文献类型：会议论文

英文题名：USING STOKES PARAMETERS DERIVED FROM RADARSAT-2 DATA FOR RAPE (BRASSICA NAPUS L.) BIOMASS INVERSION

作者：YueYang[1] WangfeiZhang[1] ZengyuanLi[2] ErxueChen[2] LeiZhao[2] YahongZhang[1] SunBin[2]

第一作者：YueYang

通信作者：WangfeiZhang[1]

机构：[1]Southwest Forestry Univ, Coll Forestry, Kunming, Yunnan, Peoples R China;[2]Chinese Acad Forestry, Inst Forest Resources Informat Tech, Beijing, Peoples R China

会议论文集：38th IEEE International Geoscience and Remote Sensing Symposium (IGARSS)

会议日期：JUL 22-27, 2018

会议地点：Valencia, SPAIN

语种：英文

外文关键词：Stokes parameters; Rape biomass; Inversion

年份：2018

摘要：In this study, we tested the performance of averaged Stokes parameters in rape biomass inversion over Radarsat-2 data. Five time series Radarsat-2 data were acquired and they covered the whole rape growth season. At each growth stage, 16 Stokes and its child parameters were extracted to analyze their sensitivity to rape biomass. When it comes to biomass inversion, random forest (RF) algorithm were chosen for the rape biomass inversion. The results showed that the total scattered intensity g(0) has highest coherence with rape biomass during the whole growth cycle. R-2 between them was 0.704. Other parameters including degree of polarization m, the degree of depolarization (1- m), the degree of linear polarization (P-l) and the linear polarization ratio (U-c) showed secondary higher coherence with R-2 between 0.3 to 0.4. These parameters also showed higher importance for the parameter importance analysis with RF method. RF method showed potential performance for rape biomass inversion with R-2 of 0.585 and RMSE of 71.86 g/m(2).