SMAP RFI Environment Characterization and Residual RFI Mitigation
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Publisher:The Ohio State University
Series/Report no.:The Ohio State University. Department of Electrical and Computer Engineering Honors Theses; 2019
The Soil Moisture Active/Passive (SMAP) satellite is a NASA mission that aims to provide global soil moisture data. The satellite payload is an L-band microwave radiometer that measures thermal emission from the Earth, and a complex model is used to retrieve soil moisture from the thermal emission data. The SMAP radiometer takes measurements in the frequency band of 1400-1427 MHz, which is supposed to be a protected band for passive remote sensing and therefore to be free of human produced transmissions by international regulations. However, there is clear evidence of radio frequency interference (RFI) in these frequencies due to neighboring transmissions and illegally operating sources. There are a number of RFI detection and mitigation algorithms in place to filter out RFI; however, some residual RFI are still present even after the application of all existing algorithms. This thesis offers an analysis of the RFI environment over time as well as a new technique to estimate the contribution of residual RFI on the filtered data.
Academic Major: Electrical and Computer Engineering
The Ohio State University College of Engineering