A full-link infrared sensor imaging simulation method

The core of infrared sensor detection is to extract targets from system noise. In order to evaluate the detection ability of sensors, it is necessary to comprehensively consider factors such as orbital motion, sensor noise, sensor optical axis disturbance, and scenery noise to achieve accurate calculation of system noise. This article proposes a full link infrared sensor imaging simulation method, and establishes a position inversion model combined with sensor optical axis disturbance in terms of geometric model. Starting from orbit simulation, the establishment of the object image relationship is completed, which can achieve accurate image motion simulation in the time domain. In terms of radiation modeling, a sensor noise model was established using the load error transfer algorithm, and combined with the detection model, the calculation of system noise was completed. Through comparison with in orbit measured data, it was found that the simulation error of system noise was less than 30%, which can effectively support the ability estimation of high orbit infrared detection satellites and achieve closed-loop analysis from load indicators to detection capabilities.