CAJ | 학술논문

BDS 中 GEO 卫星和 IGSO 卫星的轨道机动现象频繁，其直接影响后续 BDS 定轨定位精度，因而在 BDS 定轨解算前进行准确的轨道机动探测显得尤为重要。针对 BDS 轨道机动问题，本文给出了一种基于广播星历的 BDS 轨道机动探测方法，该方法的基本思路为利用广播星历任意一个参考历元恢复的卫星轨道弧段与其余参考历元恢复的卫星轨道弧段在对应时刻互差的均方根值构建精度判别矩阵，利用判别矩阵元素值与设定阈值进行比较从而判断卫星是否存在机动。数值算例中利用此方法分别对2014年第312、313、314天和2015年第008、009、010天的 BDS 合成的三天广播星历进行轨道机动探测，探测结果表明本文方法可以较好地探测出卫星轨道机动时刻。
BDS 중 GEO 위성화 IGSO 위성적궤도궤동현상빈번，기직접영향후속 BDS 정궤정위정도，인이재 BDS 정궤해산전진행준학적궤도궤동탐측현득우위중요。침대 BDS 궤도궤동문제，본문급출료일충기우엄파성력적 BDS 궤도궤동탐측방법，해방법적기본사로위이용엄파성력임의일개삼고역원회복적위성궤도호단여기여삼고역원회복적위성궤도호단재대응시각호차적균방근치구건정도판별구진，이용판별구진원소치여설정역치진행비교종이판단위성시부존재궤동。수치산례중이용차방법분별대2014년제312、313、314천화2015년제008、009、010천적 BDS 합성적삼천엄파성력진행궤도궤동탐측，탐측결과표명본문방법가이교호지탐측출위성궤도궤동시각。
For BeiDou navigation satellite system (BDS),the orbital maneuver frequencies of GEO satellites and IGSO sat-ellites were high,the precision of precise orbit determination and precise positioning using BDS satellite were affected directly, thus it was particularly important to detect orbital maneuver accurately before the orbit determination. For the problem of BDS satellite orbital maneuver,this article provided a new method,based on broadcast ephemeris,to detect BDS satellites orbital maneuver. The decision matrix was built to judge the satellite orbital maneuver. It was constructed by the RMS value of two groups of all reference epochs positions,which were calculated by any two different reference epochs respectively. What’s more,two groups of three-days broadcast ephemeris were used to detect BDS satellites orbital maneuver with 312 th ,313 th and 314th of 2014 together with 008th ,009 th and 010th day of 2015,Results show that the satellite orbital maneuver can be detected by the proposed method.