A high-precision real-time ground pointing control method for a static-orbit remote sensing satellite data transmission antenna

Abstract

A high-precision real-time ground pointing control method for a static-orbit remote sensing satellite data transmission antenna, which relates to the field of high-orbit remote sensing satellite system design; includes the following steps: Step (1), calculating the precise position of the T point of the ground station in the ground-fixed coordinate system ; Step (2), calculate moment t, the conversion matrix C from the inertial coordinate system to the orbital coordinate system oi ; Step (3), calculating the attitude transformation matrix C from the southeast coordinate system to the satellite body coordinate system bd ; Calculate the transformation matrix C from the orbital coordinate system to the southeast coordinate system do ; Calculate the conversion matrix C from the ground-fixed coordinate system to the inertial coordinate system im ; Calculate the position vector T of the ground station in the body coordinate system bm Step (4), setting up satellite antenna direction angle and ground station longitude and latitude mapping relationship; The present invention is by pointing to the ground station in high precision and real-time to the spaceborne data transmission antenna, guarantees that the ground station receives the satellite signal and satisfies the gain requirement while completing the load data High-speed download.

Description

technical field [0001] The invention relates to the design field of a high-orbit remote sensing satellite system, in particular to a high-precision real-time ground pointing control method for a digital transmission antenna of a static-orbit remote sensing satellite. Background technique [0002] With the development of space technology, remote sensing satellites have become an important means of obtaining intelligence information in operations such as military reconnaissance, disaster prevention and mitigation, meteorological survey, and environmental monitoring. At the same time, users have increasingly urgent demands for high temporal and spatial resolution of remote sensing data. It is difficult for mid- and low-orbit remote sensing satellites to achieve continuous imaging observation tasks with high temporal resolution, while high-orbit high-resolution optical remote sensing satellites can The combination of higher pixel resolution and extremely high time resolution, thr...

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Problems solved by technology

Due to the large difference in orbital characteristics between geostationary remote sensing satellites and low-orbit remote sensing satellites, in addition to orbital perturbation, the flatness of the earth also has a greater impact on the high-precision pointing of the antenna. At the same time, the imaging characteristics and attitude control methods of remote sensing satellites in the two orbits Based on the above reasons, it is difficult to realize the high-precision real-time pointing to the ground receiving station of the geostationary remote sensing satellite during the attitude maneuver process.

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