Mathematical model for computing precise local tie vectors for CMONOC co-located GNSS/VLBI/SLR stations  

作　　者：Shen Yunzhong You Xinzhao Wang Jiexian Wu Bin Chen Junping Ma Xiaping Gong Xiuqiang 

机构地区：[1]College of Surveying and Geo-informatics, Tongji University [2]National Earthquake Infrastructure Service, China Earthquake Administration [3]Shanghai Astronomical Observatory, Chinese Academic of Science

出　　处：《Geodesy and Geodynamics》2015年第1期1-6,共6页大地测量与地球动力学（英文版）

基　　金：sponsored by the Crustal Movement Observation Network of China(CMONOC);partially supported by the Natural Science Foundation of China(41274035,41174023)

摘　　要：The seven co-located sites of the Crustal Movement Observation Network of China（CMONOC） in Shanghai, Wuhan, Kunming, Beijing, Xi＇an, Changchun, and Urumqi are equipped with Global Navigation Satellite System（GNSS）, very long baseline interferometry（VLBI）, and satellite laser ranging（SLR） equipment. Co-location surveying of these sites was performed in 2012 and the accuracies of the solved tie vectors are approximately 5 mm.This paper proposes a mathematical model that handles the least squares adjustment of the 3D control network and calculates the tie vectors in one step, using all the available constraints in the adjustment. Using the new mathematical model, local tie vectors can be more precisely determined and their covariance more reasonably estimated.The seven co-located sites of the Crustal Movement Observation Network of China（CMONOC） in Shanghai, Wuhan, Kunming, Beijing, Xi＇an, Changchun, and Urumqi are equipped with Global Navigation Satellite System（GNSS）, very long baseline interferometry（VLBI）, and satellite laser ranging（SLR） equipment. Co-location surveying of these sites was performed in 2012 and the accuracies of the solved tie vectors are approximately 5 mm.This paper proposes a mathematical model that handles the least squares adjustment of the 3D control network and calculates the tie vectors in one step, using all the available constraints in the adjustment. Using the new mathematical model, local tie vectors can be more precisely determined and their covariance more reasonably estimated.

关 键 词：Co-located site Tie vector（TV） Reference point Global Navigation satellite system（GNSS） Very long baseline interferometry（VLBI） 

分 类 号：P228[天文地球—大地测量学与测量工程]