Method for establishing carrier phase frequency standard of GPS (global position system) and BDS (BeiDou Navigation Satellite system)

Abstract

The invention discloses a method for establishing the carrier phase frequency standard for the GPS and the BDS. Due to the fact that a double-mode receiver is provided with an antenna phase center identical to that of a local clock, GPS carrier phase data and BDS carrier phase data are placed into the same filter to obtain more precise clock differential data between the local clock and the GPS system clock as well as the BDS system clock; then the local clock, the GPS clock and the BDS clock are taken as three independent clocks and a clock combination is established, calculation of the time scale of the clock combination is performed through a real-time atomic time algorithm to obtain the clock differential data between the local clock and the combined clock. Compared with the prior art, the method for establishing the carrier phase frequency standard of the GPS and the BDS can avoid the influence of the number and distribution of satellites as well as satellite faults and establish the carrier phase frequency standard of the GPS and the BDS through multiple time source data fusion to obtain more precise clock differential data of local time and UTC (universal time coordinated).

Description

technical field [0001] The invention relates to the field of satellite data communication, in particular to a method for establishing carrier phase frequency standards of a GPS system and a BDS system based on multi-time source data fusion. Background technique [0002] The GPS system / Beidou satellite navigation system (BDS system) signal has good long-term frequency stability, while the crystal oscillator / rubidium atomic frequency standard frequency has a high short-term stability index, and is low in price and small in size. The GPS system / Beidou tame crystal oscillator is used The / rubidium atomic frequency standard can combine the advantages of the two to obtain higher performance indicators. In some secondary time-frequency measurement institutions, there is no need to maintain high-cost atomic time-frequency standards, but a low-cost frequency standard that is an order of magnitude higher than the index of the equipment under inspection is required, and the GPS system / ...

AI Technical Summary

Problems solved by technology

[0006] The technical problem to be solved by the present invention is to provide a method for establishing the carrier phase frequency standard of the GPS system and the BDS system based on multi-time source fusion, so as to solve the problem of too few satellites in the factor system and relatively small geometric distribution of satellites in the traditional federated filtering fusion method. The problem of useful information loss caused by poor or a certain satellite failure and the fusion of dual system time information

Images