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Envisat Radial Orbit Accuracy Assessment

Another measure of the radial orbit accuracy is the internal consistency of the orbit determination method, which is monitored in the following way: Every time a new 5-day orbital arc is available, the first 2 days of this arc will overlap the last 2 days of the previous arc. The comparison is done over the middle (1-day period) of the 2-day overlap. The following plot shows the RMS history of these comparisons.

Notice that starting of October 2002 Doris doppler data for Envisat became available on a routine basis and has been included in the Precise orbit determinaton from then onwards.

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