Land Subsidence Monitoring Using GPS Network in Nansha, Guangzhou
1 School of Geosciences and Info-Physics, Central South University, 932 South-Lushan Road,Changsha 410083, China
2 Key Laboratory of Precise Engineering Surveying and Deformation Disaster Monitoring of Hunan Province,
932 South-Lushan Road,Changsha 410083, China
3 Geology Surveying and Mapping Institute of Guangdong Province, 50 Xinjie Street,Guangzhou 510800, China
Abstract：Using three different strategies, we processed the land subsidence monitoring data collected by a mixed set of single-frequency and dual-frequency receivers installed in Nansha, Guangzhou, from July 1, 2012 to December 31, 2013. The result shows that during maximum solar sunspot cycle periods, ionospheric disturbances corrupted the precision of GPS data processing, even with the baselines less than 10 km. GPS measurement precision shows a standard deviation of about 5 mm, which is quite consistent with leveling results.
