Low-orbit satellite radio ranging signal-based single-star positioning and time service method

Abstract

The invention belongs to the field of satellite communication and satellite navigation technologies and discloses a low-orbit satellite radio ranging signal-based single-star positioning and time service method. According to the method, a non-iteration method is used to solve the approximate coordinates and clock skew of a receiver; on the basis of the approximate coordinates and clock skew of thereceiver, an iteration method is adopted to solve the approximate coordinates and clock skew parameter of a user; and an equation ill-conditioned problem is solved through a regularization method, sothat the stable and reliable three-dimensional coordinates and clock skew of the user can be obtained. With the method of the invention adopted, the cost and power consumption of the receiver can bedecreased; and it only needs the receiver to simultaneously receive ranging signals from a low-orbit satellite at a plurality of time points, so that the three-dimensional coordinates and receiver clock skew of the user can be accurately solved. The low-orbit satellite radio ranging signal-based single-star positioning and time service method is applied to the low-cost location service sensor fields such as the Internet of Things, search and rescue.

Description

technical field [0001] The invention belongs to the technical field of satellite communication and satellite navigation, and in particular relates to a single-satellite positioning and timing method based on low-orbit satellite radio ranging signals. Background technique [0002] Currently, the closest prior art: [0003] Low-orbit satellite navigation enhancement technology can significantly improve the convergence time of global satellite positioning system (GNSS) precise positioning, so it has received extensive attention in recent years. The Luojia-1 low-orbit satellite developed by Wuhan University has the ability to broadcast dual-frequency ranging signals. capabilities, successfully demonstrating the possibility of satellite navigation on low-orbit satellites. Hongyan Constellation of Aerospace Science and Technology Group, Hongyun Constellation of Aerospace Science and Industry Corporation and other low-orbit satellite communication constellations all list low-orbit...

AI Technical Summary

Problems solved by technology

The direct calculation of single-star positioning has the problems of non-convergence iteration and ill-conditioned equations, resulting in unstable, unreliable, or even impossible positioning results

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