NASA logoCASEI Logo
NASA | CASEI
Arrow leftBack to Explore

Instrument

GREX
Goddard Radio Frequency Explorer

The Goddard Radio Frequency Explorer (GREX) is an airborne microwave radiometer developed at the Goddard Space Flight Center (GSFC). It measures brightness temperature at L-band (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 measurements. It has a spatial resolution of less than 1 km and a sampling rate of 400 megasamples per second (MSPS) across two polarization channels.

NASA's DC-8 flying laboratory passes Antarctica's tallest peak, Mount Vinson, on Oct. 22, 2012, during a flight over the continent to measure changes in the massive ice sheet and sea ice. Credit: NASA/Michael Studinger (Photography courtesy NASA Images)

Overview

Instrument Details

Spectrometer/Radiometer
Earth Science > Land Surface > Soils > Soil Moisture/water Content
Earth Science > Agriculture > Soils > Soil Moisture/water Content
Earth Science > Spectral/engineering > Microwave > Brightness Temperature
Earth Science > Spectral/engineering > Microwave > Microwave Radiance
Land Surface
N/A
< 1 km
1400-1427 MHz
Currently unavailable

  • Edward Kim

  • Edward Kim

  • GSFC

  • Currently unavailable

  • Currently unavailable

    • Unpublished

Instrument Operation

GRAINEX

Great Plains Irrigation Experiment

2018
Southeastern Nebraska
view all deployment dates
1 Deployment
· 0 Data Products

Data Products