Pre-processing of the GOCE Satellite Gravity Gradiometry Data
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摘要: GOCE(gravity field and steady-state ocean circulation explorer)计划的主要科学目标是以70 km空间分辨率1、mGal重力异常和1~2 cm大地水准面的精度测定全球静态地球重力场,卫星重力梯度测量数据的预处理是实现这一预期科学目标的重要任务之一。讨论了重力梯度测量数据的预处理方案、时变重力场信号改正、粗差探测和外部校准方法,为进一步开展GOCE卫星重力梯度测量数据的预处理研究提供参考和具体建议。Abstract: 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.
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Keywords:
- GOCE /
- satellite gravity gradiometry /
- pre-processing /
- outlier detection /
- external calibration
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