Optical axis orientation adjusting method based on satellite-borne remote sensing instrument

Abstract

The invention relates to an optical axis orientation adjusting method based on a satellite-borne remote sensing instrument. The optical axis orientation adjusting method at least comprises the following steps that under the condition that a control unit generates a preset termination position for optical axis adjustment according to an instruction of a satellite ground system, the control unit generates a dynamic limiting region at least comprising a boundary layer based on an expected orientation state sent by the satellite ground system and an orientation state fed back by an orientation measurement unit, and controls the execution unit to adjust the optical axis to move to the preset termination position in a mode of being bound to the dynamic limiting region.

Description

technical field [0001] The invention belongs to the technical field of remote sensing, and in particular relates to a method for adjusting the direction of an optical axis based on a spaceborne remote sensing instrument. Background technique [0002] With the wide application of satellites in weather forecasting, resource detection, ocean observation, and disaster reduction, users have put forward higher and higher requirements for the resolution and measurement accuracy of remote sensing instruments carried by satellites. If the optical axis of the remote sensing instrument cannot be precisely pointed to the target area, corresponding accurate data or images cannot be obtained, which may cause the failure of the entire satellite remote sensing mission. Therefore, it is very urgent to improve the pointing accuracy of the optical axis of remote sensing instruments, and measures to adjust the pointing of the optical axis must be taken to ensure the normal and efficient work of...

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Problems solved by technology

However, on the one hand, the on-orbit adjustment system of the optical axis pointing disclosed in this patent does not take into account that the on-orbit optical axis adjustment of the satellite is likely to cause the jitter of the spaceborne remote sensing instrument, let alone the series of uncertain factors and inherent interference of the satellite’s on-orbit motion , for remote sensing satellites that require high stability and high control precision, the jitter caused by the above-mentioned optical axis pointing adjustment and the uncertainty brought by the satellite in orbit will seriously affect the accuracy and stability of directional imaging of spaceborne remote sensing instruments, which will not only lead to relative The failure of radiometric calibration also makes it difficult to image clearly; on the other hand, the on-orbit adjustment system of the optical axis pointing disclosed in this patent cannot realize the rapid and accurate adjustment of the optical axis during the adjustment process only by relying on the measurement of the rotation angle and the judgment mechanism of the preset threshold. precise pointing

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