利用Wenzel加权谱组合法拓展GOCE重力场模型

Extending GOCE Geopotential Model Using Wenzel's Weighted Spectral Combination

根据GOCE和EGM08重力场模型的频谱互补性,利用Wenzel加权谱组合法构建了GOCE和EGM08的组合重力场模型。累积大地水准面误差表明,组合重力场模型具有明显的优势。美国实测GPS/水准检验结果表明,Dir4+EGM08的组合模型精度最高,比EGM08模型精度提高了8%。

Some combined GOCE and EGM08 geopotential models are established using Wenzel＇ s weighted spectral combination approach. Cumulative geoid errors show that combined models have better performance than the EGM08 model alone. Results of geoid differences at GPS/leveling bench- mark in America indicate that a Dir4＋EGM08 combined model has best performance amongst others, enhancing geoid precision up to 8% relative to EGM08 model.