發(fā)布時間：2018-04-01 02:26

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

【摘要】：對Tianhui-1C衛(wèi)星的星載雙頻GPS數(shù)據(jù)進行質量分析,利用偽隨機脈沖方法進行簡化動力學定軌,采用重疊弧段比較法對其精密定軌精度進行初步分析,并從理論上分析星載GPS接收機由單頻改為雙頻對測圖精度的影響。實驗表明,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頻點的多路徑誤差約0.22m,L2頻點的多路徑誤差約0.23m,LC組合觀測值的驗后殘差RMS優(yōu)于9.7mm。采用軌道重疊弧段比較法對兩個時段共48h的星載GPS數(shù)據(jù)進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)技術有限公司;宇航動力學國家重點實驗室;中國西安衛(wèi)星測控中心;
【基金】：國家自然科學基金(11503096) 宇航動力學國家重點實驗室開放基金(2016ADL-DW0101)~~
【分類號】：P228

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本文編號：1693578