High-precision synchronous time service method of multi-point positioning system

Abstract

The invention provides a high-precision synchronous time service method of a multi-point positioning system. The technical scheme includes that a 3G (the third generation) network is used for networking, a high-precision constant-temperature trained clock vibrator is used as a system time reference, a multi-system satellite receiving technology and a multichannel receiving processing technology are adopted, the shortcomings of high wired optical fiber networking engineering difficulty, inconvenience in system debugging and over high cost can be overcome, outdoor erection difficulty caused by a rubidium atom clock or a cesium atom clock is reduced, and coverage dead zones caused by interference of terrains can be avoided effectively. In addition, the problem of short-term failure of an optional system can be solved; reliability in receiving ability of systems is ensured; and synchronous clock errors caused by different elevations can be reduced.

Description

technical field [0001] The present invention relates to an air traffic control monitoring technology, especially a high-precision synchronous timing method for a multipoint positioning system. Background technique [0002] In the prior art, the well-known technology is that the traditional multilateration system adopts constant temperature clock, atomic clock, GNSS, reference transponder or beacon for synchronization. The constant temperature clock vibration is stable in seconds, but the long-term stability is poor. The longer the working time, the worse the synchronous clock, or even a decline in magnitude; the long-term stability of the atomic clock is high, but the cost is high and the installation is difficult. The cost itself; a single GNSS is not restricted by the terrain, but the synchronization clock accuracy is poor, and there is a phenomenon of short-term failure. The positioning accuracy generated by it is far from meeting the needs of the airport scene; The requ...

AI Technical Summary

Problems solved by technology

The constant temperature clock vibration is stable in seconds, but the long-term stability is poor. The longer the working time, the worse the synchronous clock is, or even an order of magnitude decline; the long-term stability of the atomic clock is high, but the cost is high and the installation is difficult. The cost itself; a single GNSS is not restricted by the terrain, but the synchronization clock accuracy is poor, and there is a phenomenon of short-term failure. The positioning accuracy generated by it is far from meeting the needs of the airport scene; The requirements are strict and must be installed within the line of sight. In short, any of the above-mentioned synchronization methods has more or less defects, and cannot achieve the best balance between positioning accuracy, cost, and installation difficulty. deficiencies

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