Korea Aerospace Research Institute (KARI) has been conducting the satellite mission operations for Korea Multi-Purpose Satellite (KOMPSAT) series. Flight dynamics functions of KOMPSAT series operation include comprehensive orbital analysis and mission planning support as well as orbit data distribution for image processing by conducting Operational Orbit Determination (OOD), Orbit Prediction (OP), Orbit Maneuver Planning (OMP), Ground Track Maintenance (GTM) and Precision Orbit Determination (POD). Precise orbit of KOMPSAT series was estimated and released on a daily basis. POD processing of KOMPSAT was using the Global Positioning System (GPS) measurements including pseudo-range and carrier phase measurement data from onboard GPS receivers. In flight dynamics operations, the accuracy of POD was evaluated by the root-mean square error of daily POD ephemeris in comparison with previous POD ephemeris using overlapping method. But, sometimes, POD accuracy does not meet its requirements due to the various erroneous sources, which include data unavailability or defective data in GPS ephemeris and International GNSS Service (IGS) Station information. In this paper, exceptional cases of POD processing are thoroughly analyzed to reduce data latency for robustness of software in terms of satellite operations. For this purpose, flight dynamics team rebuilds the POD processing flow in more efficient way and add an additional correction steps to provide the quality-controlled orbit ephemeris. The high-fidelity proven capabilities for POD processing provided by commercial software such as MicroCosm and in-house algorithms are extensively used for this purpose. Finally, POD data accuracy of KOMPSAT series is improved and data latency is reduced than previous workflow. It could be reference to setup an operational strategy for the POD processing in terms of robust orbit data processing and rapid data provision.
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