遥感学报
遙感學報
요감학보
JOURNAL OF REMOTE SENSING
2009年
5期
792-800
,共9页
交叉辐射定标%SVISSR/FY-2C%AIRS/Aqua%分裂窗通道
交扠輻射定標%SVISSR/FY-2C%AIRS/Aqua%分裂窗通道
교차복사정표%SVISSR/FY-2C%AIRS/Aqua%분렬창통도
intercalibration%SVISSR/FY-2C%AIRS/Aqua%split-window channels
利用高精度和稳定的AIRS/Aqua(Atmospheric InfraRed Sounder on board Aqua)数据对SVISSR/FY-2C(Stretched Visible and Infrared Spin Scan Radiometer onboard FengYun 2C)的两个分裂窗通道IR1(InfraRed 1,10.9 μm)和IR2(InfraRed 2,11.9μm)进行交叉辐射定标的方法,并利用赤道附近2006年12月和2007年12月的AIRS和SVISSR数据完成了交叉辐射定标,结果表明,SVISSR数据与卷积得到的AIRS数据高度线性相关,SVISSR/FY-2C传感器的两个分裂窗通道不仅存在定标误差,而且定标误差随时间的变化呈现增大的趋势.相对于AIRS/Aqua测量值,当SVISSR的通道亮温从220 K变化到340 K时,2006年12月IRl通道的温度调整量从5.8 K变化到-4.4 K,而2007年12月IR1通道的温度调整量从6.9 K变化到-5.1 K;2006年12月IR2通道的温度调整量从2.2 K变化到-1.5 K,而2007年12月IR2通道的温度调整量从6.3 K变化到-6.1 K.
利用高精度和穩定的AIRS/Aqua(Atmospheric InfraRed Sounder on board Aqua)數據對SVISSR/FY-2C(Stretched Visible and Infrared Spin Scan Radiometer onboard FengYun 2C)的兩箇分裂窗通道IR1(InfraRed 1,10.9 μm)和IR2(InfraRed 2,11.9μm)進行交扠輻射定標的方法,併利用赤道附近2006年12月和2007年12月的AIRS和SVISSR數據完成瞭交扠輻射定標,結果錶明,SVISSR數據與捲積得到的AIRS數據高度線性相關,SVISSR/FY-2C傳感器的兩箇分裂窗通道不僅存在定標誤差,而且定標誤差隨時間的變化呈現增大的趨勢.相對于AIRS/Aqua測量值,噹SVISSR的通道亮溫從220 K變化到340 K時,2006年12月IRl通道的溫度調整量從5.8 K變化到-4.4 K,而2007年12月IR1通道的溫度調整量從6.9 K變化到-5.1 K;2006年12月IR2通道的溫度調整量從2.2 K變化到-1.5 K,而2007年12月IR2通道的溫度調整量從6.3 K變化到-6.1 K.
이용고정도화은정적AIRS/Aqua(Atmospheric InfraRed Sounder on board Aqua)수거대SVISSR/FY-2C(Stretched Visible and Infrared Spin Scan Radiometer onboard FengYun 2C)적량개분렬창통도IR1(InfraRed 1,10.9 μm)화IR2(InfraRed 2,11.9μm)진행교차복사정표적방법,병이용적도부근2006년12월화2007년12월적AIRS화SVISSR수거완성료교차복사정표,결과표명,SVISSR수거여권적득도적AIRS수거고도선성상관,SVISSR/FY-2C전감기적량개분렬창통도불부존재정표오차,이차정표오차수시간적변화정현증대적추세.상대우AIRS/Aqua측량치,당SVISSR적통도량온종220 K변화도340 K시,2006년12월IRl통도적온도조정량종5.8 K변화도-4.4 K,이2007년12월IR1통도적온도조정량종6.9 K변화도-5.1 K;2006년12월IR2통도적온도조정량종2.2 K변화도-1.5 K,이2007년12월IR2통도적온도조정량종6.3 K변화도-6.1 K.
This paper addresses the intercalibration of the two split-window channels IRI (10.9μm) and IR2 (11.9μm) of SV1SSR (Stretched Visible and Infrared Spin Scan Radiometer) onboard the geostationary satellite FY-2C (FengYun 2C) against the most accurate and stable AIRS (Atmospheric Infrared Sounder) sensor onboard the polar-orbit satellite Aqua. The intercalibration was implemented using both the AIRS and SVISSR data around the equator in December of 2006 and 2007. The results reveal that: (1) the SVISSR data are highly linearly correlated with the convoived AIRS data, (2) calibration errors exist in SVISSR channels IR1 and IR2, and (3) the discrepancies become larger with time increment. With respect to the AIRS/Aqua measurements, when the brighmess temperatures in SVISSR channels change from 220K to 340K, the temperature adjustment for IR1 in Dec., 2006 varies from 5.8K to -4.4K, and changes from 6.9K to -5.1K in Dee., 2007; The temperature adjustment for IR2 in Dec., 2006 goes from 2.2K to -1.5K, and varies from 6.3K to -6.1K in Dec., 2007.
