Details

Autor(en) / Beteiligte

• Yuanxi, Yang
• Ming, Zha
• Lijie, Song
• Ziqing, Wei
• Zhouping, Wang
• Guichong, Ouyang
• Bilin, Xu
• Xiaoping, Wu
• Junqin, Wang

Titel

Combined adjustment project of national astronomical geodetic networks and 2000' national GPS control network

Ist Teil von

• Progress in natural science, 2005-05, Vol.15 (5), p.435-441

Ort / Verlag

Xi'an Research Institute of Surveying and Mapping, Xi'an 710054, China%Xi'an Informational and Technical Center of Surveying and Mapping, Xi'an 710054, China%Zhengzhou Institute of Surveying and Mapping, Zhengzhou 450052, China%The First Surveying Team of Tianjin, Tianjin 300140, China

Erscheinungsjahr

2005

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• P1; 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.