GT-2A航空重力仪精度评定

摘要

选择地形平坦的实验区A和地形起伏较大的实验区B,采用GT-2A航空重力测量数据和高精度地面重力测量数据,依据测线网交叉点平差方法评定GT-2A航空重力仪的内符合精度,通过地面重力与航空重力延拓结果的比对实验评定其外符合精度.结果表明,GT-2A重力扰动测量结果的内符合精度优于1 mGal,外符合精度在实验区A优于2 mGal,在实验区B优于3 mGal.%Our research is based on the airborne gravity data from GT-2A gravimeter and the high-precision ground gravity data collected in two areas,marked as A,which is flat,and B,which is steep.We calculate the internal precision of GT-2A gravimeter by network crossover adjustment,and evaluate its external precision by comparing the continuation results of airborne and ground gravity data.The results show that the inner precision of GT-2A gravimeter is less than 1 mGal,while its external precision is less than 2 mGal in zone A,and 3 mGal in zone B.