Abstract
The measuring method for dynamic radiation characteristics of a flying airplane is researched. As traditional atmospheric correction method by calculating the atmospheric transmittance and path radiation with software has poor correction precision, this paper proposes a new radiation measurement method to measure the atmoshperic transmittance in real time. The method uses a blackbody carried by the target airplane to measure the atmoshperic transmittance in real time and takes the real-time measured data to correct the target airplane radiation and to improve the radiation measurement precision. Ground simulation experiments for an airplane infrared radiation measurement are performed by means of a midwave (MW) infrared camera, a longwave (LW) infrared camera, two extended-area blackbodies, and a piece of ZnSe. The MODTRAN calculated, CART calculated, and the real-time measured atmospheric transmittances are used to correct the inverted blackbody target radiation. The obtained results show that the target radiation measurement precision by the proposed real-time measured atmospheric transmittance has improved by above 100% as compared with those of MODTRAN and CART calculated.
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