本文選題：北斗衛(wèi)星導(dǎo)航系統(tǒng) + 廣播星歷擬合　； 參考：《大地測量與地球動力學(xué)》2017年07期

【摘要】：將無奇點根數(shù)和坐標(biāo)旋轉(zhuǎn)方法綜合運(yùn)用到地球靜止軌道(geostationary earth orbit,GEO)衛(wèi)星的18參數(shù)星歷擬合,解決GEO衛(wèi)星的小偏心率奇點和小傾角奇點問題。基于5顆北斗在軌GEO衛(wèi)星1a的軌道數(shù)據(jù),分析全年星歷擬合精度和穩(wěn)定性,對衛(wèi)星進(jìn)出地影的擬合精度進(jìn)行定量分析,針對Δn參數(shù)超限問題,比較繞X軸旋轉(zhuǎn)5°和55°的Δn參數(shù)變化范圍。結(jié)果表明,2~4h的擬合弧長5顆GEO衛(wèi)星的星歷擬合精度最大為3cm,迭代次數(shù)最多為5次;擬合弧長越長,擬合精度越低,迭代次數(shù)更少;當(dāng)擬合弧段包含進(jìn)出地影軌道時,擬合精度降低;旋轉(zhuǎn)55°比旋轉(zhuǎn)5°Δn參數(shù)的變化范圍減少一個數(shù)量級,Δn參數(shù)全年無超限現(xiàn)象。
[Abstract]:The method of root number and coordinate rotation without singularity is applied to 18 parameter ephemeris fitting of geostationary earth orbito satellite in geostationary orbit to solve the singularity of small eccentricity and the singularity of small inclination angle of GEO satellite.Based on the orbit data of 5 Beidou orbiting GEO satellites, the fitting accuracy and stability of the whole year's ephemeris are analyzed, and the fitting accuracy of the satellite in and out of the earth shadow is quantitatively analyzed, aiming at the problem of 螖 n parameter exceeding the limit.The range of 螖 n parameters of 5 擄and 55 擄rotation around X axis is compared.The results show that the fitting arc length of 5 GEO satellites has the maximum accuracy of 3 cm and the number of iterations is up to 5 times, the longer the fitting arc length, the lower the fitting accuracy and the less the number of iterations.The precision of fitting is reduced, the range of rotation 55 擄is reduced by one order of magnitude than that of rotation 5 擄螖 n, and the 螖 n parameter has no over-limit phenomenon in the whole year.
【作者單位】： 中國科學(xué)院上海天文臺;北京衛(wèi)星導(dǎo)航中心;61876部隊;
【基金】：國家自然科學(xué)基金(41204022,41574029,41274043) 上海市空間導(dǎo)航與定位技術(shù)重點實驗室開放基金(14DZ2276100)~~
【分類號】：P228.4;TN967.1

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本文編號：1773050