Time synchronization method and device, medium and program product

Abstract

The invention provides a time synchronization method and device, a medium and a program product, and the method comprises the steps: obtaining first ranging information sent by a satellite navigation system and auxiliary information sent by an auxiliary satellite system; the auxiliary information comprises precision orbit data and precision clock error data of the navigation satellite and the auxiliary satellite, second ranging information measured by the auxiliary satellite and first time difference uploaded to the auxiliary satellite by the data center; determining a second time difference between the local time and the navigation time of the ground terminal by using a preset positioning model according to the first distance measurement information and the auxiliary information when positioning calculation is performed on the ground terminal; and correcting the local time according to the first time difference and the second time difference, so that the local time is synchronized with the reference time. The auxiliary satellite system covers the globe, so that the technical problem that time transmission must be performed by depending on a ground communication network in the prior art is solved.

Description

technical field

[0001] The present application relates to the field of satellite technology, and in particular to a time synchronization method, device, medium and program product. Background technique

[0002] Time information is the basis for signal analysis, frequency transmission, synchronization comparison, and information transmission. In the process of navigation and positioning, it is also necessary to synchronize time at each terminal to ensure the accuracy of positioning.

[0003] At present, when synchronizing the time reference, a satellite navigation system, such as a GPS (Global Positioning System, Global Positioning System) system, can be used to perform time synchronization while positioning using a precise single-point positioning technology.

[0004] However, precise point positioning technology needs to rely on the support of ground communication network. The precise orbit information and precise clock difference information of the navigation satellite re...

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