短弧长积分法与平均加速度法的比较分析  

Comparison of Short Arc Integral Approach and Average Acceleration Approach in Gravity Field Recovery

作　　者：黄强[1] 范东明[1] 

机构地区：[1]西南交通大学地球科学与环境工程学院,四川成都610031

出　　处：《西南交通大学学报》2013年第3期455-459,480,共6页Journal of Southwest Jiaotong University

基　　金：中央高校基本科研业务费专项资金资助项目(SWJTU12BR012)

摘　　要：为比较短弧长积分法和平均加速度法在卫星重力反演中的效果,用Fortran程序语言分别基于短弧长积分法和平均加速度法编写了2套计算程序,对GOCE(重力场和静态海洋环流探测)卫星精密科学轨道进行了反演计算,得到了2组90阶次的重力场模型Model_Arc(短弧长积分法)和Model_Acc(平均加速度法).结果表明:Model_Acc大地水准面阶误差最大在80阶仅4 cm,而Model_Arc在90阶处达到10 cm;2个模型总体上都比用CHAMP和GRACE卫星的轨道数据反演的模型精度高,Model_Acc在80阶次以前比GO_CONS_GCF_2_TIM_R3精度高,但平均加速度法耗时比短弧长积分法长.In order to compare the short arc integral approach with the average acceleration approach, two Fortran programs were compiled respectively. Two 90 degrees and orders gravity field models, Model_Arc （for the short arc integral approach ） and Model_Acc （for the average acceleration approach）, were recovered based on the programs and GOCE （gravity field and steady-state ocean circulation explorer） orbits. The results show that the maximal geoid error is respectively 4 cm at 80 degrees to the Model_Acc and 10 cm at 90 degrees to the Model_arc, the precisions of the Model_Acc and Model_Arc are higher than those of the models based on CHAMP （challenging mini-satellite payload） and GRACE （gravity recovery and climate experiment） orbits. The superiority of the Model_ Acc over model GO_CONS_GCF 2 TIM_R3 is accuracy before 80 degrees, while the superiority of the Model_Arc over the Model_Acc is consumed time.

关 键 词：短弧长积分法 平均加速度法 重力反演 GOCE(重力场和静态海洋环流探测) 

分 类 号：P223[天文地球—大地测量学与测量工程]