Position selection method for observing and tracking small body based on Sun-Earth libration point

Abstract

The invention discloses a position selection method for observing and tracking a small body based on a Sun-Earth libration point, which belongs to the technical field of aeronautics and astronautics. The method comprises the following steps of: acquiring five dynamic libration points by a three-body system consisting of space observation spacecrafts, the Sun and the Earth; selecting a qusi-periodic orbit near the L2 point as the location point of the first space observation spacecraft; and selecting the L4 point and the L5 point as the location points of the second space observation spacecraft and the third space observation spacecraft so as to construct the observation network of the three space observation spacecrafts to observe and track the small body in combination. In comparison to the prior art, the method provided by the invention can observe and track the small body for a long period, and has the advantages of good stability, less energy consumption for keeping the positions of the spacecrafts, long observation and tracking arc segments, and so on.

Description

technical field [0001] The invention belongs to the field of aerospace technology, and relates to a position selection method for a space vehicle for observing and tracking small celestial bodies. Background technique [0002] The long-period observation and tracking of small celestial bodies is a key link in the detection and defense of small celestial bodies. Due to the influence of the earth's revolution and rotation, atmospheric complex turbulence, refraction, scattering, and the absorption of ultraviolet rays by the ozone layer, the traditional methods of ground observation and tracking of small celestial bodies cannot meet the needs of rapid discovery, accurate observation, and long-period tracking of small celestial bodies. . [0003] Space observation based on spacecraft, because it can avoid the influence of the earth's atmosphere and geomagnetic field, greatly improves the resolution, and has become one of the important research directions for the development of d...

AI Technical Summary

Problems solved by technology

The method of placing space observation spacecraft in near-Earth orbit and quasi-periodic orbit near the Earth-Sun L2 equilibrium point increases the arc section for observation and tracking of small celestial bodies, but due to the geometric relationship between the Earth’s orbit and the orbit of small celestial bodies And the limitation of observation angle makes it difficult to observe and track small celestial bodies for a long time

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