ICESat‐2 Precision Orbit Determination
نویسندگان
چکیده
The ICESat-2 Precision Orbit Determination (POD) system computes the precise position of laser altimeter instrument in inertial space, a measurement necessary for accurate geolocation individual photon surface returns. POD solutions are generated by reduction Global Positioning System (GPS) double-difference carrier phase observable residuals with NASA Goddard Space Flight Center's GEODYN software. Independent satellite ranging (SLR) measurements withheld from and used as an independent arbiter performance. Measurement model updates form estimated GPS antenna center retro-reflector tracking point offset vectors well variation map have led to significant improvement residual analysis orbit precision show no anomalous temporal or geographic performance issues. SLR indicates that achieved radial accuracy just below 1.5 cm, thus exceeding mission requirement 3.0 cm more than factor 2. Future processing been identified will lead even further improvements
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ژورنال
عنوان ژورنال: Earth and Space Science
سال: 2021
ISSN: ['2333-5084']
DOI: https://doi.org/10.1029/2020ea001496