1. RFI Characterization and Mitigation for the SMAP Radar.
- Author
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Spencer, Michael W., Chen, Curtis W., Ghaemi, Hirad, Chan, Samuel F., and Belz, John E.
- Subjects
RADIO interference ,SOIL moisture measurement ,RADIOMETERS ,SURFACE states ,REMOTE sensing by radar - Abstract
The Soil Moisture Active–Passive (SMAP) mission will launch in late 2014 and will carry a combined L-band radiometer/radar instrument for the retrieval of global soil moisture and surface freeze-thaw state. Radio frequency interference (RFI) is a known challenge for Earth remote sensing in the L-band portion of the spectrum. This paper addresses efforts to characterize and mitigate RFI for the SMAP radar. A model for the RFI environment due to surface-based emitters is developed, and is shown to agree well with the observations of currently operating L-band radar systems. An analysis of the environment due to space-based emitters is also presented. Techniques to mitigate RFI in the radar band are described, and are shown to perform sufficiently well to meet the stringent SMAP measurement requirements. A companion paper addresses the different issues encountered with RFI in the radiometer band. [ABSTRACT FROM AUTHOR]
- Published
- 2013
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