Target positioning method applicable to vehicle-mounted photoelectric watching-aiming system with atmospheric refraction

Abstract

The invention discloses a target positioning method applicable to a vehicle-mounted photoelectric watching-aiming system with atmospheric refraction and belongs to the technical field of vehicle-mounted photoelectric observation. By adopting the target positioning method, geographical location information of a target can be solved in real time by modifying light deflection with atmospheric refraction and implementing coordinate conversion calculation of different coordinate systems according to geographical location information of a carrying vehicle, posture angles of the carrying vehicle, angles of a photoelectric turret, laser ranging values, the altitude of a target point and atmospheric parameters of a carrying vehicle point. By adopting the target positioning method, target positioning errors caused by atmospheric refraction can be modified on the basis of a conventional vehicle-mounted target positioning way, that is, vehicle-mounted target positioning precision is improved through innovation of techniques, and the method has the characteristics of being high in calculation precision, simple to operate, and the like.

Description

technical field [0001] The invention belongs to the technical field of airborne photoelectric reconnaissance, and mainly relates to a target positioning correction method under atmospheric refraction for an airborne photoelectric sighting and sighting system. The method can solve the target geographic location under atmospheric refraction conditions in real time. Background technique [0002] Since the temperature, pressure, and water vapor pressure of the earth's atmosphere are different at different locations, the refractive index of each point in the earth's atmosphere is also different, which leads to the formation of optical refraction during the transmission of light in the atmosphere, causing the path in the optical transmission process to be deflected. shift and cause the optical path to increase, affecting the target positioning accuracy. See the attachment for the relationship diagram of the airborne photoelectric observation and sighting system for ground / sea targ...

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Problems solved by technology

This method uses a statistical model to obtain the national atmospheric refractivity, but cannot accurately obtain the atmospheric refractivity in the environment where the current radar site and target point are located; at the same time, the ray tracing method used in this article is based on a spherical layered model, which is consistent with the geoid There is a large difference, which will lead to low accuracy of the elevation angle error and distance error calculated by this model

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