Engineering topics
Publications and source records attributed to Nemesure, Michael.
Two independent trajectory software systems are used to perform the TOPEX/Poseidon operational orbit determination and propogation: the Goddard Trajectory Determinaiton System (GTDS) at the GSFC/FDF and the Double Precision Trajectory System (DPTRAJ) at JPL.
Two independent trajectory software systems are used to perform the TOPEX/Poseidon operational orbit determination and propagation: the Goddard Trajectory Determination System (GTDS) at the GSF/FDF and the Double Precision Trajectory System (DPTRAJ) at JPL. GTDS is used for operational tracking and TDRS-based orbit determination. DPTRAJ is used for ephemeris generation necessary to conduct day-to-day mission operations. This paper describes the DPTRAJ/GTDS trajectory comparison analysis conducted jointly by JPL and GSFC to ensure the compatibility of these two independent trajectory software systems.
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