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From Polar Peaks to Celestial Heights: Christy Hansen’s Unique Path to Leading NASA’s Commercial Low Earth Orbit Development Program
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By NASA
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Preparations for Next Moonwalk Simulations Underway (and Underwater)
During the 21st Century Community Learning Centers workshop, after-school educators learn to build the “Move It” student activity from NASA’s Build, Launch and Recover Student Activity Guide.Credit: Kristen Marlatt NASA and the U.S. Department of Education are teaming up to engage students in science, technology, engineering, and math (STEM) education during after-school hours. The interagency program strives to reach approximately 1,000 middle school students in more than 60 sites across 10 states to join the program, 21st Century Community Learning Centers (CCLC).
Members of NASA Glenn Research Center’s Office of STEM Engagement traveled to Lansing, Michigan, last month to participate in a two-day professional development training with local after-school educators and facilitators. The training focused on integrating real-world STEM challenges into the 21st CCLC programs.
After-school educators engage in a student activity from NASA’s Build, Launch, and Recover Student Activity Guide. In this challenge, students become engineers and NASA crawler operators while working in teams to design and build a rubber band-powered model of NASA’s crawler-transporter that can carry the most mass possible the farthest distance without failure. Credit: Kristen Marlatt “By engaging in NASA learning opportunities, students are challenged to use critical thinking and creativity to solve real-world challenges that scientists and engineers may face,” said Darlene Walker, NASA Glenn’s Office of STEM Engagement director. “Through the 21st CCLC program, NASA and the Department of Education aim to inspire the next generation of explorers and innovators through high-quality educational content that ignites curiosity and fosters a joy of learning for students across the country.”
NASA Glenn education specialists will continue to provide NASA-related content and academic projects for students, in-person staff training, program support, and opportunities for students to engage with NASA scientists and engineers.
For more information on NASA Glenn’s STEM Engagement, visit https://www.nasa.gov/glenn-stem/
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By NASA
NASA’s Jet Propulsion Laboratory used radar data taken by ESA’s Sentinel-1A satellite before and after the 2015 eruption of the Calbuco volcano in Chile to create this inter-ferogram showing land deformation. The color bands west of the volcano indicate land sinking. NISAR will produce similar images.ESA/NASA/JPL-Caltech A SAR image — like ones NISAR will produce — shows land cover on Mount Okmok on Alaska’s Umnak Island . Created with data taken in August 2011 by NASA’s UAVSAR instrument, it is an example of polarimetry, which measures return waves’ orientation relative to that of transmitted signals.NASA/JPL-Caltech Data from NASA’s Magellan spacecraft, which launched in 1989, was used to create this image of Crater Isabella, a 108-mile-wide (175-kilometer-wide) impact crater on Venus’ surface. NISAR will use the same basic SAR principles to measure properties and characteristics of Earth’s solid surfaces.NASA/JPL-Caltech Set to launch within a few months, NISAR will use a technique called synthetic aperture radar to produce incredibly detailed maps of surface change on our planet.
When NASA and the Indian Space Research Organization’s (ISRO) new Earth satellite NISAR (NASA-ISRO Synthetic Aperture Radar) launches in coming months, it will capture images of Earth’s surface so detailed they will show how much small plots of land and ice are moving, down to fractions of an inch. Imaging nearly all of Earth’s solid surfaces twice every 12 days, it will see the flex of Earth’s crust before and after natural disasters such as earthquakes; it will monitor the motion of glaciers and ice sheets; and it will track ecosystem changes, including forest growth and deforestation.
The mission’s extraordinary capabilities come from the technique noted in its name: synthetic aperture radar, or SAR. Pioneered by NASA for use in space, SAR combines multiple measurements, taken as a radar flies overhead, to sharpen the scene below. It works like conventional radar, which uses microwaves to detect distant surfaces and objects, but steps up the data processing to reveal properties and characteristics at high resolution.
To get such detail without SAR, radar satellites would need antennas too enormous to launch, much less operate. At 39 feet (12 meters) wide when deployed, NISAR’s radar antenna reflector is as wide as a city bus is long. Yet it would have to be 12 miles (19 kilometers) in diameter for the mission’s L-band instrument, using traditional radar techniques, to image pixels of Earth down to 30 feet (10 meters) across.
Synthetic aperture radar “allows us to refine things very accurately,” said Charles Elachi, who led NASA spaceborne SAR missions before serving as director of NASA’s Jet Propulsion Laboratory in Southern California from 2001 to 2016. “The NISAR mission will open a whole new realm to learn about our planet as a dynamic system.”
Data from NASA’s Magellan spacecraft, which launched in 1989, was used to create this image of Crater Isabella, a 108-mile-wide (175-kilometer-wide) impact crater on Venus’ surface. NISAR will use the same basic SAR principles to measure properties and characteristics of Earth’s solid surfaces.NASA/JPL-Caltech How SAR Works
Elachi arrived at JPL in 1971 after graduating from Caltech, joining a group of engineers developing a radar to study Venus’ surface. Then, as now, radar’s allure was simple: It could collect measurements day and night and see through clouds. The team’s work led to the Magellan mission to Venus in 1989 and several NASA space shuttle radar missions.
An orbiting radar operates on the same principles as one tracking planes at an airport. The spaceborne antenna emits microwave pulses toward Earth. When the pulses hit something — a volcanic cone, for example — they scatter. The antenna receives those signals that echo back to the instrument, which measures their strength, change in frequency, how long they took to return, and if they bounced off of multiple surfaces, such as buildings.
This information can help detect the presence of an object or surface, its distance away, and its speed, but the resolution is too low to generate a clear picture. First conceived at Goodyear Aircraft Corp. in 1952, SAR addresses that issue.
“It’s a technique to create high-resolution images from a low-resolution system,” said Paul Rosen, NISAR’s project scientist at JPL.
As the radar travels, its antenna continuously transmits microwaves and receives echoes from the surface. Because the instrument is moving relative to Earth, there are slight changes in frequency in the return signals. Called the Doppler shift, it’s the same effect that causes a siren’s pitch to rise as a fire engine approaches then fall as it departs.
Computer processing of those signals is like a camera lens redirecting and focusing light to produce a sharp photograph. With SAR, the spacecraft’s path forms the “lens,” and the processing adjusts for the Doppler shifts, allowing the echoes to be aggregated into a single, focused image.
Using SAR
One type of SAR-based visualization is an interferogram, a composite of two images taken at separate times that reveals the differences by measuring the change in the delay of echoes. Though they may look like modern art to the untrained eye, the multicolor concentric bands of interferograms show how far land surfaces have moved: The closer the bands, the greater the motion. Seismologists use these visualizations to measure land deformation from earthquakes.
Another type of SAR analysis, called polarimetry, measures the vertical or horizontal orientation of return waves relative to that of transmitted signals. Waves bouncing off linear structures like buildings tend to return in the same orientation, while those bouncing off irregular features, like tree canopies, return in another orientation. By mapping the differences and the strength of the return signals, researchers can identify an area’s land cover, which is useful for studying deforestation and flooding.
Such analyses are examples of ways NISAR will help researchers better understand processes that affect billions of lives.
“This mission packs in a wide range of science toward a common goal of studying our changing planet and the impacts of natural hazards,” said Deepak Putrevu, co-lead of the ISRO science team at the Space Applications Centre in Ahmedabad, India.
Learn more about NISAR at:
https://nisar.jpl.nasa.gov
News Media Contacts
Andrew Wang / Jane J. Lee
Jet Propulsion Laboratory, Pasadena, Calif.
626-379-6874 / 818-354-0307
andrew.wang@jpl.nasa.gov / jane.j.lee@jpl.nasa.gov
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Last Updated Jan 21, 2025 Related Terms
NISAR (NASA-ISRO Synthetic Aperture Radar) Earth Earth Science Earth Science Division Jet Propulsion Laboratory Explore More
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By European Space Agency
Image: This Copernicus Sentinel-2 image captures the borders between North and South Dakota and Minnesota blanketed with snow and ice. View the full article
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By NASA
A Satellite for Optimal Control and Imaging (SOC-i) CubeSat awaits integration at Firefly’s Payload Processing Facility at Vandenberg Space Force Base, California on Thursday, June 6, 2024. SOC-i, along with several other CubeSats, will launch to space on an Alpha rocket during NASA’s Educational Launch of Nanosatellites (ELaNa) 43 mission as part of the agency’s CubeSat Launch Initiative and Firefly’s Venture-Class Launch Services Demonstration 2 contract.NASA NASA is collaborating with the U.S. Air Force and U.S. Space Force to offer a set of hands-on learning engagements that will help higher education institutions, faculty, and students learn more about what it takes to build small satellites and enhance the potential to be selected for flight opportunities.
Teams selected for the University Nanosatellite Program Mission Concept 2025 Summer Series will receive systems engineering training that prepares them for the industrial workforce while developing small satellite expertise at U.S. universities. The program, which runs from May through August 2025, also enhances students’ potential to be selected for flights to space as part of NASA’s CSLI (CubeSat Launch Initiative) and the U.S. Air Force University Nanosatellite Program.
“Part of NASA’s mission is to inspire the next generation,” said Liam Cheney, CSLI mission manager at the agency’s Kennedy Space Center in Florida. “The CubeSat Launch Initiative is providing opportunities for students and educators to experiment with technology and send their missions to space.”
The program allows faculty and students to form teams for the summer program without using university resources, and includes travel funding for kickoff, final event, and any in-person reviews, among other benefits.
All U.S colleges and universities are eligible, and teams at minority-serving institutions and Historically Black Colleges and Universities are strongly encouraged to apply for the Mission Concepts 2025 Summer Series in accordance with the criteria in the request for proposal. The solicitation opened on Jan. 6, with a deadline to apply by Monday, Feb. 3.
The agency’s collaboration with the U.S. Air Force and U.S. Space Force helps broaden access to space and strengthen the capabilities and knowledge of higher education institutions, faculty, and students.
NASA’s CubeSat Launch Initiative provides opportunities for CubeSats built by U.S. educational institutions, and non-profit organizations, including informal educational institutions such as museums and science centers to fly on upcoming launches. Through innovative technology partnerships NASA provides these CubeSat developers a low-cost pathway to conduct scientific investigations and technology demonstrations in space, thus enabling students, teachers, and faculty to obtain hands-on flight hardware design, development, and build experience.
For more information, visit: Solicitation – UNP
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By NASA
As part of NASA’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign, Firefly Aerospace’s Blue Ghost Mission One lander will carry 10 NASA science and technology instruments to the Moon’s near side. Credit: Firefly Aerospace Carrying NASA science and technology to the Moon as part of the agency’s CLPS (Commercial Lunar Payload Services) initiative and Artemis campaign, Firefly Aerospace’s Blue Ghost Mission 1 is targeting launch Wednesday, Jan. 15. The mission will lift off on a SpaceX’s Falcon 9 rocket from Launch Complex 39A at the agency’s Kennedy Space Center in Florida.
Live launch coverage will air on NASA+ with prelaunch events starting Monday, Jan. 13. Learn how to watch NASA content through a variety of platforms, including social media. Follow all events at:
https://www.nasa.gov/live/
After the launch, Firefly’s Blue Ghost lander will spend approximately 45 days in transit to the Moon before landing on the lunar surface in early March. The lander will carry 10 NASA science investigations to further our understanding of the Moon’s environment and help prepare for future human missions to the lunar surface, as part of the agency’s Moon to Mars exploration approach.
Science investigations on this flight aim to test and demonstrate lunar subsurface drilling technology, regolith sample collection capabilities, global navigation satellite system abilities, radiation tolerant computing, and lunar dust mitigation methods. The data captured could benefit humans on Earth by providing insights into how space weather and other cosmic forces impact Earth.
The deadline has passed for media accreditation for in-person coverage of this launch. The agency’s media accreditation policy is available online. More information about media accreditation is available by emailing: ksc-media-accreditat@mail.nasa.gov.
Full coverage of this mission is as follows (all times Eastern):
Monday, Jan. 13
2:30 p.m. – Lunar science media teleconference with the following participants:
Chris Culbert, CLPS program manager, NASA’s Johnson Space Center Maria Banks, CLPS project scientist, NASA Johnson Audio of the teleconference will stream live on the agency’s website:
https://www.nasa.gov/live/
Media may ask questions via phone only. For the dial-in number and passcode, please contact the Kennedy newsroom no later than 1:30 p.m. EST Jan. 13, at: ksc-newsroom@mail.nasa.gov.
Tuesday, Jan. 14
1 p.m. – Lunar delivery readiness media teleconference with the following participants:
Nicola Fox, associate administrator, Science Mission Directorate at NASA Headquarters Jason Kim, CEO, Firefly Aerospace Julianna Scheiman, director, NASA science missions, SpaceX Mark Burger, launch weather officer, Cape Canaveral Space Force Station’s 45th Weather Squadron Audio of the teleconference will stream live on the agency’s website:
https://www.nasa.gov/live/
Media may ask questions via phone only. For the dial-in number and passcode, please contact the Kennedy newsroom no later than 12 p.m. EST on Tuesday, Jan. 14, at: ksc-newsroom@mail.nasa.gov.
Wednesday, Jan. 15
12:30 a.m. – Launch coverage begins on NASA+ and the agency’s website.
1:11 a.m. – Launch
NASA Launch Coverage
Audio only of the media teleconferences and launch coverage will be carried on the NASA “V” circuits, which may be accessed by dialing 321-867-1220, -1240, or -7135. On launch day, the full mission broadcast can be heard on -1220 and -1240, while the countdown net only can be heard on -7135 beginning approximately one hour before the mission broadcast begins.
On launch day, a “tech feed” of the launch without NASA TV commentary will be carried on the NASA TV media channel.
NASA Website Launch Coverage
Launch day coverage of the mission will be available on the NASA website. Coverage will include live streaming and blog updates beginning no earlier than 12:30 a.m. EST Jan. 15, as the countdown milestones occur. On-demand streaming video and photos of the launch will be available shortly after liftoff. For questions about countdown coverage, contact the Kennedy newsroom at 321-867-2468. Follow countdown coverage on our launch blog for updates.
NASA Virtual Guests for Launch
Members of the public can register to attend this launch virtually. Registrants will receive mission updates and activities by email, including curated mission resources, schedule updates, and a virtual guest passport stamp following a successful launch. Print your passport and get ready to add your stamp!
Watch, Engage on Social Media
Let people know you’re following the mission on X, Facebook, and Instagram by using the hashtag #Artemis. You can also stay connected by following and tagging these accounts:
X: @NASA, @NASAKennedy, @NASAArtemis, @NASAMoon
Facebook: NASA, NASAKennedy, NASAArtemis
Instagram: @NASA, @NASAKennedy, @NASAArtemis
Coverage en Español
Did you know NASA has a Spanish section called NASA en español? Check out NASA en español on X, Instagram, Facebook, and YouTube for additional mission coverage.
Para obtener información sobre cobertura en español en el Centro Espacial Kennedy o si desea solicitar entrevistas en español, comuníquese con Antonia Jaramillo o Messod Bendayan a: antonia.jaramillobotero@nasa.gov o messod.c.bendayan@nasa.gov.
For media inquiries relating to the launch provider, please contact SpaceX’s communications department by emailing: media@spacex.com. For media inquiries relating to the CLPS provider, Firefly Aerospace, please contact Firefly’s communication department by emailing: press@fireflyspace.com.
For more information about the agency’s CLPS initiative, see:
https://www.nasa.gov/clps
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Karen Fox / Alise Fisher
Headquarters, Washington
301-286-6284 / 202-358-1275
karen.c.fox@nasa.gov / alise.m.fisher@nasa.gov
Natalia Riusech
Johnson Space Center, Houston
281-483-5111
nataila.s.riusech@nasa.gov
Antonia Jaramillo
Kennedy Space Center, Florida
321-501-8425
antonia.jaramillobotero@nasa.gov
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