Satellite time service method and device and computer readable storage medium

Abstract

The invention discloses a satellite time service method and device and a computer readable storage medium. The satellite time service method comprises the steps of obtaining observation information oftwo or more satellites, calculating various error items affecting the pseudo-range observation by using the obtained satellite observation information, and calculating the geometric distance betweenthe satellites and a receiver by using the pseudo-range observation and preset receiver coordinates; calculating a receiver clock error and an ionospheric error coefficient in a joint manner by usinga pre-established observation equation, the various calculated error items and the calculated geometric distance between the satellites and the receiver; and adjusting the local clock of the receiveraccording to the calculated receiver clock error. According to the invention, joint calculation is performed on the receiver clock error and the ionospheric error coefficient through the pre-established observation equation, thereby improving the accuracy of the receiver clock error, thus improving the accuracy of PPS (Pulse Per Second), and effectively reducing influence imposed on the time service accuracy of the receiver by the ionospheric error.

Description

technical field [0001] The invention relates to the technical field of satellite navigation, in particular to a satellite timing service method and device, and a computer-readable storage medium. Background technique [0002] With the rapid development of modern science and information technology, all walks of life, such as military, aerospace, deep space exploration, communication, transportation, electric power, finance, national defense, etc., have higher and higher requirements for time and frequency accuracy, and high-precision time references have become One of the basic guarantee platforms in the fields of communication, electric power, radio and television, security monitoring, industrial control, etc. The use of global navigation satellite system (Global Navigation Satellite System, GNSS) satellite timing is currently the most effective way for long-distance and large-scale high-precision time synchronization. [0003] Usually, the satellite timing device adopts a ...

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Problems solved by technology

[0003] Usually, the satellite timing device adopts a single system and single frequency configuration. For example, the L1 frequency point (1575.42MHZ) of GPS is used for timing. The timing accuracy of this satellite timing device is not high, and it cannot meet the requirements of 5G communication for timing accuracy. The main reason is The ionospheric delay error is calculated by the Klobuchar model. There is a certain error between the ionospheric model value and the true value, which leads to an error in the calculation of the receiver clock error, which in turn leads to the Pulse Per Second (PPS) PPS) is not accurate

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