本文選題：北斗衛(wèi)星導(dǎo)航系統(tǒng) + 星上多徑　； 參考：《測(cè)繪科學(xué)技術(shù)學(xué)報(bào)》2017年01期

【摘要】：通過引入北斗星上多徑參數(shù),量化了北斗星上多徑對(duì)寬巷模糊度解算的影響;從理論上分析了該影響量在非差、單差和雙差條件下的特性,并采用零基線、短基線和長(zhǎng)基線3組實(shí)測(cè)數(shù)據(jù)進(jìn)行了分析與驗(yàn)證。結(jié)果表明:星上多徑對(duì)非差寬巷模糊度估值的影響在三類衛(wèi)星上表現(xiàn)出不同的特性,在MEO衛(wèi)星上最大,可達(dá)1周;星間單差無(wú)法消除星上多徑偏差影響,進(jìn)而PPP寬巷模糊度的解算將受到影響;星上多徑不會(huì)對(duì)零基線雙差寬巷模糊度解算造成影響,對(duì)短基線雙差寬巷模糊度解算的影響也可忽略,但長(zhǎng)基線雙差寬巷模糊度解算則受嚴(yán)重影響;星上多徑會(huì)導(dǎo)致長(zhǎng)基線雙差寬巷模糊度平滑收斂緩慢,經(jīng)改正后模糊度固定成功率能夠顯著提高,單歷元取整成功率從52.7%提升到61.4%,平滑20個(gè)歷元模糊度固定成功率即可從68.4%提升到95.5%。
[Abstract]:Through the introduction of the multipath parameters on the Beidou star, the influence of the multipath on the ambiguity resolution of the wide alley is quantified. The characteristics of the effect under the conditions of non difference, single difference and double difference are analyzed theoretically, and the 3 groups of measured data are analyzed and verified with zero baseline, short baseline and long baseline. The effect of paste estimation has different characteristics on the three types of satellites, the maximum of the MEO satellite, up to 1 weeks; the INTERSTAR single difference can not eliminate the influence of the multipath deviation on the star, and then the calculation of the ambiguity resolution of the PPP wide lane will be affected; the multipath on the star will not affect the ambiguity resolution of the zero baseline double difference width lane, and the ambiguity of the short baseline double difference width Lane The effect of the calculation can also be ignored, but the ambiguity resolution of the long baseline double difference wide lane is seriously affected. The multipath on the satellite will lead to the slow convergence of the long baseline double difference width, and the success rate of the fixed fuzzy degree can be greatly improved after the correction. The success rate of the single epoch is raised from 52.7% to 61.4%, and the success rate of the 20 epoch ambiguity is fixed. Can be promoted from 68.4% to 95.5%.
【作者單位】： 信息工程大學(xué);地理空間信息國(guó)家重點(diǎn)實(shí)驗(yàn)室;北京衛(wèi)星導(dǎo)航中心;
【基金】：國(guó)家自然科學(xué)基金項(xiàng)目(41020144004A;41374019;41474015) 國(guó)家863計(jì)劃項(xiàng)目(2013AA122501)
【分類號(hào)】：P228.4

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本文編號(hào)：1980737