Space reference calibration method and device for optical satellite pointing measurement system

Abstract

The embodiment of the invention provides a space reference calibration method and device for an optical satellite pointing measurement system. The method comprises steps of resampling an absolute output quantity of an absolute pointing measurement subsystem through a relative output quantity of a relative pointing measurement subsystem to obtain a sampling frequency normalization pointing parameter so as to obtain an internal space reference conversion time sequence parameter of the absolute pointing measurement subsystem; acquiring a space reference conversion time sequence parameter betweenthe absolute pointing measurement subsystem and the relative pointing measurement subsystem according to any space reference absolute pointing parameter sequence parameter and the relative output quantity; and constructing a space-time reference conversion model according to the absolute pointing internal space reference conversion time sequence parameter and the space reference conversion time sequence parameter between the absolute pointing measurement subsystem and the relative pointing measurement subsystem so as to perform space reference calibration of the pointing measurement system. The embodiment of the invention lays a foundation for high-efficiency and high-quality imaging and subsequent on-orbit application of a high-resolution optical satellite.

Description

technical field [0001] The invention relates to the technical field of high-resolution optical remote sensing satellite design and preprocessing, in particular to a space reference calibration method and device for an optical satellite pointing measurement system. Background technique [0002] In order to achieve precise processing and services, high-resolution optical remote sensing satellites usually use a high-precision orbit measurement system to achieve high-precision spatial position acquisition, a high-precision space pointing measurement system to achieve high-precision spatial attitude perception, and a high-precision time unified system to achieve different payloads. High-precision synchronization of time and time, using high-precision on-orbit calibration methods and models to achieve high-precision calibration of system error parameters. Among them, for remote sensing satellites with an orbital altitude of 500-600 kilometers, a space pointing error of 1 arc secon...

AI Technical Summary

Problems solved by technology

However, as a high-precision absolute pointing measurement load, the star sensor will automatically stop working to protect the safety of the internal CCD device when the star sensor is observing the sun; Measurement system internal installation relationship and external space reference changes

In summary, due to the influence of various external factors, the reference change of the pointing measurement system is a normal state, and it is difficult to avoid, which makes it difficult to unify the spatial reference of the pointing measurement system in optical satellites with high precision.

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