目前野外工作大口径双波段红外经纬仪的外场辐射定标装置普遍采用大面积均匀扩展辐射源，该方法需要两套定标设备，功耗高、便携性能差、研制难度大。为解决这一问题，分析比较了不同定标方法的原理、过程及技术性能，得出琼斯法是对野外环境下工作的大口径红外经纬仪进行辐射定标最佳方案的结论。为此研制了双波段红外辐射计，该辐射计由黑体照明光管和参考辐射计两部分组成，采用牛顿式望远系统及中继光路系统，选用InGaAs和PbSe两款红外探测器分别接收短波红外和中波红外辐射信号，可对短波和中波双波段进行辐射定标。讨论了校准参考辐射计对保证红外经纬仪最终测量精度的必要性，并给出参考辐射计在短波和中波不同的校准方法和校准结果。对校准该辐射计的不确定度进行了分析，短波和中波校准不确定度分别为4.12%和2.35%。

At present, we typically use large extended radiation source as radiometric calibration device for the out-field work of large aperture dual-waveband infrared theodolite system. This method needs two sets of equipments, which exists the disadvantages of high power consume, inconvenient portable performance and difficult to develop. To solve this problem, the principles, processes and technical performances of different calibration methods are analyzed. Then the Jones method is selected as large aperture infrared theodolite out-field work environment radiometricca libration meth. The dual-band infrared radiometer is developed, which consists of two parts, blackbody lighting tube and reference radiometer. The radiometer uses Newton structure as telescopic system and relay optical path system, and selects InGaAs and PbSe as double-band infrared detectors to calibrate short wave infrared radiation (SWIR) and radiation middle wave infrared (MWIR) respectively. Then the necessity of the reference radiometer calibration to ensure the infrared theodolite final measuring precision is discussed, and different calibration methods and results for calibrating reference radiometer in SWIR and MWIR are presented. Finally, the calibration uncertainty of the radiometer is analyzed, the SWIR and MWIR calibration uncertainties are 4.12% and 2.35% respectively.