Radio-Frequency Interference (RFI) in Passive Microwave Sensing
Electromagnetic interference (EMI)
Radio-frequency interference (RFI) in passive microwave remote sensing occurs when anthropogenic (man-made) signals contaminate calibrated radiometric brightness temperature measurements of naturally occurring background thermal radiation resulting in anomalous measurements.
Radio-frequency interference (RFI) to space-based passive microwave remote sensing systems became an important consideration after brightness temperature measurements from the Advanced Microwave Scanning Radiometer on NASA’s Earth Observing System (AMSR-E) showed widespread contamination from anthropogenic emissions. The AMSR-E, part of NASA’s Aqua mission, was launched on May 4, 2002, and was the first space-based radiometer since the scanning multichannel microwave radiometer (SMMR) (the SeaSat 7 mission ended in October 1987 and carried the last SMMR) to measure upwelling brightness temperatures near 6.8 GHz. Contamination (RFI) of brightness...
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