For KOMPSAT-5, the occultation mission is a secondary mission. The KOMPSAT-5 has two occultation antennas for rising and setting occultations observations. Simulations of the KOMPSAT-5 mission are provided by using EGOPS (End-to-end GNSS Occultation Performance Simulator) (Kirchengast et al. 2002). It has been shown that KOMPSAT-5 may observe more than 500 occultation events per day in normal conditions. Figure 8 shows all occultation events for one day of simulation for KOMPSAT-5. The data from two POD antennas are utilized together with occultation data. The observed occultation data will be stored in the Solid State Recorder (SSR) and collected by the spacecraft's 1553B bus interface. The data downlink to the ground station is via S-band telemetry.
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