Abstract:The high-precision and high-resolution earth gravity field can be used to unify the global height datum and determine the geoid. So, it is very important to estimate the accuracy of the gravity field model and various gravity quantities (such as height anomaly). Based on VS2015 + Intel XE 2016 platform and OpenMP parallel technologies, we develop EGMTools software for gravity field model evaluation and gravity quantities calculation. The main functions of EGMTools include: 1) estimating the accuracy of the gravity field model truncated to any degree/order by using measured data such as gravity anomaly, height anomaly, deflection of vertical data and so on; 2) calculating gravity anomaly, height anomaly, deflection of vertical data and other gravity quantities of points or grid (SRTM topographic surface) using the gravity field model; 3) comparing the gravity quantities (such as height anomaly) represented by different gravity field models according to a certain grid interval on a global scale; 4) converting gravity field model format, analyzing degree variance and data preprocessing for RTM gravity quantities calculation.
CHEN Jianhua,ZHANG Xingfu,CHEN Qiujie et al. EGMTools: Software for Gravity Field Model Estimation and Gravity Quantities Calculation[J]. jgg, 2020, 40(11): 1139-1144.