BDS-3 for control surveying application within Africa

doi:10.13474/j.cnki.11-2246.2023.0259

Abstract

Abstract: China's BDS-3 satellite navigation system is capable of global positioning service. Investigation of BDS-3 for control surveying will promote BDS-3 applications in countries along the “Belt and Road”. This paper, for the first time, applies BDS-3 to an engineering survey control network in Equatorial Guinea, Africa. The control network adopts the point-connected E-class network observing strategy. Five sessions and 11 control points are designed in this network with average baseline distance of 3.67～6.25 km. The data processing results using domestic receiver, domestic baseline processing software and domestic adjustment software show that: ①the number of observed Beidou-3 satellite is 8～10 in Equatorial Guinea; ②the overall accuracy of BDS-3 is better than GPS in terms of baseline loop misclosure, three-dimensional unconstrained adjustment and two-dimensional plane constraint adjustment; ③two-dimensional plane coordinates obtained by BDS does not exceed 1.09 cm with respect to those of GPS. This paper verifies that BDS-3 has comparable control surveying performance as GPS in Africa, which provides a valuable reference for BDS-3 control surveying application to the globe.

Key words: BDS-3, control survey, baseline processing, network adjustment, Africa region

CLC Number:

P228

LAI Jinfu, SHI Junbo, HU Xuan, TIAN Kun, OUYANG Chenhao. BDS-3 for control surveying application within Africa[J]. Bulletin of Surveying and Mapping, 2023, 0(9): 25-29,45.

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