摘要
利用青海湖水面辐射校正场对HJ-1B卫星热红外通道进行绝对辐射定标,由CE312热红外辐射计测量水面辐亮度,结合辐射传输模型MODTRAN4.0计算大气透过率和上行程辐射,同时进行CE312通道与HJ-1B卫星热红外通道光谱匹配,计算传感器入瞳处等效辐亮度值。通过2010年8月1日和5日两组传感器入瞳等效辐亮度值和卫星通道计数值回归得到该卫星通道绝对定标系数,并使用内蒙达里湖水面辐射校正场2010年6月29日实测数据对定标结果进行检验。
This paper described that in-flight radiometric calibration for thermal bands of HJ-1B using the test site Qinghai-lake.The radiance of water surface was measured by CE312,and the spectral transmittance and upward radiance of the atmosphere was calculated using radiance transfer model MODTRAN4.0.At the same time the spectral response of HJ-1B sensor and that of CE312 sensor are coupled.The calibration coefficient is given by the comparison between the apparent radiance of sensor and the digital count of satellite＇s output from the data of Aug.1 and 5,2010.The results are validated by the data of June 29,2010 at the Dali-lake test site.
出处
《遥感信息》
CSCD
2012年第1期37-41,83,共6页
Remote Sensing Information
基金
国际科技合作项目(2008DFA21540)
科技部国际科技合作计划资助(2010DFA21880)
863计划资助项目(2008BAC34B02)
关键词
青海湖
达里湖
绝对辐射定标
辐射传输
辐亮度
Qinghai lake
Dali lake
absolute radiometric calibration
radiance transfer
radiance
