Earth  ID: 11743

SMAP Radiometer versus Radio Frequency Interference

The microwave radiometer on NASA's Soil Moisture Active Passive (SMAP) satellite was designed and built at NASA's Goddard Space Flight Center. Along with the microwave radar, data from the radiometer will be used to calculate the water content of Earth's soil.

All types of soil emit microwave radiation, but the amount of water changes how much of this energy is emitted. The drier the soil, the more microwave energy; the wetter the soil, the less energy.

But radio frequency interference is a problem, even though the instrument is passively listening in a region of the microwave spectrum where transmission is prohibited. Some of the signals from the surrounding regions leak into the protected "listen-only" band. Goddard engineers developed new hardware and software to search for and cut out the erroneous measurements.


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Jeff Piepmeier (NASA/GSFC): Scientist
Matthew R. Radcliff (USRA): Lead Producer
Matthew R. Radcliff (USRA): Video Editor
Brian Monroe (USRA): Animator
Kate Ramsayer (Telophase): Writer
Rob Andreoli (Advocates in Manpower Management, Inc.): Lead Videographer
John Caldwell (Advocates in Manpower Management, Inc.): Videographer
Swarupa Nune (InuTeq): Narrator
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NASA's Goddard Space Flight Center

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This item is part of this series:
Narrated Movies

Goddard TV Tape:
G2015-009 -- SMAP Radiometer

NASA Science >> Earth