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  • 软件名称:干旱区地表L波段微波辐射特性分析穿透深度的影响
  • 软件大小: 0.00 B
  • 软件评级: ★★★
  • 开 发 商: 王定文,黄春林,顾娟
  • 软件来源: 《遥感技术与应用》
  • 解压密码:www.gissky.net

资源简介

摘要: 利用2012年黑河中游HiWATER实验区戈壁和大满超级站的土壤水分和温度廓线数据,基于LGMEB微波辐射传输模型,分析了L波段微波穿透深度随土壤水分的变化.在此基础上,分析了不同深度土壤水分和温度作为LGMEB模型输入,对L波段微波发射率和亮度温度的影响.研究结果表明:L波段微波穿透深度随土壤水分、温度的变化,呈现明显的差异,在本研究区L波段微波穿透深度在4~22cm 之间;在土壤水分较高的超级站,计算的L波段亮度温度与0~4cm土壤层的亮度温度更为接近,而在土壤水分较低的戈壁站,计算的L波段亮度温度与0~40cm土壤层的亮度温度更为接近.因此,在利用L波段微波数据反演土壤水分时,应考虑穿透深度的影响,以提高反演精度. 关键词: 土壤水分;  LGMEB;  微波遥感;  穿透深度;  干旱区     Abstract: Based on L\|MEB(the L\|band Microwave Emission of the Biosphere)model and observations of soil moisture and soil temperature profiles of two stations located at HiWATER experimental area in midstream of the Heihe River Basin in 2012,we analyzed the influence of soil moisture variation on L\|band microwave penetration depth.Also,we analyzed further the influence of soil moisture and temperature with different depths as input of L\|MEB on calculations of surface emissivity and brightness temperature.It is shown that penetration depth ranges from 4 to 30 cm in these two sites and obviously changes with soil moisture profile.The calculated brightness temperatures are closer to results of 0~4 cm in Super Station but are closer to results of 0~40 cm in Gobi Station.Therefore,it should be taken much attention to the impact of penetration depth on retrieving soil moisture based on L\|band microwave brightness temperature.

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