| Combined adjustment project of national astronomical geodetic networks and 2000'''' national GPS control network |
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| 引用本文： | YANG Yuanxi1*,ZHA Ming2,SONG Lijie3,WEI Ziqing1,WANG Zhouping2,OUYANG Guichong2,XU Bilin2,WU Xiaoping3 and WANG Junqin4(1. Xi''''an Research Institute of Surveying and Mapping,Xi''''an 710054,China, 2. Xi''''an Informational and Technical Center of Surveying and Mapping,Xi''''an 710054,China, 3. Zhengzhou Institute of Surveying and Mapping,Zhengzhou 450052,China, 4. The First Surveying Team of Tianjin,Tianjin 300140,China). Combined adjustment project of national astronomical geodetic networks and 2000'''' national GPS control network[J]. 自然科学进展(英文版), 2005, 15(5). DOI: 10.1080/10020070512331342360 |
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| 作者姓名： | YANG Yuanxi1* ZHA Ming2 SONG Lijie3 WEI Ziqing1 WANG Zhouping2 OUYANG Guichong2 XU Bilin2 WU Xiaoping3 and WANG Junqin4(1. Xi''''an Research Institute of Surveying and Mapping Xi''''an 710054 China 2. Xi''''an Informational and Technical Center of Surveying and Mapping Xi''''an 710054 China 3. Zhengzhou Institute of Surveying and Mapping Zhengzhou 450052 China 4. The First Surveying Team of Tianjin Tianjin 300140 China) |
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| 作者单位： | 1. Xi'an Research Institute of Surveying and Mapping，Xi'an 710054，China; 2. Xi'an Informational and Technical Center of Surveying and Mapping，Xi'an 710054，China; 3. Zhengzhou Institute of Surveying and Mapping，Zhengzhou 450052，China; 4. The First Surveying Team of Tianjin，Tianjin 300140，China |
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| 摘 要： | The combined adjustment of astronomical geode tic networks and the 2000’national GPS control net work is a national geodetic project based on the pre sent necessities and long term program of national e conomic development. This project has profound sci entific, social and economic significance, and willproduce an effect on developments of space scienceand national defense construction as well as geodesyitself.China took part in the second international radioobservational projec…
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Combined adjustment project of national astronomical geodetic networks and 2000'''' national GPS control network |
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| YANG Yuanxi,ZHA Ming,SONG Lijie,WEI Ziqing,WANG Zhouping,OUYANG Guichong,XU Bilin,WU Xiaoping,Wang Junqin. Combined adjustment project of national astronomical geodetic networks and 2000'''' national GPS control network[J]. Progress in Natural Science, 2005, 15(5). DOI: 10.1080/10020070512331342360 |
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| Authors: | YANG Yuanxi ZHA Ming SONG Lijie WEI Ziqing WANG Zhouping OUYANG Guichong XU Bilin WU Xiaoping Wang Junqin |
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| Abstract: | The combined adjustment project of the nationwide astronomical geodetic networks and 2000 ' national GPS control network involve 48519 terrestrial observational stations and 2666 GPS observational stations. In the terrestrial network, 25107 stations are height fixed and 23412 stations are in three dimensions. 440793 terrestrial observations and 183668 unknowns are involved in the adjustment. The three-dimensional observational models for the adjustment have been established. The crustal deformation influences and corrections are researched. Fast methods of solving partitioned adjustment for super large-scale geodetic network have been studied. The standard deviations of three-dimensional coordinates for all stations are evaluated. As a result of the combined adjustment, a unified national geodetic network with nearly 50000 stations is established, the high accurate three-dimensional geocentric coordinates are obtained. The standard deviation for geoid is averagely 0.2 m, for vertical deflection is about 1.5", for the horizontal position is about 0.12 m, for the geodetic height is about 0.14 m, and for the three-dimensional position is averagely 0.3 m. |
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| Keywords: | astronomical geodetic network GPS network combined adjustment datum geocentric coordinates |
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