A vicarious calibration for thermal infrared bands of TERRA-MODIS sensor using a new calibration test site-lake dali, China

This Paper described that in-flight radiometric calibration for thermal channels of TERRA-MODIS sensors using a new calibration test site-Dali-lake, China. 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. At the same time the spectral response of Satellite sensor and that of ground-based sensor are coupled. At last the apparent radiance of sensor spectral channels is compared to the digital count of satellite´s output to give the calibration coefficient. The calibration result in May 31 showed the difference between inflight and on-board calibration was equivalent to a brightness temperature of 1.44 k for TERRA-MODIS channel 31 and 0.35 K for channel 32 respectively.