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

• Published in: Geodesy and Geodynamics Vol. 6; no. 1; pp. 1 - 6
• Main Authors: Shen, Yunzhong, You, Xinzhao, Wang, Jiexian, Wu, Bin, Chen, Junping, Ma, Xiaping, Gong, Xiuqiang
• Format: Journal Article
• Language: English
• Published: Elsevier B.V 2015; KeAi Communications Co., Ltd
• Subjects: Co-located site; Crustal Observation Network of China (CMONOC); Global Navigation satellite system (GNSS); GNSS; Mathematical model; Reference point; Satellite laser ranging (SLR); SLR; Tie vector (TV); Very long baseline interferometry (VLBI); VLBI; 地壳运动观测网络; 数学模型; 矢量; 计算; 领带; Very long baseline interferometry (VLBI); Reference point; Global Navigation satellite system (GNSS); Crustal Observation Network of China (CMONOC); Co-located site; Mathematical model; Tie vector (TV); Satellite laser ranging (SLR)
• ISSN: 1674-9847
• DOI: 10.1016/j.geog.2014.12.001

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.