GNSS data sending and receiving method and system

Abstract

The invention relates to the technical field of satellites, and discloses a GNSS data sending and receiving method and system, which can perform more efficient and safer data transmission in a limited-bandwidth and high-cost satellite broadcast communication mode. The method comprises the following steps: acquiring GNSS data of a plurality of epochs of a plurality of observation satellites of a navigation frequency point, wherein the GNSS data comprises original observation data or non-difference correction data; determining a reference satellite and a reference epoch from the GNSS data; carrying out inter-satellite difference calculation on the GNSS data of each observation satellite and the GNSS data of the reference satellite to obtain corresponding first difference data; performing time difference calculation on the first difference data of each epoch and the first difference data of the reference epoch to obtain corresponding second difference data; and sending the second differential data and the corresponding reference satellite and reference epoch to the server.

Description

technical field [0001] This application relates to the field of satellite technology, in particular to the technology used for GNSS data transmission. Background technique [0002] With the globalization and modernization of satellite navigation represented by the Beidou Navigation Satellite System, especially the popularization of high-precision positioning and service technologies and the increasing improvement of cross-border innovative applications, the ground infrastructure, the amount of information received and transmitted by users, and the quality of services And the need for information security has also increased dramatically. In a more representative example, it can be seen that the number of available satellites for users to receive enhanced services has risen sharply from 6 to 8 in a single system to 30 to 50 in total for the current four major GNSS systems. Not only that, the major GNSS systems, especially the reliance on the error state space correction numbe...

AI Technical Summary

Problems solved by technology

This undoubtedly brings huge bandwidth and traffic costs and performance pressure challenges to the ground network transmission and satellite communication transmission provided by the current service

[0003] The existing data distribution and storage generally follow a number of international general standards, such as the format code of the International Maritime Radio Technical Committee RTCM, especially for observations, differential corrections, reference station parameters, etc. that specifically involve GNSS business data, they will correspond to fields one by one According to the length of the original value, binary conversion and mapping are performed. The existing data distribution and storage methods cannot further effectively compress the storage and bandwidth space, especially when the satellite-based enhanced service distributes business data through satellite broadcasting, which will cause huge Satellite transponder bandwidth rental costs, traffic congestion, and increased delays degrade user experience

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