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A Roughness Correction For Aquarius Ocean Brightness Temperature Using The Conae Microwave Radiometer, Yazan Hejazin
A Roughness Correction For Aquarius Ocean Brightness Temperature Using The Conae Microwave Radiometer, Yazan Hejazin
Electronic Theses and Dissertations
Aquarius/SAC-D is a joint NASA/CONAE (Argentine Space Agency) Earth Sciences satellite mission to measure global sea surface salinity (SSS), using an L-band radiometer that measures ocean brightness temperature (Tb). The application of L-band radiometry to retrieve SSS is a difficult task, and therefore, precise Tb corrections are necessary to obtain accurate measurements. One of the major error sources is the effect of ocean roughness that "warms" the ocean Tb. The Aquarius (AQ) instrument (L-band radiometer/scatterometer) baseline approach uses the radar scatterometer to provide this ocean roughness correction, through the correlation of radar backscatter with the excess ocean emissivity. In contrast, …
An On-Orbit Calibration Procedure For Spaceborne Microwave Radiometers Using Special Spacecraft Attitude Maneuvers, Spencer Farrar
An On-Orbit Calibration Procedure For Spaceborne Microwave Radiometers Using Special Spacecraft Attitude Maneuvers, Spencer Farrar
Electronic Theses and Dissertations
This dissertation revisits, develops, and documents methods that can be used to calibrate spaceborne microwave radiometers once in orbit. The on-orbit calibration methods discussed within this dissertation can provide accurate and early results by utilizing Calibration Attitude Maneuvers (CAM), which encompasses Deep Space Calibration (DSC) and a new use of the Second Stokes (SS) analysis that can provide early and much needed insight on the performance of the instrument. This dissertation describes pre-existing and new methods of using DSC maneuvers as well as a simplified use of the SS procedure. Over TRMM's 17 years of operation it has provided invaluable …