Window calculation method for low-orbit satellite tracking non-orbiting highly dynamic target

Abstract

The invention provides a window calculation method for a low-orbit satellite tracking a non-orbiting highly dynamic target. Known conditions, constrained conditions and a calculation optimization target of a satellite tracking window are made clear; primary screening and fine screening are carried out; the window of the low-orbit satellite that tracks the highly dynamic target is calculated and optimized by taking a satellite orbit, a movement track of the highly dynamic target, the relative geometric relation between the satellite and the target, satellite visibility condition of a ground measurement and control station, space weather condition, and interference of the sun and moon on a satellite star sensor into consideration comprehensively; problems that the window of the satellite ischangeable and hard to determine are solved; and calculation is simple and the engineering availability is high.

Description

Technical field [0001] The invention belongs to the field of aerospace measurement and control, and relates to a time window calculation method for low-orbit satellites to track non-orbital high dynamic targets. Background technique [0002] Earth observation by spacecraft is a part of the space information system and has important applications in land and resources surveys and fire monitoring. Space-based ground-to-ground reconnaissance has the advantages of wide observation range, long duration, not restricted by airspace and national boundaries, not involving the safety of users, and not easy to cause military confrontation and conflict. [0003] The satellite runs in low earth orbit at a speed of about 7.9km / s. In order to observe a specific target, it must continuously adjust its attitude during the orbital flight to achieve continuous tracking of the target. When the target is in a state of high-speed maneuvering, the uncertainty of the target's flight trajectory further inc...

AI Technical Summary

Problems solved by technology

[0005] At present, domestic satellite tracking and monitoring ground targets mainly focus on stationary targets and slow-moving targets. Most of the attitude and tracking window calculation methods adopted only consider the moving state of the satellite in the fixed coordinate system of the earth, and do not calculate the maneuvering status of the ground target. Suitable for fast-flying and maneuverable high-dynamic targets such as aircraft

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