| 基于MODIS与GPS的D-InSAR大气延迟改正量提取 |
| |
| 引用本文： | 王江涛,邓喀中,范洪冬,刘晓菲,李斌.基于MODIS与GPS的D-InSAR大气延迟改正量提取[J].测绘科学技术学报,2012(4):271-275. |
| |
| 作者姓名： | 王江涛 邓喀中 范洪冬 刘晓菲 李斌 |
| |
| 作者单位： | 中国矿业大学江苏省资源环境信息工程重点实验室 |
| |
| 基金项目： | 国家自然科学基金项目(41071273);高等学校博士学科点专项科研基金项目(20090095110002) |
| |
| 摘 要： | 受GPS站点密度的限制,利用GPS数据改正D-InSAR中大气延迟误差往往达不到很好的效果。为此,研究了GPS与MODIS联合实现大气延迟改正量提取方法,利用两期GPS观测数据及相应时间的MODIS数据分析GPS-PWV与MODIS-PWV的关系,进一步得到MODIS水汽的校正模型。经过GPS+MODIS算法改正后,大气延迟改正精度为3.618mm,满足形变测量的要求。实验结果表明:在大气状态变化缓慢时,利用GPS结合MODIS数据对D-InSAR大气延迟改正有一定的效果。
|
| 关 键 词： | 全球定位系统 中分辨率成像光谱仪 重复轨道合成孔径雷达差分干涉测量 大气延迟 可降水量 |
Extraction of D-InSAR Atmospheric Delay Correction Based on MODIS and GPS |
| |
| WANG Jiangtao,DENG Kazhong,FAN Hongdong,LIU Xiaofei,LI Bin.Extraction of D-InSAR Atmospheric Delay Correction Based on MODIS and GPS[J].Journal of Zhengzhou Institute of Surveying and Mapping,2012(4):271-275. |
| |
| Authors: | WANG Jiangtao DENG Kazhong FAN Hongdong LIU Xiaofei LI Bin |
| |
| Institution: | (China University of Mining and Technology,Jiangsu Key Laboratory of Resources and Environmental Information Engineering,Xuzhou 221116,China) |
| |
| Abstract: | Distributed the limitation of the density of the GPS sites,it could not reach a good effect if we only used GPS data to correct the error of atmospheric delay in D-InSAR.So a new method was investigated to get the correction of the atmospheric delay.Two-period of GPS data and the corresponding MODIS data were used to analyze the relationship between GPS-PWV and MODIS-PWV,then the vapor correction model of MODIS was obtained.The atmospheric delay correction precision had been 3.618 mm after using the algorithm that combined GPS with MODIS which met the requirements of the deformation measurement.The result proved that the correction of the atmosphere delay would be improved by using the method that combined GPS with MODIS when the atmospheric conditions changed slowly. |
| |
| Keywords: | GPS MODIS(Moderate Resolution Imaging Spectroradio-meter) D-InSAR(Differential Interferometric Synthetic Aperture Radar) atmospheric delay PWV(Precipitable Water Vapor) |
| 本文献已被 CNKI 等数据库收录！ |
