Satellite Orbit and Ephemeris Determination using Inter Satellite Links

Simulations and ResultsInter Satellite Links6.2.8.2 Ground and Intersatellite Tracking (Full Network)The following scenario has been processed using all available types of inter satellite links, butlimiting the number of simultaneous ISL's to 6. It can be seen that orbit detereminationaccuracy is improved well below 10 cm in radial direction for both types of satellites. Thefollowing picture show the accuracy figure for the MEO satellites.Radial Error [cm] 1998 07 02 01:12 - 1998 07 07 13:12Radial Std. Dev. [cm] 1998 07 02 01:12 - 1998 07 07 13:127.06.0-7.003.0[h]32 64 96 1280[h]31 62 93 124Along Track Error [cm] 1998 07 02 01:12 - 1998 07 07 13:12Along Track Std. Dev. [cm] 1998 07 02 01:12 - 1998 07 07 13:128.08.0-8.004.0[h]32 64 96 1280[h]31 62 93 124Cross Track Error [cm] 1998 07 02 01:12 - 1998 07 07 13:12Cross T rack Std. Dev. [cm] 1998 07 02 01:12 - 1998 07 07 13:127.016.0-7.008.0[h]32 64 96 1280[h]31 62 93 124Figure 6-38 Tracking Accuracy of MEO using ISL'sThe next picture shows the accuracy figure for the GEO satellites. Radial accuracy is nearlyas good as for the MEO, only the tangential accuracy is slightly worse.Page 134R. Wolf