Members Can Post Anonymously On This Site
Space Force publishes 2025 Data, AI strategic action plan
-
Similar Topics
-
By NASA
Explore This Section Earth Home Earth Observer Home Editor’s Corner Feature Articles Meeting Summaries News Science in the News Calendars In Memoriam More Archives 11 min read
The Earth Observer Editor’s Corner: January–March 2025
NASA’s Earth Observing fleet continues to age gracefully. While several new missions have joined the fleet in the past year, scientists and engineers work to extend the life of existing missions and maximize their science along the way. The crowning example is the first Earth Observing System (EOS) Flagship mission, Terra, which celebrated a quarter-century in orbit on December 18, 2024.
Terra, continues to collect daily morning Earth observations using five different instruments: Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Clouds and the Earth’s Radiant Energy System (CERES), Multi-angle Imaging SpectroRadiometer (MISR), Moderate Resolution Imaging Spectroradiometer (MODIS), and Measurement of Pollution in the Troposphere (MOPITT). Collectively, these observations have established a robust satellite record of global scientific processes to track changes in temperature, glaciers, clouds, vegetation, land-use, air quality, and natural hazards such as hurricanes, wildfires, and volcanic eruptions.
Originally designed for a six-year prime mission, Terra continues to deliver data used by emergency managers, researchers, and modelers over a quarter-of-a-century later. On December 18th, 2024, NASA celebrated the 25th anniversary of Terra’s launch with a celebration at the Goddard Space Flight Center (GSFC) Visitor’s Center. NASA Senior management [from NASA Headquarters and GSFC] as well as other key figures from Terra’s long history gave brief remarks and perspectives on Terra’s development and achievements. To read a review of the celebration, see “Celebrating 25 Years of Terra.”
Terra-related sessions (poster and oral) during the Fall American Geophysical Union (AGU) meeting were well-attended. The Terra team took advantage of the meeting to have a celebratory anniversary dinner that included attendees representing each of the five instruments.
Another mission to recently reach a longevity milestone is NASA’s Orbiting Carbon Observatory-2 (OCO-2), which celebrated 10 years in space last summer. OCO-2, which launched on July 2, 2014, from the Vandenburg Air Force (now Space Force) Base in California, was originally designed as a pathfinder mission to measure carbon dioxide (CO2) with the precision and accuracy needed to quantify where, when, and how the Earth inhales and exhales this important greenhouse gas seasonally. OCO-2 was part of the international Afternoon Constellation, or “A-Train,” which also included Aqua, Aura, CloudSat, and CALIPSO, as well as international partner missions.
Since its launch, OCO-2 data have revealed unprecedented insights into how the carbon cycle operates – from observing the impact and recovery of tropical land and ocean ecosystems during El Niño events to revealing the outsized impacts of extreme events, such as floods, droughts, and fires on ecosystem health and functioning. Researchers from around the world use OCO-2 data, opening new opportunities for understanding the response of the carbon cycle to human-driven perturbations, such as the impact of COVID lockdowns on atmospheric CO2 and improved quantification of emissions from large power plants and cities.
OCO-2 also maps vegetation fluorescence, which shows promise as a reliable early warning indicator of flash drought. During photosynthesis, plants “leak” unused photons, producing a faint glow known as solar-induced fluorescence (SIF). The stronger the fluorescence, the more CO2 a plant is taking from the atmosphere to power its growth. Ancillary SIF measurements from OCO-2 will help scientists better predict flash droughts, and understand how these impact carbon emissions.
Ten years into the mission, OCO-2 has become the gold standard for CO2 measurements from space. The spacecraft and instrument continue to perform nominally, producing data leading to new scientific discoveries.
OCO–3, built from spare parts during the build of OCO-2 and launched to the International Space Station (ISS) in 2019, also celebrated a milestone, marking five years in orbit on May 4, 2024. While the follow-on has the same instrument sensitivity and makes essentially the same measurements as OCO-2, the vantage point on the ISS as opposed to OCO-2’s polar orbit and the use of a new pointing mirror assembly (PMA) results in significant day-to-day spatial and temporal sampling differences that allows CO2 tracking for diurnal variability. In addition, the flexible PMA system allows for a much more dynamic observation-mode schedule.
Further out in space, about 1 million mi (~1.1 million km) from Earth, orbiting the “L1” Lagrange point between Earth and Sun, the Deep Space Climate Observatory (DSCOVR) celebrated the 10th anniversary of its launch on February 11, 2025. The two NASA Earth observing instruments on DSCOVR are the Earth Polychromatic Camera (EPIC) and National Institute of Standards and Technology (NIST) Advanced Radiometer [NISTAR].
The 10th DSCOVR EPIC NISTAR Science Team Meeting was held October 16–18, 2024 at Goddard Space Flight Center. Former U.S. Vice President Al Gore opened the meeting with remarks that focused on remote sensing and the future of Earth observations. Following Gore’s remarks, DSCOVR mission leadership and representatives from GSFC and the National Oceanic and Atmospheric Administration (NOAA) gave presentations on DSCOVR operations, EPIC calibration, and NISTAR Status and Science.
The meeting provided an opportunity for participants to learn the status of DSCOVR’s Earth-observing instruments, the status of recently released Level-2 (geophysical) data products, and the resulting science. As more people use DSCOVR data worldwide, the science team hopes to hear from users and team members at its next meeting. The latest updates from the mission can be found on the EPIC website. For more details, see the Summary of the 10th DSCOVR EPIC and NISTAR Science Team Meeting.
Flying in the space between satellites and ground-based observations, NASA’s Airborne Science Program operates a fleet of aircraft, unpiloted aerial vehicles, and even kites to study Earth and space science. Since 1987, a highly modified McDonnell Douglas DC-8 aircraft has been a mainstay of ASP’s fleet – see Photo 1. The aircraft, located at NASA’s Armstrong Flight Research Center (AFRC) in California, flew countless missions as a science laboratory, producing science data for the national and global scientific communities. NASA decided to retire the venerable DC-8 aircraft, which made its last science flight in April 2024. The DC-8 is being replaced with a similarly refurbished Boeing 777 aircraft, which will be even more capable than the DC-8 and is located at the NASA Langley Research Center (LaRC).
The NASA History Office and NASA Earth Science Division cohosted a workshop, titled “Contributions of the DC-8 to Earth System Science at NASA,” on October 24–25, 2024 at the Mary W. Jackson NASA Headquarters (HQ) Building in Washington, DC – for more details on the DC-8 event, see the article The NASA DC-8 Retires: Reflections on its Contributions to Earth System Science.
Photo 1. NASA’s DC-8 flying laboratory flew Earth science missions from 1987 to 2024. Expert maintenance allowed the aircraft to conduct research on six continents and study ice fields on the seventh, Antarctica. Image Credit: Lori Losey/NASA There are also updates from three recent NASA field campaigns – where ground observations are timed and coordinated with aircraft flights (often at more than one altitude) and with satellite overpasses to gain a comprehensive (i.e., multilayered, multiscale) picture of the atmosphere over a certain area.
The Westcoast & Heartland Hyperspectral Microwave Sensor Intensive Experiment (WHyMSIE) campaign was held from October 17- November 18, 2024. Serving as a future NASA planetary boundary-layer (PBL) mission prototype, WHyMSIE aimed to capture a wide variety of thermodynamic, moisture, and PBL regimes across a variety of surface types. WHyMSIE was an initial step towards an integrated and affordable PBL observing system of systems, with multiple observing nodes – i.e., space, suborbital, and ground – from passive and active sensors to enable a comprehensive and coherent picture of essential PBL variables and hydrometeors that is not possible with any single sensor, observational approach, or scale. As a partnership between NASA and NOAA, this field campaign flew a first-of-its-kind hyperspectral microwave airborne measurements (CoSMIR-H) that was complemented by other passive (thermal emission, solar reflectance) and active (lidar, radar) sensors flying onboard the NASA ER-2 (AFRC) and G-III (LaRC), with coordination over a variety of ground-based sensor facilities.
The GSFC Lidar Observation and Validation Experiment (GLOVE) was conducted in February 2025 at Edwards Air Force Base, California – see photo 2. GLOVE flew the Cloud Physics Lidar (CPL), Roscoe lidar, enhanced MODIS Airborne Simulator (eMAS) imaging scanner, and Cloud Radar System (CRS) on the ER-2 to validate NASA ICESat-2 atmospheric data products and validate ESA’s recently launched EarthCARE lidar, radar, and spectrometer products.
NASA’s Earth Science Division FireSense project focuses on delivering NASA’s unique Earth science and technological capabilities to operational agencies, striving to address challenges in US wildland fire management. Together with agency, academic, and private partners, FireSense completed an airborne campaign in a wildfire smoke-impacted airshed in Missoula, MT on August 27–29, 2024. During the three-day campaign, a NASA Uninhabited Aerial System (UAS) team conducted eight data-collection flights, partnering these launches with weather balloon launches.
FireSense uses airborne campaigns to evaluate capabilities and technologies to support decision making in wildland fire management and air quality forecasting. Targeted data collection produces better forecasts and more successful technology transfer to wildland fire operations. In the future, the FireSense Program will coordinate two airborne campaigns for spring 2025 at Geneva State Forest, Alabama and Kennedy Space Center located within Merritt Island National Wildlife Refuge, Florida. Both 2025 campaigns will incorporate data collection before, during, and after prescribed fire operations. Beyond NASA, the campaign works in close partnership with the U.S. Forest Service, National Weather Service, U.S. Fish and Wildlife Service, Department of Defense, as well as partners in academia and the private sector. For more information on FireSense’s most recent campaign in Montana see the Editor’s Corner supplemental summary of “The FireSense Project.”
Photo 2. NASA personnel stand in front of theNASA ER-2 at Edwards Air Force Base, California, during the GSFC Lidar Observation and Validation Experiment (GLOVE) in February 2025. Image credit: John Yorks/NASA Congratulations to Jack Kaye, Associate Director for research with the Earth Science Division within NASA’s Science Mission Directorate, who has received the William T. Pecora Award for his vision and creative leadership in multidisciplinary Earth science research, as well as spurring advancements in the investigator community, supporting development of sensors, and shaping NASA satellite and aircraft missions and research programs at the highest levels. To read more about this accomplishment, see “Kaye Honored with Pecora Award.”
On the outreach front, AGU returned to Washington, DC, for its annual meeting from December 9–14, 2024. NASA continued to uphold its long-standing tradition as an AGU partner and exhibitor, leveraging the meeting as an opportunity to share the agency’s cutting-edge research, data, and technology with the largest collection of Earth and planetary science professionals in the world. Many of the estimated 25,000 students, scientists, and industry personnel who attended the conference visited the NASA Science exhibit, interacting with NASA subject matter experts and listening to Hyperwall presentations throughout the week.
As the final event in a busy calendar of annual scientific conferences, AGU is often an opportunity for NASA scientists to publish findings from the previous year and set goals for the year ahead. The agency’s robust portfolio of missions and programs will continue to set new records, such as NASA’s Parker Solar Probe pass of the Sun, and conduct fundamental research in Earth and space science. To read more about AGU 2024, see the article: AGU 2024: NASA Science on Display in the Nation’s Capital.
Ending on a somber note, we recently posted three notable obituaries. Each of these individuals made significant contributions to EOS history, which are highlighted in the In Memoriam articles linked below.
Jeff Dozier, an environmental scientist, snow hydrologist, researcher, academic, and former EOS Project Scientist, died on November 17, 2024. Jeff embraced remote sensing with satellites to measure snow properties and energy balance. As a Project Scientist with the Earth Observing System Data and Information System (EOSDIS), he contributed to the design and management of very large information systems that would impact spatial modeling and environmental informatics.
Berrien Moore, Dean of the College of Atmospheric and Geographic Sciences at the University of Oklahoma (OU), died on December 17, 2024. Berrien served in several roles with NASA, including as a committee member and later chair of the organization’s Space and Earth Science Advisory Committee, Chair of the Earth Observing System Payload Advisory Committee, member and Chair of NASA’s Earth Science and Applications Committee, and member of the NASA Advisory Council. Berrien received NASA’s highest civilian honor, the Distinguished Public Service Medal, for outstanding service and the NOAA Administrator’s Recognition Award.
Pierre Morel, the first director of the World Climate Research Programme (WCRP) and founding member of WCRP’s Global Energy and Water Exchanges (GEWEX) Core project, died on December 10, 2024. Pierre’s work played an integral role in the development of tools used to study the atmosphere, many of which are still active today. Pierre was the recipient of the 2008 Alfred Wegener Medal & Honorary Membership for his outstanding contributions to geophysical fluid dynamics, his leadership in the development of climate research, and the applications of space observation to meteorology and the Earth system science.
Steve Platnick
EOS Senior Project Scientist
Share
Details
Last Updated Mar 20, 2025 Related Terms
Earth Science View the full article
-
By NASA
7 Min Read Fallout from the Unauthorized Gemini III Space Sandwich
Astronaut John W. Young, the pilot for Gemini III, checks over his helmet prior to flight. Credits: NASA “I hid a sandwich in my spacesuit,” Astronaut John W. Young confessed in the April 2, 1965, issue of Life Magazine. The conversation about and the consumption of the sandwich, which lasted only about 30 seconds during the Gemini III flight, became a serious matter that drew the ire of Congress and NASA’s administrator after the crew returned home. Congress was particularly upset and brought the matter to leadership’s attention at hearings about NASA’s 1966 budget. Representative George E. Shipley was especially disgusted, knowing how much money and time NASA had spent to prepare the Gemini III spacecraft for launch. The fact that a crewmember brought something into the crew cabin, which Shipley likened to a “surgeon’s operating room,” put the techniques used to prevent a spaceflight mission from failing at risk; crumbs could have made their way behind instrument panels interfering with the operation of flight equipment and the loss of the mission and its crew. Shipley called Young’s antics “foolish” and asked NASA leaders to share their thoughts.
A Beef with Corned Beef
George Mueller, associate administrator for Manned Space Flight, stated unequivocally that the agency did not “approve [of] unauthorized objects such as sandwiches going on board the spacecraft.” And he promised Shipley that NASA has “taken steps, obviously, to prevent recurrence of corned beef sandwiches in future flights. There was no detriment to the experimental program that was carried on, nor was there any detriment to the actual carrying out of the mission because of the ingestion of the sandwich.” Manned Spacecraft Center Director Robert R. Gilruth was more forgiving of Young’s decision. These sort of antics, he told the committee, helped the crews to “break up the strain” of spaceflight, and he hesitated “to be too strict in the future by laying down a lot of rules for men who have this responsibility and who, in all the flights so far, have done such good jobs.” Webb disagreed and said, “this is the United States of America’s space program and, as a matter of policy, we are not going to permit individuals to superimpose their judgment as to what is going to be taken on these flights. I think it is fine for Dr. Gilruth to take a very strong position with respect to the individuality of these men, but from those of us who have to look at the totality of the matter, this was not an adequate performance by an astronaut.”
The loss of a Gemini mission, especially one so early in the program, would have been particularly challenging for an agency attempting to land humans on the Moon where each mission built on the previous flight. The United States was in a race with the Soviet Union, and for Congress at least, the purpose of Gemini and the cost of the space program was far too serious for these sorts of fun and games. For NASA Administrator James Webb, it was a sign that Gilruth was too lax when it came to managing his astronauts. Gemini III was just one example of the lack of control he noticed, and he pressed Gilruth for a report on the sandwich incident to determine if Young should be disciplined or at the very least reprimanded.
The In-Flight Meal
Young hatched the idea during training, when his commander, Virgil I. “Gus” Grissom grew “bored” with the food they practiced with for the mission. Grissom regularly complained about the dehydrated “delicacies” food scientists concocted. Bringing a sandwich onboard, an item that was freshly made and did not have to be rehydrated, “seemed like a fun idea at the time” to Young.
Astronauts Gus Grissom (foreground), command pilot; and John Young, pilot, are shown inside their Gemini III spacecraft as they prepared for their launch from Cape Kennedy, Florida, on March 23, 1965.NASA One of the goals of their flight was to evaluate NASA’s flight food packaging and whether the containers leaked when foods were reconstituted, as well as the procedures for disposing of the meal and its packaging after eating. Foods included rehydratable items such as chicken bites, applesauce, or drinks, and compressed foods such as brownie bites. The Gemini food system was not haute cuisine, however, and crews complained about its taste. Young described the chicken bites as “barely edible” in his post-flight debriefing. Don L. Lind, a scientist-astronaut selected in 1967, described the early Gemini food as “strange.” Their class took some to jungle survival training in Panama, and while no one wanted to eat it on the first two days, by the third day they were so hungry that they were willing to give it a try. Another problem was that all rehydrated meals for Gemini were mixed with cold water, which made them less appetizing than a hot meal.
Food packets planned for the Gemini III flight, including dehydrated beef pot roast, bacon and egg bites, toasted bread cubes, orange juice and a wet wipe. The astronaut’s method for rehydrating a pouch of dehydrated food with water is shown in the top left.NASA A freshly made corned beef sandwich made at a local restaurant sounded like a better option, so Young had fellow astronaut and backup command pilot Walter M. “Wally” Schirra pick one up. Schirra purchased the sandwich for Young, and as he headed out to the launchpad, Young put it in the pocket of his pressure suit.
Nearly two hours into the flight, as Young started his food and waste evaluation, he pulled out the sandwich from his suit and offered it to his commander. As captured on the air-to-ground recordings, Grissom asked what it was and where it came from. “I brought it with me,” Young responded, “Let’s see how it tastes.” He didn’t expect the sandwich to be so pungent, “Smells, doesn’t it?” Grissom took a bite but found the rye crumbled so he placed the sandwich in his suit pocket to prevent the crumbs from floating about the cabin.
Where did that come from?
Gus Grissom
Gemini III Commander
Two days later, nearly a thousand members of the media from the United States and around the world gathered to hear from the crew and NASA management at the postflight press conference at the Carriage House Motel in Cocoa Beach, Florida. Space reporter Bill Hines asked Young about the sandwich, erroneously referring to it as a “baloney sandwich,” and what happened when Gus was offered a taste. “And,” he asked, “what became of the sandwich?” Young seemed surprised, “How did you find out about that?” and then laughed adding Grissom “ate the sandwich.”
John Young and Gus Grissom speak with the press about the Gemini III mission during a news conference at the Carriage House Motel in Florida. Behind the table, left to right, are Dr. Kurt H. Debus, director of Kennedy Space Center, Christopher C. Kraft, Jr., MSC assistant director for Flight Operations, astronauts John Young and Gus Grissom, Dr. Robert R. Gilruth, MSC director, Dr. Robert C. Seamans, NASA associate administrator, and Julian Scheer, assistant administrator for NASA’s Office of Public Affairs.NASA Carry-on Restrictions for Spaceflights
Ironically the Gemini Program offered astronauts more control over their flights than during Project Mercury, including the ability to maneuver their spacecraft and to be more independent from Mission Control; but the uproar over this event led NASA to draft rules about what astronauts could and could not take onboard a spacecraft. Starting with Gemini IV, flight crews had to present a list of items they planned to take on their missions. Prohibited items naturally included sandwiches as well as bulky or heavy items or metal that could negatively impact the operation of spacecraft equipment. (NASA still allowed astronauts to take personal items such as wedding bands or coins for families and friends in their personal preference kit.)
Young never received a formal reprimand for the incident but was made aware of Congress’s frustration. Others in the corps were advised to avoid similar stunts and to focus on the mission. The decision to bring a sandwich onboard did not have a negative impact on Young’s career. He was the first astronaut to fly to space six times —two Gemini missions; two Apollo missions, including the dress rehearsal for the first lunar landing; and two space shuttle missions including STS-1, known as the bravest test flight in history. He also served as chief of the Astronaut Office for 13 years.
Share
Details
Last Updated Mar 17, 2025 Related Terms
NASA History Gemini III Humans in Space John W. Young Virgil I. Grissom Explore More
7 min read Gemini Pioneered the Technology Driving Today’s Exploration
Article 2 years ago 4 min read Contraband Corned Beef and the Early Days of Space Biology: the Gemini III Mission
The Gemini III mission carried two remarkable firsts: an astronaut’s smuggled sandwich and NASA’s first…
Article 3 years ago 4 min read John Young Remembered as Gemini, Apollo, Space Shuttle Astronaut
Article 7 years ago Keep Exploring Discover More Topics From NASA
Project Gemini
Planets
The solar system has eight planets: Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, and Neptune. There are five officially recognized…
Humans In Space
Aeronautics
View the full article
-
By Space Force
Defense Secretary Pete Hegseth remarked on the value of the Air Force and Space Force in both deterring and engaging in future military conflicts while speaking at the Department of the Air Force Summit.
View the full article
-
By NASA
6 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Located off the coast of Ecuador, Paramount seamount is among the kinds of ocean floor features that certain ocean-observing satellites like SWOT can detect by how their gravitational pull affects the sea surface.NOAA Okeanos Explorer Program More accurate maps based on data from the SWOT mission can improve underwater navigation and result in greater knowledge of how heat and life move around the world’s ocean.
There are better maps of the Moon’s surface than of the bottom of Earth’s ocean. Researchers have been working for decades to change that. As part of the ongoing effort, a NASA-supported team recently published one of the most detailed maps yet of the ocean floor, using data from the SWOT (Surface Water and Ocean Topography) satellite, a collaboration between NASA and the French space agency CNES (Centre National d’Études Spatiales).
Ships outfitted with sonar instruments can make direct, incredibly detailed measurements of the ocean floor. But to date, only about 25% of it has been surveyed in this way. To produce a global picture of the seafloor, researchers have relied on satellite data.
This animation shows seafloor features derived from SWOT data on regions off Mexico, South America, and the Antarctic Peninsula. Purple denotes regions that are lower relative to higher areas like seamounts, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.
NASA’s Scientific Visualization Studio Why Seafloor Maps Matter
More accurate maps of the ocean floor are crucial for a range of seafaring activities, including navigation and laying underwater communications cables. “Seafloor mapping is key in both established and emerging economic opportunities, including rare-mineral seabed mining, optimizing shipping routes, hazard detection, and seabed warfare operations,” said Nadya Vinogradova Shiffer, head of physical oceanography programs at NASA Headquarters in Washington.
Accurate seafloor maps are also important for an improved understanding of deep-sea currents and tides, which affect life in the abyss, as well as geologic processes like plate tectonics. Underwater mountains called seamounts and other ocean floor features like their smaller cousins, abyssal hills, influence the movement of heat and nutrients in the deep sea and can attract life. The effects of these physical features can even be felt at the surface by the influence they exert on ecosystems that human communities depend on.
This map of seafloor features like abyssal hills in the Indian Ocean is based on sea surface height data from the SWOT satellite. Purple denotes regions that are lower relative to higher areas like abyssal hills, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.NASA Earth Observatory This global map of seafloor features is based on ocean height data from the SWOT satellite. Purple denotes regions that are lower compared to higher features such as seamounts and abyssal hills, depicted in green. Eötvös is the unit of measure for the gravity-based data used to create these maps.NASA Earth Observatory This map of ocean floor features like seamounts southwest of Acapulco, Mexico, is based on sea surface height data from SWOT. Purple denotes regions that are lower relative to higher areas like seamounts, indicated with green. Eötvös is the unit of measure for the gravity-based data used to create these maps.NASA Earth Observatory Mapping the seafloor isn’t the SWOT mission’s primary purpose. Launched in December 2022, the satellite measures the height of water on nearly all of Earth’s surface, including the ocean, lakes, reservoirs, and rivers. Researchers can use these differences in height to create a kind of topographic map of the surface of fresh- and seawater. This data can then be used for tasks such as assessing changes in sea ice or tracking how floods progress down a river.
“The SWOT satellite was a huge jump in our ability to map the seafloor,” said David Sandwell, a geophysicist at Scripps Institution of Oceanography in La Jolla, California. He’s used satellite data to chart the bottom of the ocean since the 1990s and was one of the researchers responsible for the SWOT-based seafloor map, which was published in the journal Science in December 2024.
How It Works
The study authors relied the fact that because geologic features like seamounts and abyssal hills have more mass than their surroundings, they exert a slightly stronger gravitational pull that creates small, measurable bumps in the sea surface above them. These subtle gravity signatures help researchers predict the kind of seafloor feature that produced them.
Through repeated observations — SWOT covers about 90% of the globe every 21 days — the satellite is sensitive enough to pick up these minute differences, with centimeter-level accuracy, in sea surface height caused by the features below. Sandwell and his colleagues used a year’s worth of SWOT data to focus on seamounts, abyssal hills, and underwater continental margins, where continental crust meets oceanic crust.
Previous ocean-observing satellites have detected massive versions of these bottom features, such as seamounts over roughly 3,300 feet (1 kilometer) tall. The SWOT satellite can pick up seamounts less than half that height, potentially increasing the number of known seamounts from 44,000 to 100,000. These underwater mountains stick up into the water, influencing deep sea currents. This can concentrate nutrients along their slopes, attracting organisms and creating oases on what would otherwise be barren patches of seafloor.
Looking Into the Abyss
The improved view from SWOT also gives researchers more insight into the geologic history of the planet.
“Abyssal hills are the most abundant landform on Earth, covering about 70% of the ocean floor,” said Yao Yu, an oceanographer at Scripps Institution of Oceanography and lead author on the paper. “These hills are only a few kilometers wide, which makes them hard to observe from space. We were surprised that SWOT could see them so well.”
Abyssal hills form in parallel bands, like the ridges on a washboard, where tectonic plates spread apart. The orientation and extent of the bands can reveal how tectonic plates have moved over time. Abyssal hills also interact with tides and deep ocean currents in ways that researchers don’t fully understand yet.
The researchers have extracted nearly all the information on seafloor features they expected to find in the SWOT measurements. Now they’re focusing on refining their picture of the ocean floor by calculating the depth of the features they see. The work complements an effort by the international scientific community to map the entire seafloor using ship-based sonar by 2030. “We won’t get the full ship-based mapping done by then,” said Sandwell. “But SWOT will help us fill it in, getting us close to achieving the 2030 objective.”
More About SWOT
The SWOT satellite was jointly developed by NASA and CNES, with contributions from the Canadian Space Agency (CSA) and the UK Space Agency. NASA’s Jet Propulsion Laboratory, managed for the agency by Caltech in Pasadena, California, leads the U.S. component of the project. For the flight system payload, NASA provided the Ka-band radar interferometer (KaRIn) instrument, a GPS science receiver, a laser retroreflector, a two-beam microwave radiometer, and NASA instrument operations. The Doppler Orbitography and Radioposition Integrated by Satellite system, the dual frequency Poseidon altimeter (developed by Thales Alenia Space), the KaRIn radio-frequency subsystem (together with Thales Alenia Space and with support from the UK Space Agency), the satellite platform, and ground operations were provided by CNES. The KaRIn high-power transmitter assembly was provided by CSA.
To learn more about SWOT, visit:
https://swot.jpl.nasa.gov
News Media Contacts
Jane J. Lee / Andrew Wang
Jet Propulsion Laboratory, Pasadena, Calif.
818-354-0307 / 626-379-6874
jane.j.lee@jpl.nasa.gov / andrew.wang@jpl.nasa.gov
2025-040
Share
Details
Last Updated Mar 19, 2025 Related Terms
SWOT (Surface Water and Ocean Topography) Earth Jet Propulsion Laboratory Oceans Explore More
6 min read ESA Previews Euclid Mission’s Deep View of ‘Dark Universe’
Article 9 hours ago 5 min read Atomic Layer Processing Coating Techniques Enable Missions to See Further into the Ultraviolet
Astrophysics observations at ultraviolet (UV) wavelengths often probe the most dynamic aspects of the universe.…
Article 1 day ago 3 min read Students Dive Into Robotics at Competition Supported by NASA JPL
Article 2 days ago Keep Exploring Discover Related Topics
Missions
Humans in Space
Climate Change
Solar System
View the full article
-
By NASA
The high-rise bridge that serves as the primary access point for employees and visitors to NASA’s Kennedy Space Center in Florida now is fully operational. In the late hours of March 18, 2025, the Florida Department of Transportation (FDOT) opened the westbound portion of the NASA Causeway Bridge, which spans the Indian River Lagoon and connects NASA Kennedy and Cape Canaveral Space Force Station to the mainland.
This new bridge span (right side of photo) sits alongside its twin on the eastbound side, which has accommodated traffic in both directions since FDOT opened it on June 9, 2023. The new structure replaces the old two-lane drawbridge which operated at that location for nearly 60 years.
“The old drawbridge served us well, witnessing decades of spaceflights since the Apollo era and supporting Kennedy’s transition to a multi-user spaceport,” said Kennedy’s Acting Director Kelvin Manning. “The new bridge will see NASA send American astronauts back to the Moon and on to Mars, and it will support the continued rapid growth of America’s commercial space industry here at Earth’s premier spaceport.”
At 4,025 feet long, the new NASA Causeway Bridge is about 35% longer than its predecessor, featuring a 65-foot waterway clearance and a channel wide enough to handle larger vessels carrying cargo necessary for Kennedy to continue launching humanity’s future.
The bridge sits on over 1,000 concrete pilings which total more than 22 miles in length. Nearly 270 concrete I-beams, each weighing hundreds of thousands of pounds, support the bridge, along with over 40,000 cubic yards of concrete and over 8.7 million pounds of steel. All 110 spans of the old drawbridge were demolished during the construction, with much of the material recycled for future projects.
A $90 million federal infrastructure grant secured in July 2019 by Space Florida via the U.S. Department of Transportation funded nearly 50% of the drawbridge replacement as well the widening of nearby Space Commerce Way. NASA and the state of Florida provided the remaining funding for the upgrades.
Photo credit: NASA/Glenn Benson
View the full article
-
-
Check out these Videos
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.