The Goddard Radio Frequency Explorer (GREX) is an airborne microwave radiometer developed at the Goddard Space Flight Center (GSFC). It measures brightness temperature at the L-band frequency (1400-1427 MHz), similar to the Soil Moisture Active Passive (SMAP) satellite when paired with an appropriate antenna. GREX is used for radio-frequency interference (RFI) surveys and soil moisture content measurement. It has a spatial resolution of less than 1 km and a sampling rate of 400 megasamples per second (MSPS) for two polarization channels.

Instrument Details
- Spectrometer/Radiometer
- Earth Science > Land Surface > Soils > Soil Moisture/water ContentEarth Science > Agriculture > Soils > Soil Moisture/water ContentEarth Science > Spectral/engineering > Microwave > Brightness TemperatureEarth Science > Spectral/engineering > Microwave > Microwave Radiance
- Land Surface
- N/A
- < 1 km
- 1400-1427 MHz
- Currently unavailble
Edward Kim
Edward Kim
GSFC
Currently unavailable
Currently unavailable
Unpublished
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