Optical telescope external-field tracking precision detection method based on celestial fixation

Abstract

The invention discloses an optical telescope external-field tracking precision detection method based on celestial fixation. The method comprises the following steps of setting a tracking path capableof covering the speed and acceleration range of tracking precision detection; according to a target movement speed, offering an initial tracking speed, setting an initial moment, simulating movementof a virtual target, and starting automatic tracking of a telescope; calculating observation values Dt (X,Y) on CCD images of a space target at all sampling moments according to the sampling frequency, and utilizing Dt (X,Y) for guiding the telescope in conducting automatic tracking; calculating the tracking precision of the telescope. The method is simple and feasible, the detection precision isdecided by an adopted star catalogue, extremely-high precision can be achieved and is far higher than the precision which indoor detection equipment and a traditional detection method can achieve, extra burden is not needed, and the method is feasible at any time, and can be widely applied to external-field tracking precision checking of optical telescopes.

Description

technical field [0001] The invention belongs to the technical field of tracking precision of optical telescopes, and in particular relates to a detection method for tracking precision of optical telescopes based on astronomical positioning. Background technique [0002] Since the advent of optical telescopes, optical telescopes have been the most important tool for human beings to explore space. With the launch of artificial satellites, the number of space targets has increased significantly, and it has been widely used for space target observation. Optical telescopes have become an important part of the space target surveillance network and an important means of space target situational awareness. Tracking accuracy is one of the important technical indicators of optical telescopes. Tracking accuracy refers to the real-time measurement of the fluctuation degree of the tracking target by the telescope within a certain range of angular velocity and angular acceleration. [0...

AI Technical Summary

Problems solved by technology

In this method, because there are many error sources in the moving target, and the error is large, the precision of the rotating target itself is low, so the precision of the tested equipment is low; The production of rotating targets puts forward higher requirements and increases the difficulty

The field detection method is to use the telescope to track the space target in real time, and calculate the off-target amount from the acquired CCD image to obtain the tracking accuracy of the telescope. However, due to the single speed range of the real space target, the traversal of each speed cannot be realized. In addition, the position of the real space target The accuracy depends on the limitation of image processing and centering accuracy, so an additional error source is introduced for the measurement of tracking error

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