文献类型：会议论文

英文题名：Rice monitoring using ENVISAT ASAR data in China

作者：Li, Zengyuan[1] Sun, Guoqing[2] Wooding, Mike[3] Pang, Yong[1] Dong, Yanfang[4] Chen, Erxue[1] Tan, Bingxiang[1]

第一作者：李增元

通信作者：Li, Z.|[a00059d4c101852f46771]李真;[a0005f2ab81a6dce0c02a]李真;[a0005748c32d848f34991]李智;[a000555548ccdd569abf4]李周;[a00052f54bec12f232350]李臻;[a0005b497ddc45cf6d4fe]李智;[a0005d060357793c20187]李真;[a0005401cad1b46426220]李珠;[a0005dea0112d436361e6]李振;

机构：[1] Forest Remote Sensing Lab., Research Institute of Forest Resource and Information Technology, Chinese Academy of Forestry, Beijing, 100091, China; [2] Department of Geography, University of Maryland, College Park, MD 20742, United States; [3] Remote Sensing Applications Consultants [RSAC], Hampshire, United Kingdom; [4] Institute of Remote Sensing Applications, Chinese Academy of Sciences, Beijing 100101, China

会议论文集：Proceedings of the 2004 Envisat and ERS Symposium

会议日期：September 6, 2004 - September 10, 2004

会议地点：Salzburg, Austria

语种：英文

外文关键词：Biomass - Electromagnetic wave backscattering - Forestry - Light polarization - Monitoring - Synthetic aperture radar

年份：2005

摘要：During previous studies, two ERS SAR images acquired at the transplanting stage and the ripening stage were used to generate accurate rice maps in China. ENVISAT ASAR with multiple incidence angles and multiple polarisations provides more imaging configurations for rice mapping and rice biomass monitoring during the rice growing cycle. Based on field measured rice biophysical parameters, rice paddy backscatter has been simulated by a continuous canopy microwave backscatter model. The model shows that it is possible to use several different ASAR data combinations to map rice: 1)one image before field flooding, with another at the flooding/ transplanting stage; 2) one image at the flooding/transplanting stage, together with another image at the ripening stage; 3) one image at the booting stage, with another at the ripening stage; 4) one dual-polarisation image on a single date; 5) two dual polarisation images obtained within one week (one with hh/hv, the other with vv/vh). Of these alternative approaches, the last two use the polarisation capability of ASAR data, while the first three methods can benefit from more timely data acquisition using the multi-angular imaging capability. Most of these selections have been evaluated in China.