GRACE RL06与RL05时变重力场模型数据初步比较分析  

Preliminary Comparative Analysis of GRACE RL06 and RL05 Time-Variable Gravity Models

作　　者：郭飞霄[1,2,3] 孙中苗 任飞龙 肖云[2,3] GUO Feixiao;SUN Zhongmiao;REN Feilong;XIAO Yun(School of Surveying and Mapping,Information Engineering University,62 Kexue Road,Zhengzhou 450001,China;State Key Laboratory of Geo-Information Engineering,1 Mid-Yanta Road,Xi’an 710054,China;Xi’an Research Institute of Surveying and Mapping,1 Mid-Yanta Road,Xi’an 710054,China;Xi’an Aerospace Data Technology Co Ltd,342 Fourth-Shenzhou Road,Xi’an 710100,China)

机构地区：[1]信息工程大学地理空间信息学院,郑州市450001 [2]地理信息工程国家重点实验室,西安市710054 [3]西安测绘研究所,西安市710054 [4]西安航天天绘数据技术有限公司,西安市710100

出　　处：《大地测量与地球动力学》2020年第5期546-550,共5页Journal of Geodesy and Geodynamics

基　　金：国家重点基础研究发展计划(2013CB733303);国家自然科学基金(41674082);中国科学院大地测量与地球动力学国家重点实验室开放基金(SKLGED2017-3-2-E)。

摘　　要：简要介绍CSR、GFZ和JPL机构的GRACE RL06时变重力场模型数据,并对比分析RL06和RL05数据的解算模型。从全球陆地水储量变化反演结果、时变重力场模型阶方差和C 20项时间序列3个方面,对2004-01~2014-11期间RL06和RL05时变重力场模型数据进行对比分析。结果表明,GRACE RL06时变重力场模型数据质量的和精度较RL05有明显提高,其全球陆地水储量变化反演结果去条带噪声效果更好、信噪比更高;在高阶项部分,RL06模型数据的阶方差小于RL05;RL06模型数据的C 20项时间序列幅值变化小于RL05,与SLR所得C 20项数据也更接近。相同条件下,采用CSR RL06模型阶方差最小,利用RL06模型所得全球陆地水储量变化反演结果信噪比值最大。This article briefly introduces GRACE RL06 time-varying gravity field model data from CSR,GFZ and JPL institutions,and compares and analyzes the calculation models of RL06 and RL05 data.Using the RL06 and RL05 time-varying gravity field model data from 2004-01 to 2014-11,we analyze the RL06 and RL05 data from three aspects:the global land storage change inversion results,the time-variable gravity field model degree variance,and the C 20 term time series.We perform a comparative analysis.The experimental results show that the quality and accuracy of RL06 data is improved significantly.The de-stripe effect of results using RL06 data is better and the signal-to-noise ratios of results are larger.The degree variance of RL06 data is smaller than degree variance of RL05 data in high degree.The C 20 time series of RL06 data is closer to SLR data.The quality of CSR RL06 is best in CSR,GFZ and JPL RL06 data.The signal-to-noise ratios of global terrestrial water storage inversion results with using CSR RL06 data is largest and degree variance of CSR RL06 data is largest under the same conditions.

关 键 词：GRACE时变重力场 RL05模型数据 RL06模型数据 比较分析 

分 类 号：P223[天文地球—大地测量学与测量工程]