Stability test and accuracy analysis of GT-3A airborne gravimeter
Airborne gravity measurement is an important technical means to quickly obtain gravity accel-eration,GT-3A airborne gravimeter is the improved model of GT-2A airborne gravimeter,and its stabil-ity can direct impact on the accuracy of the gravity measurements.Therefore,it is very necessary to carry out static and dynamic tests on GT-3A airborne gravimeter.In order to accurately test the stability of the GT-3 A,this paper uses the same type of airborne gravimeter in the same aircraft during the dynamic tests and compares with the existing lines of GT-2A airborne gravimeter measurements.The results show that the standard deviation of the static observation data from the GT-3A airborne gravimeter tested in this pa-per is 0.22 mGal,it meets the nominal accuracy requirements.The accuracy after leveling the East-West and North-South repeated measurement lines in the dynamic test is 0.728 mGal and 0.692 mGal,respec-tively.The results after leveling with the measurements of the same type of airborne gravimeter flying to-gether with the same aircraft are highly consistent,and the consistency with the GT-2A measurements is good,which comprehensively verifies the stability of the GT-3 A airborne gravimeter.
GT-3A airborne gravimeterairborne gravimetric measuringstatic testdynamic testrepeated line
万方数据
维普
