Calibration and characterization of a scanning L-band Active Passive (SLAP) microwave radiometer

Scanning L-band Active/Passive (SLAP) is an airborne remote sensing instrument developed at NASA Goddard Space Flight Center specifically as an airborne simulator of the Soil Moisture Active/Passive (SMAP) satellite instrument suite, for remote sensing of soil moisture, freeze-thaw state, ocean salinity, sea ice, and other physical phenomena that display characteristics at microwave L-band. This paper will present example observations from a recent soil freeze-thaw campaign in Winnipeg, Manitoba, Canada, as well as detail enhancements made to the SLAP RFI processor beyond the capabilities of the SMAP RFI processor.