Single-satellite autonomous positioning method adopting area array optical payload

Abstract

The invention discloses a single-satellite autonomous positioning method adopting an area array optical payload. The method comprises the following steps: S1, obtaining a remote sensing image after earth observation, matching the remote sensing image with a ground mark point information bank, extracting all ground mark points included in the remote sensing image, and selecting three ground mark points for positioning from all the ground mark points; S2, performing spatial geometric position modeling on the three ground mark points for positioning, and obtaining a spacecraft positioning model in combination with a geometric relationship among a ground mark point coordinate system, a camera coordinate system, an image plane coordinate system and a geocentric inertial coordinate system; and S3, solving the spacecraft positioning model by adopting a preset processing algorithm to obtain single-satellite autonomous positioning output so as to complete autonomous positioning of a single satellite. According to the method disclosed by the invention, autonomous positioning can be completed by only using spacecraft earth observation payloads, so that a spacecraft can easily fit out spacecraft orbit parameters to enable a spacecraft measuring orbit to break away from external conditions, and the interference immunity and reliability are greatly enhanced.

Description

technical field [0001] The invention relates to the technical field of spacecraft orbit determination research, in particular to the technology of spacecraft orbit determination, and in particular to an autonomous single-satellite positioning method using an area array optical load. Background technique [0002] With the development of aerospace technology in various countries, the number of satellites in orbit has increased sharply, which makes the ground measurement and control station overburdened, and the measurement and control system is prone to information congestion, which threatens the safe operation of spacecraft in orbit. In order to ensure the safety and reliability of the spacecraft and reduce the burden on the ground, the spacecraft should have the ability to operate autonomously, which requires the spacecraft to have the ability to determine the orbit independently with high precision. Investigating the existing spacecraft orbit determination methods, most of ...

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Problems solved by technology

Ground-based orbit determination has the highest accuracy, but lacks autonomy, and the limited layout of ground measurement and control stations directly affects positioning accuracy and orbit coverage; space-based orbit determination has higher accuracy and certain autonomy, but the space-based system itself has The orbit still needs the observation and support of the ground measurement and control station, and the space-based system is extremely vulnerable to human interference; the astronomical orbit determination obtains the orbit information of the spacecraft by observing natural celestial bodies, and its autonomy is extremely high, but the observation accuracy is limited by the horizon and other measurements. Due to the influence of equipment, the error is between several hundred meters and several kilometers

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