Low earth orbit satellite autonomous orbit determination method utilizing space-based visible light camera

Abstract

The invention relates to a low earth orbit satellite autonomous orbit determination method which comprises the following steps of selecting a plurality of high earth orbit objects (including large space debris) as calibrated satellites to acquire a precise ephemeris of the high earth orbit objects; when a low earth orbit satellite cannot acquire the precise ephemeris, utilizing a boarded space-based visible light camera to point to the high earth orbit calibrated satellites, performing tracking for a period of time to acquire an only angle measurement quantity; utilizing an on-board computer,combining rough ephemeris of the low earth orbit satellite, the precise ephemeris of the high earth orbit objects with the measurement quantity, performing reversed determination to obtain a precise orbit of the low earth orbit satellite. The invention provides a novel satellite autonomous orbit determination way; and when global positioning navigational satellite information cannot be utilized, the novel satellite autonomous orbit determination method can be used as an alternative method. The low earth orbit satellite autonomous orbit determination method provided by the invention is relatively simple in calculation model, fully utilizes space resources and meanwhile, is low in space-based visible light observation cost, small in energy consumption and strong in engineering applicability.

Description

technical field [0001] The invention relates to a satellite autonomous orbit determination method, specifically a method for reversely determining its own precise orbit by using a space-based visible light camera carried by a low-orbit satellite to observe a calibration target, and belongs to the technical field of satellite positioning and navigation. Background technique [0002] Satellites can rely as little as possible on ground equipment to achieve autonomous orbit determination, which not only has good economic value, but also facilitates the management of satellites and can better complete corresponding space tasks. If the low-orbit satellite does not have the ability to determine its own orbit, it can only rely on ground equipment to provide orbit determination information. Due to its movement characteristics, the time to receive measurements from ground equipment is very limited. Therefore, it is necessary to carry out independent orbit determination technology rese...

AI Technical Summary

Problems solved by technology

In order to fully realize autonomous orbit determination, the idea of ​​using X-ray pulsars for orbit determination is also proposed, and the pulse signal of natural stars is used to achieve autonomous orbit determination. However, this method is mainly used in interstellar navigation, and there are still many complicated problems. problem needs to be solved

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