Pre-processing of the GOCE Satellite Gravity Gradiometry Data

The anticipated scientific objective of the GOCE(Gravity field and steady-state Ocean Circulation Explorer) mission is to determine the global static earth's gravity field with a spatial resolution of half wavelength 70 km,and an accuracy of 1mGal gravity anomaly and of 1-2 cm geoid.The pre-processing of the satellite gravity gradiometry data is one of the most important tasks to the realization of the GOCE scientific goal.For this purpose,the pre-processing scheme of the satellite gravity gradiometry data is presented in the paper.And then the methods of time-variable gravity gradient corrections,outlier detection and external calibration are discussed.Moreover,it will provide the suggestions and guidance to the further study of the pre-processing for the GOCE satellite gravity gradiometry data.