第二類無(wú)奇點(diǎn)根數(shù)的北斗歷書參數(shù)設(shè)計(jì)
發(fā)布時(shí)間:2018-05-03 11:43
本文選題:北斗衛(wèi)星導(dǎo)航系統(tǒng) + 歷書擬合; 參考:《宇航學(xué)報(bào)》2016年11期
【摘要】:為統(tǒng)一北斗三類衛(wèi)星的歷書擬合算法,提出基于第二類無(wú)奇點(diǎn)根數(shù)進(jìn)行歷書參數(shù)設(shè)計(jì)的方法,設(shè)計(jì)了以傾角向量變率作為攝動(dòng)參數(shù)的歷書參數(shù)模型,并給出新的歷書模型的用戶使用算法。利用覆蓋2013年全年的實(shí)際在軌衛(wèi)星的數(shù)值軌道進(jìn)行了歷書擬合試驗(yàn)。結(jié)果表明,地球靜止軌道(GEO)和傾斜地球同步軌道(IGSO)衛(wèi)星的擬合位置誤差為2~4 km,擬合用戶距離誤差(URE)約為1 km,中圓地球軌道(MEO)衛(wèi)星的擬合位置誤差為1~2 km,擬合URE約為500 m。通過(guò)分析6個(gè)軌道根數(shù)和2個(gè)攝動(dòng)參數(shù)全年的變化范圍,對(duì)新歷書模型進(jìn)行量化單位和占用比特位的通信接口設(shè)計(jì),定量分析量化單位對(duì)歷書表達(dá)精度的影響。結(jié)果表明,參數(shù)截?cái)嗪髮?duì)位置誤差的影響小于50 m,對(duì)URE誤差的影響小于5 m。因此,歷書量化誤差對(duì)信號(hào)捕獲以及首次定位時(shí)間帶來(lái)的影響可以忽略不計(jì)。
[Abstract]:In order to unify the almanac fitting algorithm of the three kind of Beidou satellite, a method based on the second classes of no odd point root number is proposed. The almanac parameter model with the variable rate of tilt vector is designed as the perturbation parameter, and the new ALMANAC model is given by the user. The numerical orbit of the actual on orbit satellite in 2013 is covered. The fitting position error of the geostationary orbit (GEO) and the tilted geostationary orbit (IGSO) satellite is 2~4 km, the fitting user distance error (URE) is about 1 km, the fitting position error of the middle circle earth orbit (MEO) satellite is 1~2 km, and the fitting URE is about 500 m. through the analysis of 6 orbital roots and 2 perturbation parameters. The change range of the whole year, the design of the communication interface between the quantitative unit and the occupancy bit of the new calendar model, the quantitative analysis of the influence of the quantized unit on the accuracy of the almanac expression. The results show that the effect of the parameter truncation on the position error is less than 50 m, and the influence on the URE error is less than 5 m., so the quantitative error of the almanac is captured and first of the first signal. The impact of the sub location time can be ignored.
【作者單位】: 中國(guó)科學(xué)院上海天文臺(tái);北京衛(wèi)星導(dǎo)航中心;信息工程大學(xué)導(dǎo)航與空天目標(biāo)工程學(xué)院;國(guó)防大學(xué);
【基金】:國(guó)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(diǎn)實(shí)驗(yàn)室基金(14DZ2276100)
【分類號(hào)】:V412.41
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