發(fā)布時間：2018-06-10 06:20

  本文選題：星載GPS + 非差��； 參考：《計算機(jī)工程與科學(xué)》2011年05期

【摘要】：星載GPS非差運動學(xué)定軌結(jié)果容易受到觀測數(shù)據(jù)質(zhì)量的影響,相位觀測噪聲遠(yuǎn)遠(yuǎn)小于偽碼,如果將兩種觀測數(shù)據(jù)等權(quán)處理,會降低相位信息在參數(shù)解算中的作用;相位觀測存在模糊,單獨使用會導(dǎo)致參數(shù)估計結(jié)構(gòu)不穩(wěn)定;偽碼觀測噪聲與接收天線高度角存在很強(qiáng)的相關(guān)性。本文根據(jù)星載GPS偽碼和相位聯(lián)合非差運動學(xué)定軌原理,結(jié)合GPS觀測數(shù)據(jù)質(zhì)量分析結(jié)果,提出了一種合理的加權(quán)策略,提高了星載GPS非差運動學(xué)定軌的精度和穩(wěn)定性。對一個星期的CHAMP的觀測數(shù)據(jù)進(jìn)行處理,將非差運動學(xué)定軌結(jié)果與GFZ事后科學(xué)軌道進(jìn)行對比,結(jié)果表明二者在R、T、N分量上差值的均方根為20cm、12cm、13cm,三維點位誤差的均方根為27cm。通過分析多種不同加權(quán)策略的定軌精度差異,驗證了本文提出的加權(quán)策略的有效性。
[Abstract]:The result of the satellite borne GPS non differential kinematics is easily affected by the quality of the observed data, and the phase observation noise is far less than the pseudo code. If the two kinds of observational data are processed, the function of the phase information in the parameter calculation will be reduced; the phase observation is blurred, and the structure of the parameter estimation is unstable by the single use, and the pseudo code observation noise is used. There is a strong correlation between the receiving antenna height angle. In this paper, based on the principle of spaceborne GPS pseudo code and phase joint non differential kinematics, combining with the results of GPS observation data quality analysis, a reasonable weighting strategy is proposed to improve the accuracy and stability of the spaceborne GPS non differential kinematic fixed orbit determination. The observation data of CHAMP for a week are carried out. The results show that the root mean square of the difference between the two R, T, and N components is 20cm, 12cm, 13cm, and the root mean square of the three-dimension point error is the difference between the fixed orbit accuracy of a variety of different weighting strategies, which verifies the validity of the weighted strategy proposed in this paper.
【作者單位】： 國防科學(xué)技術(shù)大學(xué)理學(xué)院;
【基金】：國防預(yù)研基金項目(9140A22040508KG01) 航天支撐技術(shù)基金項目(2006-HT-GFKD)
【分類號】：P139

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本文編號：2002265