为避免加速度计校准过度参数化,对加速度计的尺度和偏差进行每月一次和每天一次的校正,综合考虑了轨道数据、星间距离变化率、姿态数据和加速度计数据的观测误差,发展了短弧积分法。基于改进的短弧积分法,利用2003-01至2016-07期间的GRACE卫星数据(包括加速度计数据、姿态数据和星间距离变率数据)和几何轨道数据解算得到180阶次无约束静态重力场模型Tongji-Grace02s,进一步对高阶位系数进行正则化约束处理得到Tongji-Grace02k。
联系人:陈秋杰教授(qiujiechen@tongji.edu.cn)
1 相关Tongji-Grace02s模型数据下载可点击链接:https://workdrive.zohopublic.com.cn/external/1fdcb08e58115c4755a10de21d17b42836eda1282bce0a113b0e11a5037b734b.
2 相关Tongji-Grace02k模型数据下载可点击链接:https://workdrive.zohopublic.com.cn/external/b54e08a9a994d95adf57e12c97cfc1804b3eb003cb7d52acec8594ffa42b824a.
若下载使用此模型数据,请引用以下参考文献,其提供了该模型相关解算方法等详细信息。
Chen Q, Shen Y, Francis O, Chen W, Zhang X, Hsu H.(2018). Tongji-Grace02s and Tongji-Grace02k: high-precision static GRACE-only global Earth's gravity field models derived by refined data processing strategies. Journal of Geophysical Research: Solid Earth,123(7): 6111-6137.
Chen Q, Shen Y, Chen W, Zhang X, Hsu H, (2016). An improved GRACE monthly gravity field solution by modelling the non-conservative acceleration and attitude observation errors. Journal of Geodesy, 90(6),503-523.
Chen Q, Shen Y, Zhang X, Hsu H, Chen W, Ju X, Lou L, (2015). Monthly gravity field models derived from GRACE Level 1B data using a modified short-arc approach. Journal of Geophysical Research: Solid Earth, 120(3), 1804-1819.