Author(s): FAN Baixing, LI Guangyun, LI Peizhen, YI Wangmin, YANG Zaihua, YANG Zhen, Geographical Space Information Institute, Information Engineering University, Henan Province Basic Geographic Information Center, Beijing Satellite Environment Engineering Research Institute
Pages: 222-226+232
Year: 2015 Issue:  2
Journal: Geomatics and Information Science of Wunan University
Keyword:  laser tracker; laser interferometer; 3Dtrilateration network; areal datum;
Abstract: In this research,the precise laser interferometer range of laser tracker alone is used to structure 3Dtrilateration network,so angular error is removed.The adjustment model is the weighted rank defect free-network and the adjustment datum is an areal datum.The approximation parameter of the orientation point coordinates is calculated with angle and distance,and a trilinear surveying method is used to get approximate station coordinates.Moreover,the station and orientation points were calculated precisely using an additional constrained matrix.The results show that the 3Dtrilateration network adjustment model can substantially raise point accuracy.