Hello! Using the basic tools of ENVI-preprocessing -Datat- specific utility-thermal infrared-reference channel emissivity, the radiometric calibration of ASTER data can be realized, and the DN value can be converted into emissivity and temperature value.

When operating, the emissivity will be output by default, and there will be an option to ask you to output a temperature image. Select Yes to output a temperature image.

For more information, please refer to ENVI Remote Sensing Image Processing Method P275-276 written by Deng Shubin.