FY-2B气象卫星红外通道发射前实验室定标与在轨辐射定标比较

COMPARISON OF PRE-LAUNCH CALIBRATION IN LAB WITHTHE RADIOMETRIC CALIBRATION IN ORBIT FOR FY-2B METEOROLOGICAL SATELLITE'S IR CHANNEL

FY 2B是自旋稳定卫星 ,红外通道无法进行在轨星上绝对定标 .FY 2B发射前的地面实验室定标方案参照了FY 2A在轨环境温度的变化情况 ,定标结果十分理想 .在轨电子学定标数据修正红外通道的量化关系 。

The FY 2B is a satellite with the spin stabilized attitude, it is had to make the absolute calibration for its IR channel while the satellite is in orbit. As the satellite's pre launch Lab calibration had a reference on the in orbit environment temperature changes of FY 2A, its calibration is ideal. With the correction on quantitatively relationship of the IR channel by the in orbit electronic calibration, the obtained results are very close to the ones from the simultaneous site radiometric calibration over the Qinghai lake.