A New Hybrid Processing Strategy to Improve Temporal Gravity Field Solution

A New Hybrid Processing Strategy to Improve Temporal Gravity Field Solution
复制标题

改进时间重力场解决方案的新混合处理策略

DOI:
10.1029/2019jb017752
复制
发表时间:
2019-08
期刊:
Journal of Geophysical Research: Solid Earth
影响因子:
--
通讯作者:
Luo Zhicai
Luo Zhicai
中科院分区:
其他
文献类型:
--
作者:
Zhou Hao;Zhou Zebing;Luo Zhicai

文献摘要

参考文献

被引文献

相似文献

如何达到发射前基线精度仍然是重力恢复与气候实验(GRACE)时间重力场模型确定的关键问题之一。在这项工作中,两个混合处理策略,以提高GRACE时间解决方案的准确性。一种是运动学经验参数,另一种是弧特定参数。将这两种混合处理策略与滤波预定策略(FPS)和纯预定策略(PPS)进行了比较。通过闭环仿真研究进行评估,结果证明了我们的混合处理策略的卓越性能。利用GRACE 1B级重力场数据,采用混合处理策略分别确定了GRACE月重力场模型HUST‐FPS‐PPS和HUST‐ Grace 2019,并与单独解HUST‐FPS和HUST‐PPS进行了比较。对比结果表明:(1)对于运动学经验参数,混合处理策略在保留时间信号的同时,也降低了噪声水平。例如,亚马逊河流域的年振幅为HUST-PPS为16.0 cm,HUST-FPS为19.1 cm,HUST-FPS-PPS为19.4 cm。相比之下,与HUST-PPS和HUST-FPS相比,HUST-FPS-PPS的累积大地水准面差分别减少了11%和26%。(2)对于特定于弧的参数,混合处理策略也显著改善了恢复的月度解。与空间研究中心RL 05和HUST‐FPS‐PPS相比,HUST‐ Grace 2019的累积大地水准面差减少了19%和12%。空间域的比较结果也支持了我们的结论。这项工作的混合处理策略可能适用于GRACE后续数据。
The way to reach the prelaunch baseline accuracy is still one of crucial issues for Gravity Recovery and Climate Experiment (GRACE) temporal gravity field model determination. In this work, two hybrid processing strategies are developed to improve the accuracy of GRACE temporal solution. One is for kinematic empirical parameters, the other is for arc‐specific parameters. These two hybrid processing strategies are compared with two solely processing strategies including filter predetermined strategy (FPS) and pure predetermined strategy (PPS). Assessing with a closed‐loop simulation study, the results demonstrate the outperformance of our hybrid processing strategies. Using GRACE Level 1B data, the GRACE monthly gravity field models HUST‐FPS‐PPS and HUST‐Grace2019 are, respectively, determined with the hybrid processing strategies, and they are compared with the solely solutions HUST‐FPS and HUST‐PPS. The comparison results demonstrate that (1) as for the kinematic empirical parameter, the hybrid processing strategy can retain the temporal signal but also reduce the noise level. For instance, the annual amplitudes over Amazon River Basin are 16.0 cm for HUST‐PPS, 19.1 cm for HUST‐FPS, and 19.4 cm for HUST‐FPS‐PPS. In contrast, the cumulative geoid difference of HUST‐FPS‐PPS reduces by 11% and 26%, when compared to HUST‐PPS and HUST‐FPS. (2) As for the arc‐specific parameters, the hybrid processing strategy also significantly improves the recovered monthly solution. Compare with Center for Space Research RL05 and HUST‐FPS‐PPS, the cumulative geoid difference of HUST‐Grace2019 reduces by 19% and 12%. The comparison results in spatial domain also support our conclusions. The hybrid processing strategy of this work is likely applicable for GRACE Follow‐On data.
DOI: 10.1007/s00190-010-0414-2
发表时间: 2010-05
期刊: Journal of Geodesy
影响因子: 4.4
作者:
M. Horwath;J. Lemoine;R. Biancale;S. Bourgogne
通讯作者: M. Horwath;J. Lemoine;R. Biancale;S. Bourgogne
DOI: 10.1016/j.rse.2016.03.030
发表时间: 2016-08
影响因子: 13.5
作者:
N. Tangdamrongsub;P. Ditmar;S. Steele‐Dunne;B. Gunter;E. Sutanudjaja
通讯作者: N. Tangdamrongsub;P. Ditmar;S. Steele‐Dunne;B. Gunter;E. Sutanudjaja
通过对非保守加速度和姿态观测误差建模改进的 GRACE 月重力场解
DOI: 10.1007/s00190-016-0889-6
发表时间: 2016
期刊: Journal of Geodesy
影响因子: 4.4
作者:
Chen Qiujie;Shen Yunzhong;Chen Wu;Zhang Xingfu;Hsu Houze
通讯作者: Hsu Houze
DOI: 10.1029/2018jb015556
发表时间: 2018-11
期刊: Journal of Geophysical Research: Solid Earth
影响因子: --
作者:
Hao Zhou;Zhicai Luo;Zebing Zhou;Qiong Li;Bo Zhong;Biao Lu;Houze Hsu
通讯作者: Houze Hsu
DOI: 10.1093/gji/ggw081
发表时间: 2016-05
影响因子: 2.8
作者:
U. Meyer;A. Jäggi;Yoomin Jean;G. Beutler
通讯作者: U. Meyer;A. Jäggi;Yoomin Jean;G. Beutler