Simplified solution for osculating Keplerian parameter corrections of GEO satellites for intersatellite optical link

Yilmaz U. C. , ÇAVDAR İ. H.

ADVANCES IN SPACE RESEARCH, vol.55, no.7, pp.1878-1884, 2015 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 55 Issue: 7
  • Publication Date: 2015
  • Doi Number: 10.1016/j.asr.2014.12.004
  • Page Numbers: pp.1878-1884


In intersatellite optical communication, the Pointing, Acquisition and Tracking (PAT) phase is one of the important phases that needs to be completed successfully before initiating communication. In this paper, we focused on correcting the possible errors on the Geostationary Earth Orbit (GEO) by using azimuth and elevation errors between Low Earth Orbit (LEO) to GEO optical link during the PAT phase. To minimise the PAT duration, a simplified correction of longitude and inclination errors of the GEO satellite's osculating Keplerian parameters has been suggested. A simulation has been done considering the beaconless tracking and spiral-scanning technique. As a result, starting from the second day, we are able to reduce the uncertainty cone of the GEO satellite by about 200 mu rad, if the values are larger than that quantity. The first day of the LEO GEO links have been used to determine the parameters. Thanks to the corrections, the locking time onto the GEO satellite has been reduced, and more data are able to transmit to the GEO satellite. (C) 2014 COSPAR. Published by Elsevier Ltd. All rights reserved.