Study on Signal-In-Space Errors Calculation Method and Statistical Characterization of BeiDou Navigation Satellite System

摘要

BeiDou Navigation Satellite System (BDS), currently including valid 14 in-orbit satellites-5GEOs, 5IGSOs and 4MEOs, had provided formal operation service in the late of 2012. Different type BeiDou satellite's Signal-In-Space Range Errors (SISRE) calculation formulation is derived in this paper according to navigation satellite's Signal-In-Space Range Errors definition. SISRE of Different type BeiDou satellites are assessed and analyzed on the basis of this SISRE calculation formulation by using broadcast ephemeris data and precise orbit products from January to October, 2012 (day of year 001-303, 2012). The results show: the broadcast ephemeris orbit accuracy of BeiDou system non-GEO satellites is better than GEO satellites; the accuracy of BeiDou satellites broadcast ephemeris orbit errors in radial direction, GEO is better than 1.5 m and non-GEO is better than 1.0 m, is the best; the average of GEO satellites rms Signal-In-Space Range errors including orbit errors only is better than 2.0 m, while non-GEOs is better than 0.8 m.