Low earth orbit satellite capturing and tracking method based on VICTS antenna

Abstract

The invention provides a low-orbit satellite capturing and tracking method based on a VICTS antenna, and belongs to the technical field of satellite finding. The method comprises the following steps: according to ephemeris data of a low-orbit satellite, performing conical scanning through a VICTS antenna to capture satellite signals, mapping a conical scanning result of the VICTS antenna to a three-dimensional space to obtain a paraboloid of the antenna in the three-dimensional space, fitting the paraboloid by using a gradient descent method, and determining an extreme point of the paraboloid; and then the antenna direction of the VICTS antenna is optimized and adjusted according to the extreme point of the paraboloid. Then trajectory modeling is carried out according to ephemeris data of a low-orbit satellite, and the translation amount of a coordinate system is calculated; and performing translation transformation on the antenna pointing coordinate system according to the coordinate system translation amount to obtain a new antenna pointing coordinate system. According to the method, the interference of the high-speed movement of the satellite on the optimization process is effectively eliminated, the relationship between the signal strength and the antenna direction can be accurately fitted, and the signal capturing capability and tracking precision of the low-orbit satellite are improved.

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