本文選題：精密定軌　切入點(diǎn)：雙頻GPS　出處：《大地測量與地球動(dòng)力學(xué)》2017年09期

【摘要】：對Tianhui-1C衛(wèi)星的星載雙頻GPS數(shù)據(jù)進(jìn)行質(zhì)量分析,利用偽隨機(jī)脈沖方法進(jìn)行簡化動(dòng)力學(xué)定軌,采用重疊弧段比較法對其精密定軌精度進(jìn)行初步分析,并從理論上分析星載GPS接收機(jī)由單頻改為雙頻對測圖精度的影響。實(shí)驗(yàn)表明,Tianhui-1C衛(wèi)星的星載GPS觀測數(shù)據(jù)完整率優(yōu)于80%,周跳比優(yōu)于47,L1頻點(diǎn)的多路徑誤差約0.22m,L2頻點(diǎn)的多路徑誤差約0.23m,LC組合觀測值的驗(yàn)后殘差RMS優(yōu)于9.7mm。采用軌道重疊弧段比較法對兩個(gè)時(shí)段共48h的星載GPS數(shù)據(jù)進(jìn)行精密定軌精度比較,三維精度優(yōu)于3.65cm。定軌精度的提高,可使無地面點(diǎn)控制條件下等高線間距(CI)精度提高3.866m,高程誤差提高1.171m。
[Abstract]:The quality analysis of Tianhui-1C satellite dual-frequency GPS data is carried out, the pseudo-random pulse method is used to simplify the dynamic orbit determination, and the overlap arc comparison method is used to analyze the precision of orbit determination.The influence of spaceborne GPS receiver from single frequency to dual frequency on mapping accuracy is analyzed theoretically.The experimental results show that the complete rate of spaceborne GPS observation data of Tianhui-1C satellite is better than that of 80mm, and the multipath error of the multipath error of 0.22mL2 frequency is 0.22mL2 and the residual error RMS of the combined observations is better than 9.7mm.The orbit overlap arc comparison method is used to compare the precision of orbit determination of spaceborne GPS data with two periods of 48 hours. The 3D accuracy is better than 3.65 cm.The accuracy of orbit determination can be increased by 3.866 m and the elevation error by 1.171 m under the condition of no ground point control.
【作者單位】： 西安航天天繪數(shù)據(jù)技術(shù)有限公司;宇航動(dòng)力學(xué)國家重點(diǎn)實(shí)驗(yàn)室;中國西安衛(wèi)星測控中心;
【基金】：國家自然科學(xué)基金(11503096) 宇航動(dòng)力學(xué)國家重點(diǎn)實(shí)驗(yàn)室開放基金(2016ADL-DW0101)~~
【分類號】：P228

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