Analysis of the Wet Path Delay Spectrum from High-Resolution Airborne Observations

Shannon Brown (JPL, United States)


Reising Steve (Colorado State University, USA); Bosch Xavi (Colorado State University, USA); Kangaslahti Pekka (Jet Propulsion Lab, USA)

Event: 2015 Ocean Surface Topography Science Team Meeting

Session: Instrument Processing: Corrections

Presentation type: Type Oral

This talk presents an analysis of the wet path delay spectrum from high-resolution airborne measurements with the HAMMR microwave radiometer. Knowledge of the path delay spectrum is important for SWOT, particuarly at high spatial frequencies, below the SWOT radiometer spatial resolution. Currently, the spectrum at high frequencies is extrapolated from ~25km resolution satellite measurements. With the HAMMR system, the spectra are measured to 150m. This system includes a scanning version of the Advanced Microwave Radiometer flying on Jason-2 and -3 as well as high frequency channels from 90-183 GHz. Flights were conducted in November 2014 along the west coast of the United States and over some inland rivers and lakes. This talk will describe the instrument and the calibration applied to the radiometer. It will also discuss the path delay retrieval algorithm that was developed for the sensor. During the campaign, observations were made in both clear and cloudy conditions and spectrum will be shown for both cases. Finally, a comparison will be made to the extrpolated spectrum currently used in the SWOT error budget.

Oral presentation show times:

RoomStart DateEnd Date
Grand Ballroom 1 Tue, Oct 20 2015,15:15 Tue, Oct 20 2015,15:30
Shannon Brown
United States