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Hydrology

SWOT satellite hardware transported from USA to France to complete build

Helen NormanBy Helen NormanJuly 1, 20213 Mins Read
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NASA SWOT
Teams from NASA’s Jet Propulsion Laboratory in Southern California and the March Air Reserve Base in Riverside County, California, loaded the scientific payload for the SWOT Earth-observing satellite into a C-17 airplane on June 27. Image:  NASA/JPL-Caltech
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The Surface Water and Ocean Topography (SWOT) mission, a collaboration between NASA and the French space agency Centre National d’Etudes Spatial (CNES), took a step forward this week when a team at NASA’s Jet Propulsion Laboratory (JPL) in Southern California, USA, shipped the scientific heart of the satellite to France.

A US Air Force C-17 airplane carrying the hardware, which includes finely tuned research instruments, left March Air Reserve Base in Riverside County, California, on June 27. It arrived on June 30 at a Thales Alenia Space clean room facility near Cannes, France, where engineers and technicians will spend the next year integrating the hardware with the rest of the satellite.

Once done, SWOT will make the journey back to California, where it will launch atop a SpaceX Falcon 9 rocket from Vandenberg Air Force Base no earlier than November 2022. “Now that the payload is in France, we’re a major step closer to finishing this satellite and getting to launch,” said Parag Vaze, SWOT project manager at JPL.

The SWOT mission will help scientists monitor the Earth’s ocean, as well as the amount of fresh water in its lakes and rivers. The SUV-size spacecraft will make global surveys of Earth’s surface water. By measuring its height, researchers can track the volume and location of the finite resource around the world. The data will help with monitoring changes in flood plains and wetlands, measure how much fresh water flows into and out of lakes and rivers and back to the ocean, and track regional shifts in sea level.

The information SWOT will provide on small-scale ocean currents will also support real-time ocean activities like shipping that are affected by tides, currents, storm surges, and other natural phenomena. And SWOT data will provide, for the first time, global observations of how circular currents, called eddies, affect how the ocean stores heat and releases it into the atmosphere, as well as how carbon moves through the marine environment.

SWOT is being jointly developed by NASA and CNES, with contributions from the Canadian Space Agency and UK Space Agency (UKSA). JPL, which is managed for NASA by Caltech in Pasadena, California, leads the US component of the project. For the flight system payload, NASA is providing the Ka-band Radar Interferometer (KaRIn) instrument, a GPS science receiver, a laser retroreflector, and a two-beam microwave radiometer.

Meanwhile, CNES is providing the Doppler Orbitography and Radiopositioning Integrated by Satellite (DORIS) system, nadir altimeter, and the KaRIn RF subsystem (with support from the UKSA). CSA is providing the KaRIn high-power transmitter assembly. NASA is providing associated launch services.

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