Evaluation Results of GPS-based Precise Orbit Determination for Earth Observation Satellite in Near Realtime Operation

摘要

This paper presents the Precise Orbit Determination (POD) application aiming to provide precise ephemeris of Earth Observation Satellite (EOS) to users within 10 minutes from the time when we receive onboard GPS observations and satellite attitude information. The GPS satellite's orbit and high-rate clock bias are estimated using the terrestrial GPS hourly observation data. Specifically, we describe an outline of an application which automatically carries out a series of processing from estimating EOS's precise ephemeris to performing accuracy evaluation. In addition, we explain the evaluation results on accuracy and latency of the precise ephemeris calculated using on-orbit data of the Advanced Land Observing Satellite-2 (ALOS-2) operated by Japan Aerospace Exploration Agency (JAXA).