Estimation of detection distance of antisubmarine patrol aircraft by infrared system

In order to calculate the detecting distance when a submarine is detecting anti-submarine patrol aircraft, a calculation method of detecting distance based on infrared imaging system is designed and an infrared system detection model is established. First of all, based on the number of pixels caused in the infrared detection system, the anti-submarine patrol aircraft is judged as the point source or the face source target, then the temperature difference between anti-submarine patrol aircraft and the background is calculated. Using the relationship between probing probability and input signal-to-noise ratio, combined with the minimum resolvable temperature difference that the system can reach, calculate the detection distance between the submarine and the anti-submarine patrol aircraft. Finally, using the proposed antisubmarine patrol aircraft computing model, referring to the parameters of P-8A patrol aircraft, the patrol aircraft infrared radiation and detection distance of full-angle simulation is analyzed.