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利用NOAA-16/FY-1C和ASAR数据纠正大气水汽对重轨星载D-INSAR的影响
Alternative TitleCorrection of atmospheric water vapour effect on the repeat-pass spaceborne D-INSAR by using NOAA-16/FY-1V and ASAR data
谌华; 单新建; 张云华; 李建华; 屈春燕; 北京8701信箱
Department国家863计划微波遥感技术实验室
Source Publication地球物理学报
2007
Volume50Issue:3Pages:707-713
ISSN0001-5733
Language中文
Keyword重轨星载d-insar 水汽延迟 干涉条纹 水汽含量反演 水汽影响去除
Abstract大气水汽影响一直是造成重轨星载合成孔径雷达差分干涉测量监测结果不确定性的一个重要因素.本文以地表形变速率稳定的延怀盆地为试验区,利用ASAR数据得到该区域的差分干涉处理结果,利用与ASAR数据获取时间相近的NOAA-16/FY-1C数据对该区域的大气水汽含量进行了反演.通过这些结果,对差分干涉处理结果中大气水汽的影响进行了去除.去除大气水汽影响后得到的地表形变结果与野外考察实测结果基本吻合,从而验证了该方法的可行性.
Other AbstractThe authors derived the normalized difference vegetation index (NDVI) from the NOAA/AVHRR Land dataset, at a spatial resolution of 8km and 15-day intervals, to investigate the vegetation variations in China during the period from 1982 to 2001. Then, GIS is used to examine the relationship between precipitation and the Normalized Difference Vegetation Index(NDVI) in China, and the value of NDVI is taken as a tool for drought monitoring. The results showed that in the study period,China's vegetation cover had tended to increase, compared to the early 1980s; mean annual NDVI increased 3.8%.The agricultural regions(Henan, Hebei, Anhui and Shandong) and the west of China are marked by an increase, while the eastern coastal regions are marked by a decrease. The correlation between monthly NDVI and monthly precipitation/temperature in the period 1982 to 2001 is significantly positive( R2 =0.80, R2 =0.84); indicating the close coupling between climate conditions(precipitation and temperature) and land surface response patterns over China. Examination of NDVI time series reveals two periods:(1)1982-1989, marked by low values below average NDVI and persistence of drought with a signature large-scale drought during the 1982 and 1989; and (2) 1990-2001, marked by a wetter trend with region-wide high values above average NDVI and a maximum level occurring in 1994 and 1998.
Indexed ByCSCD
Funding Project中国科学院空间科学与应用研究中心
Citation statistics
Document Type期刊论文
Identifierhttp://ir.nssc.ac.cn/handle/122/1951
Collection微波遥感部
Corresponding Author北京8701信箱
Recommended Citation
GB/T 7714
谌华,单新建,张云华,等. 利用NOAA-16/FY-1C和ASAR数据纠正大气水汽对重轨星载D-INSAR的影响[J]. 地球物理学报,2007,50(3):707-713.
APA 谌华,单新建,张云华,李建华,屈春燕,&北京8701信箱.(2007).利用NOAA-16/FY-1C和ASAR数据纠正大气水汽对重轨星载D-INSAR的影响.地球物理学报,50(3),707-713.
MLA 谌华,et al."利用NOAA-16/FY-1C和ASAR数据纠正大气水汽对重轨星载D-INSAR的影响".地球物理学报 50.3(2007):707-713.
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