Satellite Orbit and Ephemeris Determination using Inter Satellite Links
Satellite Orbit and Ephemeris Determination using Inter Satellite Links Satellite Orbit and Ephemeris Determination using Inter Satellite Links
Simulations and ResultsInter Satellite Links6.2.5.2 Ground Tracking with Reduced NetworkIf the network is reduced (Galileo network), the accuracy gets degraded. as can be seen fromthe following figure.Radial Error [cm] 1998 07 02 07:48 - 1998 07 10 13:4880.040.0Radial Std. Dev. [cm] 1998 07 02 07:48 - 1998 07 10 13:4864.0032.0-40.0-80.0[h]47 94 141 1880[h]46 92 138 184Along Track Error [cm] 1998 07 02 07:48 - 1998 07 10 13:48228.0114.0Along Track Std. Dev. [cm] 1998 07 02 07:48 - 1998 07 10 13:48240.00120.0-114.0-228.0[h]47 94 141 1880[h]46 92 138 184Cross Track Error [cm] 1998 07 02 07:48 - 1998 07 10 13:4856.028.0Cross T rack Std. Dev. [cm] 1998 07 02 07:48 - 1998 07 10 13:4826.0013.0-28.0-56.0[h]47 94 141 1880[h]46 92 138 184Figure 6-31 Tracking Accuracy of a LEO using Galileo NetworkPage 126R. Wolf
Inter Satellite LinksSimulations and Results6.2.5.3 Ground and Intersatellite Tracking (Reduced Network)An accuracy even better as with a large scale ground network can be achieved by introducinginter satellite links. Accuracy is improved by a factor of two in all direction, with respect tothe ground tracking.Radial Error [cm] 1998 07 01 14:59 - 1998 07 02 20:5928.0Radial Std. Dev. [cm] 1998 07 01 14:59 - 1998 07 02 20:5914.012.0-14.006.0-28.0[h]7 14 21 280[h]7 14 21 28Along Track Error [cm] 1998 07 01 14:59 - 1998 07 02 20:5924.0Along Track Std. Dev. [cm] 1998 07 01 14:59 - 1998 07 02 20:5912.08.0-12.004.0-24.0[h]7 14 21 280[h]7 14 21 28Cross Track Error [cm] 1998 07 01 14:59 - 1998 07 02 20:5910.0Cross T rack Std. Dev. [cm ] 1998 07 01 14:59 - 1998 07 02 20:595.04.0-5.002.0-10.0[h]7 14 21 280[h]7 14 21 28Figure 6-32 Tracking Accuracy of LEO using Ground and Intersatellite TrackingR. Wolf Page 127
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Simulations <strong>and</strong> Results<strong>Inter</strong> <strong>Satellite</strong> <strong>Links</strong>6.2.5.2 Ground Tracking with Reduced NetworkIf the network is reduced (Galileo network), the accuracy gets degraded. as can be seen fromthe following figure.Radial Error [cm] 1998 07 02 07:48 - 1998 07 10 13:4880.040.0Radial Std. Dev. [cm] 1998 07 02 07:48 - 1998 07 10 13:4864.0032.0-40.0-80.0[h]47 94 141 1880[h]46 92 138 184Along Track Error [cm] 1998 07 02 07:48 - 1998 07 10 13:48228.0114.0Along Track Std. Dev. [cm] 1998 07 02 07:48 - 1998 07 10 13:48240.00120.0-114.0-228.0[h]47 94 141 1880[h]46 92 138 184Cross Track Error [cm] 1998 07 02 07:48 - 1998 07 10 13:4856.028.0Cross T rack Std. Dev. [cm] 1998 07 02 07:48 - 1998 07 10 13:4826.0013.0-28.0-56.0[h]47 94 141 1880[h]46 92 138 184Figure 6-31 Tracking Accuracy of a LEO <strong>using</strong> Galileo NetworkPage 126R. Wolf