacts on the surrounding area, creating large drainage troughs which diminish surrounding permafrost in a quick time frame. To capture these events and overall changes, satellite imagery is essential. This is especially true in remote regions which are hard to reach by foot and require flight missions to be scheduled over the area for aerial photography. However, LVIS and other higher resolution aerial instruments would provide higher accuracy when identifying smaller lakes, as satellite imagery does not accurately capture lakes below 1 ha in the study area. This assertion is made due to conflicting results compared to Jones et al (2011). While the methodologies of this study have been executed manually, Qin, Zhang, and Lu (2023) have proposed the idea of using Sentinel-2 imagery to map thermokarst lakes through automatic methods. While automatization has not yet been perfected, the potential is there and can be used to analyze thermokarst areas effectively. With more satellite imagery, annual, monthly, and potentially daily changes can be captured in favorable months to monitor changing landscapes in arctic regions. Thermokarst lakes have been changing, and monitoring them can help in the process of understanding the changing climate in arctic areas, especially through the lens melting permafrost.

      Emmanelle Cuasay
      Finding Refuge in Climate Crisis: Analyzing the Differences between Refugia and Non-Refugia in the Northern Philippines Using Remote Sensing
      Emmanelle Cuasay
      Refugia are areas that are characterized by stable environmental conditions that can act as a refuge for species as Earth’s climate warms. In this study, fourteen Harmonized Landsat Sentinel-2 images from February 2014 – March 2024 of the northern Philippines region were used. The region of interest is the terrestrial biome by Lake Taal. Normalized Difference Vegetation Index (NDVI) maps were created from all fourteen images to determine the NDVI 25th highest quartiles of the long-term average NDVI images and of a dry and wet year NDVI image. These values were then used to create refugia and non-refugia maps using ArcGIS Pro. Land cover data from Sentinel-2 and a digital elevation model (DEM), using the Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), were plotted in ArcGIS Pro to determine the slope and aspect of the area. Global Ecosystems Dynamics Investigation (GEDI) data were used to look at forest height of the study area, and the distribution of forest height, slope, aspect, and elevation were plotted to determine their probability densities in refugia and non-refugia areas. Results of this study show increased biomass in refugia areas. This suggests that conservation practices are crucial to aid in the preservation of biodiversity and biomass within these refugia areas.

      Jayce Crayne
      Site-Based Observations of a Saharan Dust Storm’s Impacts on Evapotranspiration in North-Central Florida
      Jayce Crayne
      Saharan dust storms serve an important role in the western Atlantic’s climate in their contribution to Earth’s radiation budget, modulating sea surface temperatures (SSTs), fertilizing ecosystems, and suppressing cloud and precipitation patterns (Yuan et al., 2020). However, Saharan dust storms are expected to become less frequent in this region as SSTs continue to rise (Yuan et al., 2020). Predicting the climate response to this change requires a keen understanding of how the presence of these storms affect evapotranspiration (ET) and its indicators. This study utilizes site-based observational data from an AmeriFlux tower near Gainesville, FL recorded during a large dust storm in late June 2020. The storm’s progression was documented using satellite imagery from Aqua and Terra and aerosol optical depth (AOD) measurements from an Aerosol Robotic Network (AERONET) station co-located with the AmeriFlux tower. Indicators of ET such as surface air temperature, vapor pressure deficit, photosynthetic photon flux density, and net radiation were analyzed. Findings were compared to modeled ET and latent energy flux reanalysis data provided by the Global Land Data Assimilation System (GLDAS). Both model simulations and on-site observations support that ET decreased during the days dust concentrations were heaviest and for a short time thereafter. Cloud cover data adopted from meteorological aerodrome reports (METARs) provided by an automated surface observing system (ASOS) located in Gainesville showed that clouds were not a major contributor in decreasing ET during the days of heaviest dust. The results of this study show a considerable decrease in ET as a result of dust aerosols. Further research is necessary to determine whether changes in ET due to Saharan dust storms are significant enough to alter climates in the western Atlantic and, if so, what the climate response will be if the frequency of storms decreases.

      Brandon Wilson
      Predicting 2025 and 2028 dNBR and dNDIV for Csarf Smith River Complex / Evaluating the Effects of 2019 California Wildfire Fund
      Brandon Wilson
      Biodiverse regions across California remain vulnerable to harmful wildfires year round. Quantifying and measuring these regions’ wildfire resilience is necessary for understanding where/how to allocate environmental resources. Several ecological wildfire studies have been conducted utilizing artificial intelligence and remote sensing to analyze and predict biodiversity damage across wildfire prone regions, including Northern Algeria and Arkansas, USA. The current case study aims to analyze biodiversity damage from the 2023 Csarf Smith River Complex Fire in Six Rivers National Forest, California and predict the difference in Normalized Burn Ratio (dNBR) and difference in Normalized Difference Vegetation Index (dNDVI) for 2025 and 2028 using remote-sensing-based random forest (RF) regression. Furthermore, to observe, holistically, a practical method California has implemented to address state-wide wildfire damage, the 2019 California Wildfire Fund (AB 1054 and AB 111) was evaluated using the synthetic control method (SCM). For this case study, remote sensing data from the United States Geological Survey (USGS) and NASA (Landsat 9 Satellite C2 L2, TerraClimate and the Land Data Assimilation System) were utilized for processing relevant spectral indexes for the RF. Data from NOAA, Energy Information Agency, International Monetary Fund and Bureau of Economic Analysis were utilized as synthetic control datasets to evaluate the effects of the 2019 California Wildfire Fund. Elevated topography in this study area is susceptible to high severity burn effects, while less elevated topography burns less. This result affected dNBR and dNDVI predictions as elevated areas seemingly did not have strong resilience to rampant burns. This demonstrates a direct correlation to potential lower transpiration rates for elevated areas, warranting further analysis. Results of low variance, post-treatment, between the treated unit and the synthetic control unit, poses concern for the positive effect of the 2019 Wildfire Fund.

      Carrie Hashimoto
      Describing changes in evapotranspiration following the 2020 Creek Fire in the southern Sierra Nevada
      Carrie Hashimoto
      Climatic warming and high tree density have caused larger and more severe wildfires to occur in western United States forests over time. Wildfires affect both the hydrology and ecology of forests via alterations to the water balance (e.g., evapotranspiration, streamflow, infiltration, and more) and could shift vegetation communities and subsequent ecosystem structure and function. This project explores ecological characteristics of a landscape that predict the extent to which the Creek Fire in the southern Sierra Nevada has affected evapotranspiration. Strides in understanding of consequential evapotranspiration changes can create pathways to address emerging forest health challenges posed by similar western fires. For analysis, various remote sensing and modeled data were collected from OpenET, the North American Land Data Assimilation System, TerraClimate, Harmonized LandSat Sentinel-2 data, and the Shuttle Radar Topography Mission. Multiple linear regression and generalized additive models were constructed. Relative change in evapotranspiration served as the response variable. Model covariates included average temperature, total precipitation in the preceding months, average soil moisture, elevation, slope, aspect, northness, latitude, pre-fire normalized difference vegetation index (NDVI), and post-fire change in normalized burn ratio (dNBR). Best subset selection with cross validation demonstrated minimization of cross-validation error with a 7-covariate model. This reduced model yields lower complexity and more interpretability while sustaining an adjusted R2 of 0.626, compared to the full model’s adjusted R2 of 0.663. A reduced generalized additive model (GAM) with interaction terms drawn from the linear model variable selection demonstrated an adjusted R2 of 0.695, indicating a better fit that comes at the cost of reduced interpretability and higher computational requirements than the linear models. The goal of this work is to disentangle environmental indicators of post-fire evapotranspiration change, such that predictive modeling of future wildfire impacts on evapotranspiration can be achieved.


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      Last Updated Nov 22, 2024 Related Terms
      General Explore More
      8 min read SARP East 2024 Ocean Remote Sensing Group
      Article 21 mins ago 10 min read SARP East 2024 Atmospheric Science Group
      Article 21 mins ago 11 min read SARP East 2024 Terrestrial Fluxes Group
      Article 22 mins ago View the full article
    • By NASA
      11 min read
      Preparations for Next Moonwalk Simulations Underway (and Underwater)
      Return to 2024 SARP Closeout Faculty Advisors:
      Dr. Lisa Haber, Virginia Commonwealth University
      Dr. Brandon Alveshere, Virginia Commonwealth University
      Dr. Chris Gough, Virginia Commonwealth University
      Graduate Mentor:
      Mindy Priddy, Virginia Commonwealth University

      Mindy Priddy, Graduate Mentor
      Mindy Priddy, graduate mentor for the 2024 SARP Terrestrial Fluxes group, provides an introduction for each of the group members and shares behind-the scenes moments from the internship.

      Angelina De La Torre
      Using NDVI as a Proxy for GPP to Predict Carbon Dioxide Fluxes
      Angelina De La Torre
      Climate change, driven primarily by greenhouse gases, poses a threat to the future of our planet. Among these gases is carbon dioxide (CO₂), which has a much longer atmospheric residence time compared to other greenhouse gases. One potential factor in reducing atmospheric CO₂ enrichment is plant productivity. Gross Primary Productivity (GPP) estimates the amount of CO₂ fixed during photosynthesis. The Normalized Difference Vegetation Index (NDVI) provides insight into the health of an ecosystem by measuring the density and greenness of vegetation. Therefore, it can be inferred that there is a relationship between NDVI and GPP, as greener plants are likely more productive. In this study, we used NDVI as a proxy for GPP and analyzed the effect NDVI had on CO₂ fluxes during California’s wet season between January and March 2023 in a restored tidal freshwater wetland. GPP and CO₂ flux data were obtained from the Dutch Slough AmeriFlux tower in Oakley, California. Landsat data were used to calculate the average NDVI. The influence of NDVI on GPP was assessed using linear regression. A second linear regression was then performed using NDVI and CO₂ flux, of which GPP is one component. We anticipate that wetlands with greater vegetation density will have lower CO₂ emissions.

      Because Landsat data scans in 16-day intervals, daily variation in NDVI could not be observed. This translates to a frequency discrepancy between the Landsat and AmeriFlux data, as AmeriFlux towers measure in half-hour intervals. Additionally, the wet season represented was limited by data availability, as the data before 2023 were unavailable. Despite data limitations in this study, the outlined process could be repeated in various wetland and climate classifications for further analysis of a larger sample size. This study could assist in developing strategies to increase CO₂ sequestration in an attempt to slow the effects of climate change.

      Samarth Jayadev
      Using Machine Learning to Assess Relationships between NDVI and Net Carbon Exchange During the COVID-19 Pandemic
      Samarth Jayadev
      Understanding the movement of carbon between Earth’s land surface and atmosphere is essential for ecosystem monitoring, creating climate change mitigation strategies, and assessing the carbon budget on national to global scales. Measures of greenness serve as indicators of processes such as photosynthesis that control carbon exchange and are vital in modeling of carbon fluxes. NASA’s Orbiting Carbon Observatory (OCO-2) provides high quality measurements of column-averaged CO₂ concentrations that can be used to derive net carbon exchange (NCE), a measure of CO₂ flux between terrestrial ecosystems and the atmosphere.
      From OCO-2, NCE data collected at the land nadir, land glint satellite position combined with in situ sampling can provide accurate measurements on a 1°x1° scale suitable for carbon flux characterization across the contiguous United States (CONUS). Normalized difference vegetation index (NDVI), which ranges from -1 to +1, measures the greenness of vegetation, serving as an indicator of plant density and health. This can help to understand ecosystem to carbon-cycle interactions and be leveraged for determining patterns with NCE. We examined the relationship between NDVI and NCE across CONUS during 2020 using Gradient Boosting Decision Trees (GBDT) which specialize in classifying and predicting non-linear relationships. This algorithm takes multiple weak learners (decision trees) and combines their predictions in an iterative ensemble method to improve prediction accuracy. Feature and permutation importance tests found that January and August (trough and peak NDVI, respectively) were the highest weighted predictor variables related to NCE. The dataset was split in a 90% training 10% test ratio across latitude/longitude grid cells to assess and verify model performance. Using the mean squared error loss function and hyperparameters with optimal estimators, tree depth, sample split, and learning rate the algorithm was able to converge the test predictions to match the deviance of the training data. The gradient boosting model can be applied to different months and years of NDVI/NCE to further explore these relationships or a multitude of research questions. Further studies should consider integrating land use and land cover change variables such as bare land and urbanization to improve predictions of NCE.

      Makai Ogoshi
      Deep-learning Derived Spaceborne Canopy Structural Metrics Predict Forest Carbon Fluxes
      Makai Ogoshi
      Terrestrial and airborne lidar data products describing canopy structure are potent predictors of forest carbon fluxes, but whether satellite data products produce similarly robust indicators of canopy structure is not known. The assessment of contemporary spaceborne lidar and other remote sensing data products as predictors of carbon fluxes is crucial to next generation instrument and data product design and large-spatial scale modeling. We investigated relationships between deciduous broadleaf forest canopy structure, derived from deep-learning models created with lidar data from GEDI and optical imagery from Sentinel-2, and forest carbon exchange. These included comparisons to in-situ continuous net ecosystem exchange (NEE), gross primary production (GPP), and net primary production (NPP). We find that the mean  canopy height from the gridded spaceborne product has a strong correlation with forest NPP, similar to prior analysis with ground-based lidar (portable canopy lidar; PCL). For comparison to NPP, heights taken from the gridded spaceborne product were compared by overlapping the product with nine terrestrial forest sites from the National Ecological Observatory Network (NEON). We used standard deviation of canopy height as a measure of canopy structural complexity. Complexity derived from the gridded spaceborne product does not show the same strong correlation with NPP as found when using PCL. Mean annual GPP and NEE across five years were compared to the gridded spaceborne product at six Fluxnet2015-tower sites with continuous, gap-filled carbon flux data. When compared to in-situ flux tower data, neither mean canopy height nor structural complexity strongly correlate to annual NEE or GPP. Primarily, the finding that derived spaceborne products exhibit a strong correlation between forest canopy height and NPP will advance global-scale application of forest-carbon flux predictions. Secondarily, a variety of limitations highlight shortcomings in the current terrestrial flux data network. A small number of available study sites, both spatially and temporally, and lack of resolution in vertical complexity of canopy structure both contribute to uncertainty in assessing the relationships to NEE and GPP.

      Sebastian Reed
      Porewater Methane Concentrations Vary Significantly Across A Freshwater Tidal Wetland
      Sebastian Reed
      Methane is a potent greenhouse gas that is over 80 times more powerful than CO₂ at trapping heat and accounts for an estimated 30% of global temperature rise associated with climate change. The largest natural source of methane worldwide is wetlands. Despite the role of methane in driving climate change, the magnitude of global annual wetland methane flux remains highly uncertain. This study analyzes the effects of greenness (assessed using Normalized Difference Vegetation Index; NDVI), plant species composition, rooting depth, atmospheric methane concentration, and plant longevity on porewater methane concentration at the Kimages Rice Rivers Center tidal freshwater wetland. Samples for atmospheric and porewater concentrations were conducted in situ in June 2024. For each sampling location (n = 23) we collected whole air samples (WAS) 2m above the marsh surface and porewater samples 5cm below the marsh surface. We visually assessed species composition at each sample location, with 12 species of wetland plants present overall. We used the TRY plant database to find the rooting depth, leaf nitrogen content, and lifespan of each species. Drone multispectral data from 2023 was used to estimate NDVI values. These variables were compared to the pore water methane concentration via stepwise linear regression. Leaf N content, NDVI, plant species, and WAS sampling did not show statistically significant correlation to porewater methane concentration. Rooting depth showed a slight positive correlation with porewater methane (alpha = 0.1, p = 0.08, R^2 = 0.1). Samples with only perennial plants (as opposed to annual plants) had a higher mean value of porewater methane (p = 0.1). Analyzing porewater methane provides insight as to what wetland components affect methanogenesis and methane release, which aids in assessing which plant functional traits are most responsible for driving or mitigating climate change. Results from this study and future research in this area has the potential to more accurately assess how methane cycles through wetlands to the atmosphere.

      Nohemi Rodarte
      Understanding the vertical profile of CO₂ concentration: How carbon dioxide levels change with altitude
      Nohemi Rodarte
      Carbon dioxide (CO₂) is one of the main greenhouse gasses that contribute to global warming.While the relationship between CO₂ concentrations and land cover types, such as forests and urban areas, is well documented, there is limited knowledge of how CO₂ concentrations vary with altitude at fine spatial scales. Guided by our hypothesis that CO₂ levels vary with altitude and increase with elevation, we used airborne data collected from the B200 aircraft, which flew at different altitudes (400 to 1200 feet) above the urban area of Hopewell, Virginia, between 9:40 AM and 10:40 AM. We analyzed the CO₂ concentrations recorded by the flight to obtain the median and range for each 100 feet of altitude. Our results reveal that carbon dioxide concentrations varied significantly across the range of altitudes investigated. Within the area studied, CO₂ concentrations were found to range between 410 and 470 ppm. The distribution of these concentrations along the altitude gradient shows a bimodal pattern, with notable peaks at altitudes of 700 to 800 feet and 1100 to 1200 feet. Although CO₂ levels were present at all measured altitudes, there was a noticeable drop in the mean concentration at 800 feet,which then stabilized until reaching 1,000 feet before rising again. This pattern indicates that the concentrations of this greenhouse gas are not uniformly distributed with altitude, but rather vary significantly, showing higher concentrations at certain elevations and lower concentrations at others. The CO₂ distribution fluctuates with altitude, showing higher or lower levels at specific heights rather than a smooth gradient, indicating that altitude impacts CO₂ concentrations. While we did not identify the drivers of this change, future studies could evaluate how factors such as surface emissions, atmospheric mixing, and local conditions may contribute to vertical CO₂ profiles, since the altitudes we considered in this research are within the troposphere.

      Camille Shaw
      Linking NDVI with CO₂ and CH₄ Fluxes: Insights into Vegetation and Urban Source-Sink Dynamics in the Great Dismal Swamp
      Camille Shaw
      In recent years, carbon dioxide, methane, and other greenhouse gases have gained attention because of their contribution to the rise in Earth’s global mean temperature. Methane and carbon dioxide have various sources and sinks, but an expanding array of sources have created a need to assess ongoing change in carbon balance. This study aims to quantify the relationship between Normalized Difference Vegetation Index, or NDVI, and methane and carbon dioxide fluxes. We measured carbon dioxide and methane concentrations within the boundary layer using the PICARRO instrument, focusing on the Great Dismal Swamp, a forested wetland, and surrounding areas in the Eastern Mid-Atlantic Region. Data collection occurred at various times of day and along different flight paths in 2016, 2017, and 2024, with each year representing data from a single season, either spring or fall, for temporal analysis. We calculated methane and carbon dioxide fluxes along the flight paths using airborne eddy covariance, a method for capturing accurate flux measurements while accounting for the mixing of gases in the boundary layer caused by heat. Additionally, we calculated NDVI for this area using NASA’s Landsat 8 and 9 satellite imagery. Analysis of the afternoon flight data revealed a negative linear correlation between NDVI and carbon dioxide flux. Urban areas, characterized by low NDVI, exhibit a positive carbon dioxide flux as a consequence of emissions from vehicles, while forested areas, with high NDVI, show a negative carbon dioxide flux because of photosynthesis. In contrast, methane flux shows minimal correlation with NDVI. The lack of correlation arises because forested wetlands, with high NDVI, emit substantial amounts of methane, while urban areas, despite having low NDVI, still produce significant methane emissions from landfills and industrial activities. Future research could further investigate how seasonal and diurnal variations influence the correlations between NDVI and greenhouse gases by collecting comprehensive data across all seasons within a given year and at various times of the day.

      Return to 2024 SARP Closeout Share
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      Last Updated Nov 22, 2024 Related Terms
      General Explore More
      8 min read SARP East 2024 Ocean Remote Sensing Group
      Article 21 mins ago 10 min read SARP East 2024 Atmospheric Science Group
      Article 21 mins ago 10 min read SARP East 2024 Hydroecology Group
      Article 21 mins ago View the full article
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