In practical application, due to the parameter accuracy of two point temperature correction is limited by readout circui目前实用性较好的两点温度定标法的校准系数精度受读出噪声、信号动态范围、模数转换字长和运算噪声的限制，很难使焦平面探测器的空间残留噪声达到应有的精度。