Satellite capturing and tracking method for VSAT (Very Small Aperture Terminal) antenna system with physical level platform

Abstract

The invention proposes a satellite capturing and tracking method for a VSAT (Very Small Aperture Terminal) antenna system with a physical level platform. The method is applicable to a control object such as an antenna system in a direction, pitching and rolling three-axis (A-E-C) pedestal form. The physical level platform is built in the antenna system, a local geographic coordinate system is also built on the physical level platform, thus, the theoretical direction and the pitching angle of an antenna points relative to a fixed local geographic coordinate system are consistent with the direction and the pitching angle of the antenna points relative to a mobile local geographic coordinate system on the physical level platform; and an electric shaft of the antenna is controlled to accurately point a satellite by a mode similar to a fixed antenna on the basis, and the satellite is automatically tracked when a carrier moves. According to the method provided by the invention, heading attitude participation operation is not needed to perform by the carrier in real time during the capturing and tracking process, thus, a shipborne compass system is not needed to install on the carrier, the environment condition requirement of the carrier is reduced, and the method is beneficial for promotion and application in a small-tonnage civil ship or a water carrier with limited equipment budge and equipment resource.

Description

technical field [0001] The invention relates to the technical field of satellite mobile tracking communication. The invention relates to a VSAT antenna satellite acquisition and tracking method which is especially suitable for mobile carrier satellite communication such as ships. Background technique [0002] VSAT is the abbreviation of "Very Small Aperture Terminal", which means "Very Small Aperture Antenna Earth Station". And the mobile VSAT system is what we usually call a "communication in motion" system. Its function is to track communication platforms such as geosynchronous communication satellites in real time through the mobile VSAT system during the movement of various carriers such as automobiles, ships, and airplanes, and continuously provide various communication services such as data, voice, and video for the carrier. As a terminal product that provides Internet access for various sports carriers, the mobile VSAT system has a broad market prospect. At present...

AI Technical Summary

Problems solved by technology

The scanning tracking in the tracking technology obtains the pointing error of the antenna through an additional scanning action in the two-dimensional space, so there is a loss in gain and the algorithm is more complicated

The tracking accuracy and speed of the monopulse tracking method are high, but the structure of the monopulse feed source is complex and expensive

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