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利用MODIS对FY-2E/VISSR红外窗区和水汽通道的交叉绝对辐射定标
引用本文:徐娜,胡秀清,陈林,张玉香.利用MODIS对FY-2E/VISSR红外窗区和水汽通道的交叉绝对辐射定标[J].红外与毫米波学报,2012,31(4):319-324.
作者姓名:徐娜  胡秀清  陈林  张玉香
作者单位:国家卫星气象中心中国遥感卫星辐射测量与定标重点开放实验室,北京,100081
基金项目:国家自然科学基金(41105010);国家重点基础研究发展计划(973计划)(2011CB403401)
摘    要:介绍了利用高精度的TERRA/MODIS观测资料对FY-2E红外窗区和水汽吸收通道进行绝对交叉定标的方法,并选用2010年5、7和12三个月的卫星数据进行了交叉定标计算.结果表明,交叉定标系数计算亮温与MODIS匹配点处实测结果非常接近,约90%的亮温偏差小于1K,其中高温区结果更稳定,偏差小于低温区,这主要是由于低温区杂散光影响显著造成的.总的说来,借助TERRA/MODIS可以实现对FY-2E/VISSR的高频次高精度的绝对定标,为FY-2E在轨替代定标提供重要的方法基础.

关 键 词:静止气象卫星  交叉绝对定标  红外通道  时空匹配  光谱匹配
收稿时间:2011/6/27
修稿时间:2/27/2012 6:23:09 PM

Cross-calibration of FY-2E/VISSR infrared window and water vapor channels with TERRA/MODIS
Xu N,HU Xiu-Qing,CHEN Lin and ZHANG Yu-Xiang.Cross-calibration of FY-2E/VISSR infrared window and water vapor channels with TERRA/MODIS[J].Journal of Infrared and Millimeter Waves,2012,31(4):319-324.
Authors:Xu N  HU Xiu-Qing  CHEN Lin and ZHANG Yu-Xiang
Affiliation:National Satellite Meteorological Center,National Satellite Meteorological Center,National Satellite Meteorological Center and National Satellite Meteorological Center
Abstract:This paper addresses the cross-calibration method of infrared window and water vapor channels of VISSR (Visible and Infrared Spin Scan Radiometer) with reference data provided by the onboard geostationary satellite FY-2E with MODIS (MoDerate resolution Imaging Spectroradiometer) and the onboard polar-orbit satellite TERRA. The cross-calibration is implemented using the satellite remote date in May, July and December of 2010. The results show that the bright temperature calculated using cross-calibration coefficients is nearly equal to the observed value of MODIS for all collocation samples, and about 90 percent of temperature bias is less than 1K. It can also be seen that the calibration slope decreases obviously from May to the beginning of July, and ascends slightly in the last ten-day of July,then keeps steady in December. The variation of calibration coefficients reveals great consistent with that of remote temperatures. All in all, the cross-calibration method described here can increase frequency and accuracy, and provide a methodological foundation for on-orbit calibration of FY-2E.
Keywords:Geostationary meteorological satellite  cross-calibration  infrared channel  temporal and spatial collocation  spectral matching
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