Pulsar Time Signal Ground Reconstruction System

Abstract

The invention provides a pulsar time signal ground reproduction system. The receiver points to a pulsar through an antenna and collects the pulse signal radiated by the pulsar; the achromatic system performs dedispersion processing on the received pulse signal. The data is collected and input into the data processing system; the data processing system processes the data according to the set time interval to obtain an integral pulse profile, which is cross-correlated with the standard pulse profile template of the same pulsar to determine the time when the pulse signal arrives at the antenna. , and calculate the deviation of the crystal oscillator time relative to the pulsar time; the servo system uses the frequency locking and phase locking technology to calibrate the deviation of the crystal oscillator relative to the pulsar time, and finally outputs the physical time-frequency signal through the crystal oscillator. The invention can provide support for the establishment and application of the ground system in pulsar time.

Description

technical field [0001] The invention belongs to the field of time-frequency technology, and relates to a standard time-frequency physical signal that receives a periodic pulse signal radiated by a pulsar and reproduces and outputs the standard time-frequency physical signal unified to the pulsar on the ground. Background technique [0002] Atomic time is the basis for maintaining the current time reference. Atomic time depends on the generation of atomic clocks. The basic principle of atomic clocks is to calibrate the frequency of crystal oscillators or lasers by using the transition frequency of atomic or molecular energy levels as a reference signal, and finally make it output a standard frequency signal. device. figure 1 It is the basic principle diagram of the cesium atomic clock. The characteristic of the atomic clock is that the final output standard frequency signal has the characteristic of atomic level transition frequency. According to the different types of atoms...

AI Technical Summary

Problems solved by technology

Atomic clocks are characterized by high short-term frequency stability, but long-term frequency drift, which requires regular comparison and calibration with external reference frequency sources

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