本文選題：2000國家大地坐標系 + 速度場模型�。� 參考：《長安大學》2013年碩士論文

【摘要】：我國2000國家大地坐標系（CGCS2000）已于2008年7月1日正式啟用。由于CGCS2000框架點沒有點位速度場信息，無法反映我國地殼水平運動年變化量，所以不能完整表述我國地心坐標參考框架的動態(tài)性和現(xiàn)勢性，也不能滿足廣大用戶高精度定位的需要。隨著我國GPS連續(xù)運行站點數(shù)量的快速增加，，以及大地測量和地球動力學等學科對基礎地理信息需求的日益增長，建立我國大陸高精度速度場模型已勢在必行。為此，有必要對基于2000國家大地坐標系的中國大陸速度場模型建立方法進行研究和探討。 本文在介紹地心坐標系、國際地球參考系統(tǒng)及框架的基礎上，詳細研究了基于CGCS2000坐標系的中國大陸速度場數(shù)據(jù)的獲取、模型建立方法等一系列問題，取得的研究進展和成果主要有： （1）實現(xiàn)了GPS數(shù)據(jù)處理成果在不同ITRF參考框架及不同歷元下的轉換，為今后數(shù)據(jù)處理成果歸算到我國統(tǒng)一的地心坐標系-CGCS2000提供了解決方案。 （2）以高精度GPS數(shù)據(jù)處理軟件GAMIT/GLOBK為計算平臺，利用2000年-2010年國家GPS連續(xù)運行站及國際IGS站的大量重復觀測數(shù)據(jù)，詳細介紹了中國大陸速度場數(shù)據(jù)的獲取與處理方法，并與中國地殼運動觀測網(wǎng)絡重合點進行分析比較，證明了計算結果的可靠性。 （3）利用該方法獲得的高精度點位成果及速度場數(shù)據(jù)（速度場值N方向精度優(yōu)于±1.6mm/yr，E方向精度優(yōu)于±1.8mm/yr），研究了近十年來國家GPS連續(xù)運行站的變化趨勢及變化量，初步獲得了各個站點的運動趨勢。 （4）將中國大陸簡易劃分成東北、華北、華南、青藏、西北5個塊體，基于克里金插值法、最小二乘配置法、最小二乘配置移動擬合推估法三種方法及速度場數(shù)據(jù)研究了中國大陸速度場模型建立方法，并利用外檢點分析了不同的建模方法在不同的塊體建立速度場的精度情況，得出了初步結論：最小二乘配置法在大部分塊體（華北、華南、東北塊體）的擬合精度都較高，表現(xiàn)穩(wěn)定；克里金插值法在青藏、華北塊體的擬合精度較高；最小二乘配置移動擬合推估法在各個塊體中的表現(xiàn)不如其他方法理想。最終利用克里金插值法與最小二乘配置法獲取了中國大陸1o×1o格網(wǎng)中心點速度場成果，成果差異較小。
[Abstract]:The 2000 National Geodetic coordinate system (CGCS2000) was officially launched on July 1, 2008. Because the CGCS2000 frame points do not have the information of point velocity field and can not reflect the annual variation of crustal horizontal movement in China, the dynamic and present characteristics of the reference frame of geocentric coordinates in China can not be fully expressed. Also can not meet the vast number of users high-precision positioning needs. With the rapid increase of the number of GPS continuous operation stations in China and the increasing demand for basic geographic information in geodesy and geodynamics, it is imperative to establish a high precision velocity field model in China. Therefore, it is necessary to study and discuss the method of establishing Chinese continental velocity field model based on 2000 national geodetic coordinate system. Based on the introduction of the geocentric coordinate system, the international earth reference system and the frame, this paper studies in detail a series of problems, such as the acquisition of the velocity field data of the Chinese mainland based on the CGCS2000 coordinate system, the method of establishing the model, and so on. The main research developments and results achieved are: 1) the conversion of GPS data processing results under different ITRF reference frames and different epochs is realized, which provides a solution for the future data processing results to be calculated to the unified geocentric coordinate system -CGCS2000 in China. Based on the high precision GPS data processing software GAMIT/GLOBK, the acquisition and processing methods of velocity field data in mainland China are introduced in detail by using a large number of repeated observation data from the national GPS continuous operation station and the international IGS station from 2000 to 2010. Compared with the coincidence point of crustal movement observation network in China, the reliability of the calculation results is proved. (3) using the high accuracy point results and velocity field data obtained by this method (the accuracy of N direction of velocity field is better than 鹵1.6 mm / y ~ (r) E direction is better than 鹵1.8 mm / y ~ (rn), the variation trend and quantity of GPS continuous operation station in China in recent ten years have been studied. Initial access to the movement of each site trend. The Chinese mainland is easily divided into five blocks: northeast, South China, Qinghai-Tibet and Northwest, based on the Kriging interpolation method and the least Square collocation method. Three methods of least square collocation moving fitting and estimation method and velocity field data are studied in this paper. The method of establishing velocity field model in Chinese mainland is studied. The accuracy of different modeling methods in different blocks is analyzed by using external points. The results show that the least square collocation method has high fitting accuracy and stable performance in most blocks (North China, South China and Northeast China), and Kriging interpolation method has higher fitting accuracy in Qinghai-Tibet and North China blocks. The least square collocation moving fitting estimation method is not as good as other methods in each block. Finally, the Kriging interpolation method and the least square collocation method are used to obtain the velocity field of the central point of the 1o 脳 1o grid in the mainland of China, and the difference between the results is small.
【學位授予單位】：長安大學
【學位級別】：碩士
【學位授予年份】：2013
【分類號】：P22;P542

【引證文獻】

相關期刊論文 前1條

1 謝方;程傳錄;王斌;馬新瑩;王文利;丁黎;劉璐;李春曉;;基于2000國家大地坐標系的中國大陸速度場獲取[J];地球科學與環(huán)境學報;2014年03期

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1 姜剛;龍門山斷裂帶地殼形變特征及地震斷層參數(shù)反演研究[D];長安大學;2016年

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