Abstract:This paper introduces the first phase of the project of the construction of the national infrastructure absolute gravity observation modern surveying benchmark system in 2013-2014 by A10/028 and FG5/214 gravimeters. The measured results are analyzed, showing that the absolute gravity observation precision and difference is 5 μGal, meeting the requirements of high precision gravity base construction. The results also show that A10/028 is adaptable to field observations of gravity changes, that FG5/214 signal acquisition has advantages, and that using two sets of absolute gravimeter data in the same periodim proves the accuracy of observation results.
HE Zhitang,KANG Shengjun,HE Xiaoming et al. First Phase of the Construction of the National Modern Surveying BenchmarkSystem Infrastructure Absolute Gravity Observation[J]. jgg, 2017, 37(7): 747-751.