卫星重力梯度数据重力异常的精度分析

The accuracy analysis of gravity anomaly derived from satellite gravity gradient

针对GOCE卫星确定的地球重力场模型精度的不确定性,对比分析GOCE位模型与多个不同重力场模型确定的重力异常,并将其分别与船测重力数据、南极航空重力数据、北极重力数据以及美国和中国台湾地面重力数据比较研究。结果表明:GOCE位模型的内符合精度最高,与地面重力观测数据符合最优;与船测以及航空重力测量符合相对较差、精度较低。研究表明,在一定精度前提下,GOCE卫星确定的重力数据可用于无人区,从而提高重力观测数据的覆盖率。

Aiming GOCE satellite to determine the Earth＇s gravitational field model accuracy uncer- tainty, comparative analysis GOCE bit model with a number of different gravity field model to determine the gravity anomalies, and gravity data were measured with the ship Antarctic airborne gravity data, the Arctic Gravity data as well as the United States and China＇s Taiwan,ground gravity data comparison, the results showed that. in the GOCE-bit model with the highest accuracy and surface gravity observation data in line with the best; and ship and airborne gravity survey measured in line with the relatively poor, low accuracy. This paper shows that under the premise of a certain precision, GOCE satellite gravity data can be used to determine the no man＇s land, thereby increasing coverage gravity observation data.