Outer radiation source intelligent satellite selection method, system and radar platform based on navigation satellite

Abstract

The invention discloses an outer radiation source intelligent satellite selection method, a system and a radar platform based on a navigation satellite; the method comprises the following steps: usingthe visibility between the radar platform and the navigation satellite as constraint conditions so as to determine the available navigation satellite at a random moment, and building a visible satellite set; using the radar platform detection range scope and the geometric position visibility between the radar platform and the target as constraint conditions so as to constrain the target position,and building a target space position matrix; using the visibility between the target and the navigation satellite as constraint conditions, traversing each available navigation satellite in the visible satellite set, and determining the target visible position matrix corresponding to each available navigation satellite; determining the actual selected satellite by using scattering enhanced area conditions as constraints according to the target visible position matrix corresponding to each available navigation satellite. The method and system can solve the problems that an existing method cannot select the satellite if the target position is not determined.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and in particular relates to a navigation satellite-based intelligent satellite selection method for external radiation sources, a system and a radar platform. Background technique [0002] With the development of military technology, radar electronic countermeasures have developed to a new stage. Monostatic radars are seriously threatened by electronic jamming, anti-radiation missiles, ultra-low altitude penetration and stealth weapons. Electromagnetic wave stealth technology is comprehensive, including shape structure design, wave-absorbing (transparent) structural materials, wave-absorbing coatings, and active cancellation methods, which are only effective for general monostatic radars. [0003] According to the theory of bistatic radar, when the angle between the transmitter and receiver and the target is greater than a certain value, the radar cross-sectional area of ​​the target will inc...

AI Technical Summary

Problems solved by technology

[0005] When using navigation satellites as the source of opportunity illumination, the spatial position (longitude, latitude and altitude) of MEO (Medium Earth Oribt, MEO, Medium Earth Orbit) and IGSO (Inclined Geosynchronous Satellite Orbit, IGSO, Inclined Geosynchronous Orbit) satellites will change over time However, the change and the target are also moving, leading to two results: first, due to the influence of the curvature of the earth, the navigation satellite is not continuously visible to the target in the time dimension; The angle between the two intersecting lines from the radar to the target (double station angle) is changing dynamically, and a large double station angle cannot be guaranteed in the space dimension

[0006] In the process of navigation and positioning, the traditional navigation receiver, for the signals from different navigation satellites, realizes the separation of multiple navigation signals by transforming the local matching ranging code, and then determines the available navigation satellites, while the target position is uncertain In this case, the available navigation satellites cannot be determined by traditional code matching

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