Collocation Assessment between GEO and GSO Satellites

The change in orbit evolution between collocated satellites (X, Y) inside +/-0.09° E/W and +/- 0.07° N/S cluster, after one of these satellites is placed in an inclined orbit (satellite X) and the effect of this change in the collocation safety inside the cluster window has been studied and evaluated. Several collocation scenarios had been studied in order to adjust the location of both satellites inside their cluster to maximize the separation between them and safe the mission.

Authors:

• A. E. Emam
• M. Abd Elghany

Keywords:

• Satellite
• GEO
• collocation
• risk assessment.

References:

[1] Dinakar Prasad Vajja, “Deep Space Orbit Determination”, Master of
Science Thesis, Chalmers University, Sweden, December 2005.
[2] Robert Wolf, “Satellite Orbit and Ephemeris Determination using Inter
Satellite Links”, PHD – Germany, 2000.
[3] Srivastava S. K., Orbital perturbations and stationkeeping of
communication satellites, J. Spacecraft Rockets 15 (1978) 67–78.
[4] Pocha J. J., in: An Introduction to Mission Design for Geostationary
Satellites, D. Reidel, Dordrecht, 1987, pp. 103–111.
[5] Bassaler P., Colocation strategy in G.E.O. orbit for both Eutelsats
satellites FM1 & FM6, in: Proceeding of InterB.-S. Lee, K.-H. Choi /
Aerosp. Sci. Technol. 4 (2000) 507–515 515 national Symposium Space
Flight Dyanamics, Toulouse,France, S95/027, 1995, pp. 503–518.
[6] Miguel Angel Molina-Cobos, HALO GEO Collocation Method
Analysis, 25th International Symposium on Space Technology and
Science, Tres Cantos, E-28760 Madrid, SPAIN.
[7] Satellite Communication Systems, Techniques and Technology, Fifth
Edition, Gerard Maral - Michel Bousquet, 2009 John Wiley & Sons Ltd.