Penina Axelrad (University of Colorado Boulder, United States); Shailen Desai (Jet Propulsion Laboratory, California Institute of Technology, United States); Bruce Haines (Jet Propulsion Laboratory, California Institute of Technology, United States)

The primary focus of this presentation is to evaluate the GPS transmitter antenna calibration maps and impacts on the Precise Orbit Determination (POD) of the Sentinel-6 Michael Freilich (MF) mission using the onboard TriG Global Positioning System (GPS) receiver. We evaluate the Block III residuals using a Block II derived receiver antenna calibration map and Block II POD solution. Residuals are stacked to assess the azimuthal and elevation dependencies in the Block III transmitter frame. Also, the Block II transmitter residuals are stacked to incorporate the azimuthal variability into updated maps. Finally, withheld satellite laser ranging residuals are used to evaluate the differences of incorporating the Block III satellites and updated Block II antenna calibration maps into the Sentinel-6 MF POD solution.