Study on Operation Safety of RNSS and Long-Term Evolution of Disposal Orbit

Considering that regional navigation satellite system (RNSS) will deploy more and more satellites in inclined geosynchronous orbit (IGSO) in the future, it is necessary to carry out research on operational safety of RNSS and the long-term evolution of disposal orbit. With reference to the technical study and international guidelines of satellite at the end of life (EOL) disposal, the study on the stability of disposal orbit of IGSO satellites has been carried out in the report. It has been proved that the stability of disposal orbit is dependent on the initial orbit parameters in the report. The application of the disposal strategy proposed in this report can significantly prevent the rapid growth of orbit eccentricity and successfully establish a stable disposal orbit. The recommendation on specific disposal parameters of BDS, QZSS and IRNSS IGSO satellites have been given in the report so that the disposal orbit would be stable after the satellite de-orbited or the satellite would re-enter the atmosphere as soon as possible.