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By NASA
As an IT security administrator at NASA’s Johnson Space Center in Houston, Mechele Elliott protects the information systems that support astronaut health and mission readiness.
The encouragement of a family friend set her on this path, leading to a rewarding and somewhat unexpected career in human spaceflight.
Mechele Elliott stands in front of a space shuttle cockpit mockup in the lobby of the Mission Control Center at NASA’s Johnson Space Center in Houston. Image courtesy of Mechele Elliott “While I was caring for my son during his cancer treatment—living in the hospital with him and supporting his recovery at home—a family friend who worked at NASA took notice,” Elliott said. “She quietly observed my strength, organization, and unwavering dedication to my son. One day she called and said, ‘Get your resume together.’”
Elliott doubted she was qualified for a position at NASA, though the friend was certain she could learn and handle anything after caring for her son. “Her belief in me gave me the courage to take that first step—and it changed the course of my life.”
The friend’s endorsement helped her land the position. Elliott was nervous at first, since she did not know much about NASA’s operations and had limited prior experience. With time and training, she grew more certain of the value she brought to the team.
“Reflecting on the numerous personal challenges I have encountered has reinforced my confidence in my ability to overcome obstacles while maintaining a positive outlook throughout my journey,” she said. “I am proud to have successfully adapted and become a productive member of my team.” In her role today, Elliott safeguards NASA’s information systems. She develops, implements, and maintains security policies, procedures, and systems in the Human Health and Performance Directorate, ensuring compliance with federal and NASA-specific security standards. Her work includes managing access control protocols and responding to security incidents.
Mechele Elliott in the Neutral Buoyancy Laboratory at Johnson Space Center. Image courtesy of Mechele Elliott One of her most challenging tasks involved assessing, revitalizing, and implementing four outdated security plans through collaboration with a diverse team. “We successfully aligned the security plans with established standards and garnered commendations from NASA leadership,” she said.
Outside of work, Elliott enjoys several hobbies that help her relax and maintain balance. She began painting at a young age and continues to find calm through her art. She is an avid gardener, in spite of the Houston summer heat, and feels fulfilled by the beauty of her flowers and sharing homegrown fruits and vegetables with her friends and family. She has also earned a reputation as an excellent baker. “I enjoy making cheesecakes for workplace celebrations and I’ve discovered that many of my coworkers enjoy this hobby of mine, as well!”
Elliott is profoundly grateful for the opportunity to serve at NASA for over 25 years. Looking ahead to the agency’s future, she offers an important piece of advice to up-and-coming team members. “Remain authentic to yourselves, pursue your aspirations with determination, and uphold a commitment to excellence in all your endeavors.”
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By European Space Agency
Image: Group photo taken at the General Assembly on Defence, Space and Cybersecurity, held on Friday 12 September 2025, at ESRIN, ESA’s Centre for Earth Observation Programmes in Italy.
The event was organised by the European Parliament and the European Commission, in collaboration with the European Space Agency, to promote dialogue between European and national decision-makers and industry leaders. Representatives from major European entities debated the future of the European Union, which is facing unprecedented challenges since the postwar period, in an increasingly complex geopolitical context. Participants examined Europe’s needs in key sectors such as space, cybersecurity, and defence, within the broader context of the Atlantic Alliance. Acting at the European level, as demonstrated by projects like Galileo, EGNOS, and Copernicus, not only brings extraordinary added value in terms of innovation, industrial competitiveness, economies of scale, and spending efficiency, but also strengthens Europe’s strategic autonomy, the security of its citizens, and the protection of its critical infrastructure.
The group included experts from major European entities, including: Andrius Kubilius, European Commissioner for Defence and Space; Adolfo Urso, Italian Minister of Enterprises and Made in Italy; Matteo Piantedosi, Italian Minister of the Interior; Gen. B. Luigi Vinciguerra, Brigade General of the Guardia di Finanza – Head of the III Operations Department, General Command; Josef Aschbacher, Director General of the European Space Agency; Simonetta Cheli, Director of Earth Observation Programmes and Head of ESRIN; Carlo Corazza, Head of the European Parliament Office in Italy; Ammiraglio Giuseppe Cavo Dragone, Chairman of the NATO Military Committee; Teodoro Valente, President of the Italian Space Agency (ASI); Hans de Vries, Chief Cybersecurity and Operations Officer (COO) - ENISA; Fabio di Stefano, Communications at the European Parliament in Italy.
Watch here a replay of ESA Director General's intervention and find the transcript of his speech.
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By NASA
5 min read
Preparations for Next Moonwalk Simulations Underway (and Underwater)
A ship plows through rough seas in the Bering Sea in the aftermath of Typhoon Tip, one of the largest hurricanes on record. The Sentinel-6B satellite will provide data crucial to forecasting sea states, information that can help ships avoid danger. CC BY 2.0 NOAA/Commander Richard Behn Sea surface height data from the Sentinel-6B satellite, led by NASA and ESA, will help with the development of marine weather forecasts, alerting ships to possible dangers.
Because most global trade travels by ship, accurate, timely ocean forecasts are essential. These forecasts provide crucial information about storms, high winds, and rough water, and they depend on measurements provided by instruments in the ocean and by satellites including Sentinel-6B, a joint mission led by NASA and ESA (European Space Agency) that will provide essential sea level and other ocean data after it launches this November.
The satellite will eventually take over from its twin, Sentinel-6 Michael Freilich, which launched in 2020. Both satellites have an altimeter instrument that measures sea levels, wind speeds, and wave heights, among other characteristics, which meteorologists feed into models that produce marine weather forecasts. Those forecasts provide information on the state of the ocean as well as the changing locations of large currents like the Gulf Stream. Dangerous conditions can result when waves interact with such currents, putting ships at risk.
“Building on NASA’s long legacy of satellite altimetry data and its real-world impact on shipping operations, Sentinel-6B will soon take on the vital task of improving ocean and weather forecasts to help keep ships, their crews, and cargo safe”, said Nadya Vinogradova Shiffer, lead program scientist at NASA Headquarters in Washington.
Sentinel-6 Michael Freilich and Sentinel-6B are part of the Sentinel-6/Jason-CS (Continuity of Service) mission, the latest in a series of ocean-observing radar altimetry missions that have monitored Earth’s changing seas since the early 1990s. Sentinel-6/Jason-CS is a collaboration between NASA, ESA, the European Union, EUMETSAT (European Organisation for the Exploitation of Meteorological Satellites), and NOAA (U.S. National Oceanic and Atmospheric Administration). The European Commission provided funding support, and the French space agency CNES (Centre National d’Études Spatiales) contributed technical support.
Keeping current
“The ocean is getting busier, but it’s also getting more dangerous,” said Avichal Mehra, deputy director of the Ocean Prediction Center at the National Weather Service in College Park, Maryland. He and his colleagues produce marine weather forecasts using data from ocean-based instruments as well as complementary measurements from five satellites, including Sentinel-6 Michael Freilich. Among those measurements: sea level, wave height, and wind speed. The forecasters derive the location of large currents from changes in sea level.
One of the planet’s major currents, the Gulf Stream is located off the southeastern coast of the United States, but its exact position varies. “Ships will actually change course depending on where the Gulf Stream is and the direction of the waves,” said Mehra. “There have been instances where, in calm conditions, waves interacting with the Gulf Stream have caused damage or the loss of cargo containers on ships.”
Large, warm currents like the Gulf Stream can have relatively sharp boundaries since they are generally higher than their surroundings. Water expands as it warms, so warm seawater is taller than cooler water. If waves interact with these currents in a certain way, seas can become extremely rough, presenting a hazard to even the largest ships.
“Satellite altimeters are the only reliable measurement we have of where these big currents can be,” said Deirdre Byrne, sea surface height team lead at NOAA in College Park.
There are hundreds of floating sensors scattered about the ocean that could pick up parts of where such currents are located, but these instruments are widely dispersed and limited in the area they measure at any one time. Satellites like Sentinel-6B offer greater spatial coverage, measuring areas that aren’t regularly monitored and providing essential information for the forecasts that ships need.
Consistency is key
Sentinel-6B won’t just help marine weather forecasts through its near-real-time data, though. It will also extend a long-term dataset featuring more than 30 years of sea level measurements, just as Sentinel-6 Michael Freilich does today.
“Since 1992, we have launched a series of satellites that have provided consistent sea level observations from the same orbit in space. This continuity allows each new mission to be calibrated against its predecessors, providing measurements with centimeter-level accuracy that don’t drift over time,” said Severine Fournier, Sentinel-6B deputy project scientist at NASA’s Jet Propulsion Laboratory in Southern California.
This long-running, repeated measurement has turned this dataset into the gold standard sea level measurement from space — a reference against which data from other sea level satellites is checked. It also serves as a baseline, giving forecasters a way to tell what ocean conditions have looked like over time and how they are changing now. “This kind of data can’t be easily replaced,” said Mehra.
More about Sentinel-6B
Sentinel-6/Jason-CS was jointly developed by ESA, EUMETSAT, NASA, and NOAA, with funding support from the European Commission and technical support from CNES.
A division of Caltech in Pasadena, JPL contributed three science instruments for each Sentinel-6 satellite: the Advanced Microwave Radiometer, the Global Navigation Satellite System – Radio Occultation, and the Laser Retroreflector Array. NASA is also contributing launch services, ground systems supporting operation of the NASA science instruments, the science data processors for two of these instruments, and support for the U.S. members of the international Ocean Surface Topography and Sentinel-6 science teams.
For more about Sentinel-6/Jason-CS, visit:
https://sealevel.jpl.nasa.gov/missions/jason-cs-sentinel-6
News Media Contacts
Jane J. Lee / Andrew Wang
Jet Propulsion Laboratory, Pasadena, Calif.
626-491-1943 / 626-379-6874
jane.j.lee@jpl.nasa.gov / andrew.wang@jpl.nasa.gov
2025-116
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Last Updated Sep 11, 2025 Related Terms
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