时间频率学报
時間頻率學報
시간빈솔학보
JOURNAL OF TIME AND FREQUENCY
2014年
4期
228-233
,共6页
广播星历%混合星座%切比雪夫多项式%拟合精度
廣播星歷%混閤星座%切比雪伕多項式%擬閤精度
엄파성력%혼합성좌%절비설부다항식%의합정도
broadcast ephemeris%hybrid-constellation%Chebyshev polynomial%fitting precision
同步卫星导航试验系统的混合星座主要由GEO和IGSO组成。针对该系统内存在的不同类型卫星轨道及GEO的小倾角、小偏心率问题，设计了一种利用切比雪夫多项式拟合卫星轨道的广播星历方案。对2013年3月的实测轨道数据进行了计算分析，并确定拟合阶数为6阶，拟合弧段长度为30 min，重叠弧段为15 min。计算表明该方案的拟合精度优于1 cm。
同步衛星導航試驗繫統的混閤星座主要由GEO和IGSO組成。針對該繫統內存在的不同類型衛星軌道及GEO的小傾角、小偏心率問題，設計瞭一種利用切比雪伕多項式擬閤衛星軌道的廣播星歷方案。對2013年3月的實測軌道數據進行瞭計算分析，併確定擬閤階數為6階，擬閤弧段長度為30 min，重疊弧段為15 min。計算錶明該方案的擬閤精度優于1 cm。
동보위성도항시험계통적혼합성좌주요유GEO화IGSO조성。침대해계통내존재적불동류형위성궤도급GEO적소경각、소편심솔문제，설계료일충이용절비설부다항식의합위성궤도적엄파성력방안。대2013년3월적실측궤도수거진행료계산분석，병학정의합계수위6계，의합호단장도위30 min，중첩호단위15 min。계산표명해방안적의합정도우우1 cm。
The experimental navigation system of synchronous satellite consists of IGSO satellites and GEO satellites. Due to its hybrid-constellation and GEO′s near-zero-inclination and little eccentricity, the Chebyshev polynomial is adopted to fit the orbits of navigation satellites, thereby a broadcast ephemeris for the experimented navigation system of synchronous satellite is designed. The orbit data measured during March 2013 are calculated and analyzed, and it is determined for the fitting that the polynomial order is set as 6, the fitted segmental arc corresponds to 30minutes and the overlapping arc corresponds to 15minutes. The calculations show that the fitting accuracy for this design is less than 1 cm.
