Development Status of GPS-Based Precise Orbit Determination System for Japanese Ocean Surface Topography Mission （COMPIRA）

Japan Aerospace Exploration Agency (JAXA) has proposed the first ocean surface topography mission in Japan, named COMPIRA. In the mission, JAXA will deliver near real time products to users within 6 to 12 hours(TBD), as well as precise products which require a radial orbit accuracy of 3cm RMS within 60 days (TBD). In order to meet these requirements, JAXA has developed a GPS-based Precise Orbit Determination (POD) software, which can estimate orbits of Low Earth Orbit (LEO) satellites with an accuracy of a few centimeters. This poster provides a brief overview of the POD software and accuracy evaluation results of the existing LEO satellite missions.