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By NASA
Dr. Eugene Tu, center director at NASA’s Ames Research Center in California’s Silicon Valley, presents Representative Anna Eshoo with a replica of the Pioneer plaque during a recognition event for her 32 years of public service.NASA/Brandon Torres Navarrete On Oct. 29, NASA’s Ames Research Center in California’s Silicon Valley hosted a gathering to recognize Representative Anna G. Eshoo for her 32 years of distinguished public service and her enduring support for the agency. During the event, Dr. Eugene Tu, center director at Ames, presented the Congresswoman with the Pioneer plaque, a replica of the messages sent on the Pioneer 10 and 11 probes, which launched in 1972 and 1973 respectively.
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By NASA
4 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
A SWOT data visualization shows water on the northern side of Greenland’s Dickson Fjord at higher levels than on the southern side on Sept. 17, 2023. A huge rockslide into the fjord the previous day led to a tsunami lasting nine days that caused seismic rumbling around the world. NASA Earth Observatory Data from space shows water tilting up toward the north side of the Dickson Fjord as it sloshed from south to north and back every 90 seconds for nine days after a 2023 rockslide.
The international Surface Water and Ocean Topography (SWOT) satellite mission, a collaboration between NASA and France’s CNES (Centre National d’Études Spatiales), detected the unique contours of a tsunami that sloshed within the steep walls of a fjord in Greenland in September 2023. Triggered by a massive rockslide, the tsunami generated a seismic rumble that reverberated around the world for nine days. An international research team that included seismologists, geophysicists, and oceanographers recently reported on the event after a year of analyzing data.
The SWOT satellite collected water elevation measurements in Dickson Fjord on Sept. 17, 2023, the day after the initial rockslide and tsunami. The data was compared with measurements made under normal conditions a few weeks prior, on Aug. 6, 2023.
In the data visualization (above), colors toward the red end of the scale indicate higher water levels, and blue colors indicate lower-than-normal levels. The data suggests that water levels at some points along the north side of the fjord were as much as 4 feet (1.2 meters) higher than on the south.
“SWOT happened to fly over at a time when the water had piled up pretty high against the north wall of the fjord,” said Josh Willis, a sea level researcher at NASA’s Jet Propulsion Laboratory in Southern California. “Seeing the shape of the wave — that’s something we could never do before SWOT.”
In a paper published recently in Science, researchers traced a seismic signal back to a tsunami that began when more than 880 million cubic feet of rock and ice (25 million cubic meters) fell into Dickson Fjord. Part of a network of channels on Greenland’s eastern coast, the fjord is about 1,772 feet (540 meters) deep and 1.7 miles (2.7 kilometers) wide, with walls taller than 6,000 feet (1,830 meters).
Far from the open ocean, in a confined space, the energy of the tsunami’s motion had limited opportunity to dissipate, so the wave moved back and forth about every 90 seconds for nine days. It caused tremors recorded on seismic instruments thousands of miles away.
From about 560 miles (900 kilometers) above, SWOT uses its sophisticated Ka-band Radar Interferometer (KaRIn) instrument to measure the height of nearly all water on Earth’s surface, including the ocean and freshwater lakes, reservoirs, and rivers.
“This observation also shows SWOT’s ability to monitor hazards, potentially helping in disaster preparedness and risk reduction,” said SWOT program scientist Nadya Vinogradova Shiffer at NASA Headquarters in Washington.
It can also see into fjords, as it turns out.
“The KaRIn radar’s resolution was fine enough to make observations between the relatively narrow walls of the fjord,” said Lee-Lueng Fu, the SWOT project scientist. “The footprint of the conventional altimeters used to measure ocean height is too large to resolve such a small body of water.”
More About SWOT
Launched in December 2022 from Vandenberg Space Force Base in California, SWOT is now in its operations phase, collecting data that will be used for research and other purposes.
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 KaRIn instrument, a GPS science receiver, a laser retroreflector, a two-beam microwave radiometer, and NASA instrument operations. CNES provided the Doppler Orbitography and Radioposition Integrated by Satellite (DORIS) 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. CSA provided the KaRIn high-power transmitter assembly. NASA provided the launch vehicle and the agency’s Launch Services Program, based at Kennedy Space Center in Florida, managed the associated launch services.
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
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Last Updated Oct 31, 2024 Related Terms
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By Space Force
The U.S. Space Force and Canadian Armed Forces have kicked off an Operations and Sustainment Phase which will provide Canada with six years of access to the Space Force’s Mobile User Objective System Satellite System.
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By European Space Agency
In 2023, ESA published more than 400 vacancies in engineering, science and business and administration and more positions continue to be published as we are always on the lookout for talented new colleagues to join us. So, what does it mean to join ESA? Here are five reasons why you should consider ESA as the next step in your career!
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
Two NASA employees, Howard Chang and Bradley Williams, were named as two of the “20 under 35 of 2024” by the Space and Satellite Professionals International. The award recognizes outstanding young professionals in the space industry.
Photos courtesy of Bradley Williams and Howard Chang The annual list of “20 Under 35” features 20 employees and entrepreneurs to keep your eye on in coming years. They were selected from nominations submitted by the membership and evaluated by the same panel of judges who name winners of the Promise Awards.
Howard Chang is an Assistant Chief Counsel at NASA’s Goddard Space Flight Center in Greenbelt, Maryland. Bradley (Brad) Williams is the Acting Associate Director for Flight, Heliophysics Division, NASA Science Mission Directorate at NASA Headquarters, Washington.
“I’m honored to be named in this year’s cohort,” Chang said. “I saw how SSPI connects people across the space and satellite industry—across generations, countries, and even disciplines—to build up the space economy of the future. And I can’t express enough thanks to all my NASA colleagues for their support and kindness—especially Deputy Chief Counsel Amber Hufft for her time and mentorship this year.”
“It is an absolute honor to be recognized by SSPI on the 20 under 35 list of 2024,” said Williams. “I feel privileged to have benefitted from the opportunities I’ve had so far in my career. I want to thank the numerous mentors through the years who have provided me guidance and lessons learned and especially my colleagues and the leaders at NASA who have recognized my contributions and supported my growth potential as a leader.”
About Howard Chang
Howard Chang serves as the lead attorney for NASA’s Wallops Flight Facility’s commercial, nonprofit, and interagency partnerships in Wallops Island, Virginia. He also focuses on legal issues involving Unmanned Aircraft Systems (UAS), small UAS, real property transactions, government contracts litigation and administration supporting NASA Goddard, and partnerships involving the Goddard Institute for Space Studies located at Columbia University, New York, NASA commended Chang with an individual merit award in recognition of his superior support to the Goddard Space Flight Center during his first six months.
In addition to his legal work, Chang contributes substantially to thought leadership in space law and policy. He has authored articles for The Federalist and the International Institute of Space Law on topics from the Apollo 8 mission to the travaux preparatoires of the Principles Declaration of 1963—the precursor to the Outer Space Treaty. He is a frequent speaker on matters of space law. He will be presenting at the 2024 International Astronautical Congress in Milan, Italy on the Wolf Amendment and the future of the International Space Station. In Milan, he will present in his capacity as an Advisor for the Georgetown University Space Initiative. He continues to serve as a guest lecturer on space policy for law schools and undergraduate space courses as well.
Chang previously worked at an international firm in its aerospace finance and space law practices, engaging in litigation, transactional, regulatory, and policy work for aerospace and space companies. In addition, he worked on white-collar criminal defense, internal corporate investigations, congressional investigations, trial litigation, appellate litigation, and national security matters.
About Bradley Williams
Bradley Williams is the acting Associate Director for Flight Programs in the Heliophysics Division of the Science Mission Directorate at NASA Headquarters, Washington where he oversees more than a dozen missions in operations and approximately another dozen missions in different stages of development.
Previously, Williams was a Program Executive in the Heliophysics Division where his assignments included IMAP, TRACERS, HelioSwarm, the Solar Cruiser solar sail technology project, and Senior Program Executive of the NASA Space Weather Program.
Before joining NASA, he was the Director of Civil Space Programs at Terran Orbital Corporation, where he led the spacecraft development for both commercial and NASA technology demonstration missions and assisted with the growth of the science mission portfolio.
Previously at the University of Arizona, he worked with faculty and research teams to identify proposal opportunities and develop spaceflight proposals. Williams was a vital member of the OSIRIS-REx Camera Suite (OCAMS) team. He also served as the Deputy Payload Manager on GUSTO, the first of its kind, balloon-borne observatory.
He has been recognized for his achievements being named a Via Satellite Rising Star in 2024 and has been awarded the Robert H. Goddard Engineering Team Award, NASA Group Achievement Award, and asteroid (129969) Bradwilliams named in his honor.
The “20 Under 35“ are honored each year at SSPI’s Future Leaders Dinner. At the Dinner, SSPI presents the three top-ranked members of the 20 Under 35 with a Promise Award, recognizing them as leaders of their year’s cohort, and honors the Mentor of the Year for fostering young talent, both within his or her organization and throughout the industry. The 2024 “20 Under 35” will be honored at the Future Leaders Celebration on October 21, 2024 during Silicon Valley Space Week.
Rob Gutro
NASA’s Goddard Space Flight Center
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Last Updated Oct 03, 2024 EditorJamie AdkinsContactRob Garnerrob.garner@nasa.gov Related Terms
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