本文關(guān)鍵詞： GPS 鐘差 病態(tài)鐘差 二次多項式模型 灰色系統(tǒng)模型 相對論 鐘慢效應(yīng) 引力時間膨脹　出處：《昆明理工大學(xué)》2015年碩士論文　論文類型：學(xué)位論文

【摘要】：GNSS(全球衛(wèi)星導(dǎo)航系統(tǒng))技術(shù)現(xiàn)今已廣泛應(yīng)用于測量技術(shù)應(yīng)用的各個領(lǐng)域,其中的GPS系統(tǒng)由于研發(fā)早,技術(shù)成熟,成為應(yīng)用最為廣泛的技術(shù)。GPS測量中不可避免的含有各類誤差,其中相對論效應(yīng)誤差可由模型化進(jìn)行相當(dāng)程度的扣除。精密單點定位技術(shù)(precise point positioning,PPP)是GPS測量技術(shù)的發(fā)展趨勢,在軌道預(yù)報技術(shù)已滿足要求后,高精度的鐘差預(yù)報已成精密單點定位技術(shù)發(fā)展的一大限制�，F(xiàn)行GPS的鐘差預(yù)報模型有二次多項式模型、灰色系統(tǒng)模型等,這些模型都是在鐘差數(shù)據(jù)本身的分析基礎(chǔ)上建立的。另外,現(xiàn)行相對論效應(yīng)鐘差的改正存在一定缺陷,改正后仍有殘差歸于衛(wèi)星的鐘差當(dāng)中,所以本論文在相對論時間效應(yīng)殘差的產(chǎn)生機(jī)制上展開,構(gòu)建出一個與二次多項式模型、灰色系統(tǒng)模型的建立基礎(chǔ)不同的預(yù)報模型。而后,挑選出的具有足夠精度且鐘差特征各不相同的三顆衛(wèi)星的IGS事后SP3精密星歷為數(shù)據(jù)基礎(chǔ),利用Matlab編寫程序進(jìn)行三個模型的計算,做出為期15天的預(yù)報,并將結(jié)果作對比。最終,本論文得到以下結(jié)論：在所選三顆衛(wèi)星鐘差預(yù)報時長為15天的中短期預(yù)報中,基于相對論效應(yīng)的鐘差預(yù)報模型預(yù)報精度高于灰色系統(tǒng)模型,抗病態(tài)鐘差能力遠(yuǎn)高于二次多項式模型,證明了對于所選三顆衛(wèi)星預(yù)報時長為15天的鐘差預(yù)報,基于相對論效應(yīng)的鐘差預(yù)報模型可行。
[Abstract]:Nowadays, GNSS (Global Satellite Navigation system) technology has been widely used in various fields of measurement technology, among which, GPS system has become the most widely used technology, because of its early development and mature technology, it inevitably contains various kinds of errors. The relativistic effect error can be deducted by modeling. Precise single point positioning technique is the development trend of GPS measurement technology. High precision clock error prediction has become a major limitation of the development of precision single point positioning technology. The current GPS clock error prediction model includes quadratic polynomial model, grey system model, etc. These models are all built on the basis of the analysis of the clock error data itself. In addition, there are some defects in the correction of the current relativistic effect clock errors, after which the residual errors are still attributed to the satellite clock errors. Therefore, in this paper, the mechanism of the relativistic time effect residuals is expanded, and a prediction model is constructed, which is different from the quadratic polynomial model and the grey system model. The IGS hind SP3 precise ephemeris selected from three satellites with enough precision and different clock difference characteristics is used as the data basis. The calculation of the three models is carried out by using the Matlab program, and the forecast lasts 15 days, and the results are compared. In this paper, the following conclusions are drawn: in the medium and short term prediction of the clock difference of the three selected satellites for 15 days, the prediction accuracy of the clock difference prediction model based on relativistic effect is higher than that of the grey system model. The anti-morbid clock error is much higher than the quadratic polynomial model. It is proved that the clock error prediction model based on relativistic effect is feasible for the prediction of the clock difference of the three selected satellites with a duration of 15 days.
【學(xué)位授予單位】：昆明理工大學(xué)
【學(xué)位級別】：碩士
【學(xué)位授予年份】：2015
【分類號】：P228.4

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