为满足遥感器在轨辐射定标的需求，研制了用于现场测量的红外通道式野外辐射计（Infrared channel field radiometer, ICFR），阐述了ICFR的整机工作原理、光学系统设计和机械结构设计，开展了ICFR实验室辐射定标和定标不确定度分析，结果表明ICFR各通道接收辐亮度与响应DN值具有较高的线性关系，辐射定标不确定度优于0.16 K。开展了ICFR抗热冲击性和工作环境温度适应性测试，结果表明ICFR具有较强的抗热冲击能力，能够适用于−20~50 ℃的工作环境。为检验验证ICFR测量数据的准确性和仪器的可靠性，在国家高分辨率遥感综合定标场开展了ICFR和CE312的外场比对实验，结果表明两台设备测量的地表亮温具有相同的变化趋势，二者对应通道测得的平均亮温偏差小于0.1 K，标准偏差小于0.3 K，验证了ICFR具有与CE312相近的测量精度和稳定性，在遥感器热红外波段场地定标方面具有重要应用前景。

In order to meet the needs of on-orbit radiometric calibration of remote sensors, an infrared channel field radiometer (ICFR) was developed for on-site measurement. The working principle, optical system design and mechanical structure design of ICFR were expounded, and the radiometric calibration and calibration uncertainty analysis of ICFR laboratory were carried out, the results showed that the received radiance of each ICFR channel had a high linear relationship with the response DN value, and the radiometric calibration uncertainty was better than 0.16 K. The ICFR thermal shock resistance and working environment temperature adaptability tests were carried out. The results showed that ICFR had strong thermal shock resistance and could be applied to the working environment of -20-50 ℃. In order to verify the accuracy of ICFR measurement data and the reliability of the instrument, the field comparison experiment of ICFR and CE312 were carried out in the National High-Resolution Remote Sensing Comprehensive Calibration Field. The results showed that the surface brightness temperature measured by the two devices had the same change trend, the average brightness temperature deviation measured by the corresponding channels of the two was less than 0.1 K, and the standard deviation was less than 0.3 K, which verified that ICFR had measurement accuracy and stability similar to CE312, and had important applications in remote sensor thermal infrared band site calibration.