Method for eliminating interference of broadband time domain in pulsar arrival time data

Abstract

The invention relates to the technical field of astrophysics, and in particular relates to a method for eliminating the interference of a broadband time domain in pulsar arrival time data. The method comprises the following steps: observing a pulse signal of a pulsar, obtaining a periodical pulse outline of the pulsar, eliminating a dispersion delay of the periodical pulse outline of the pulsar, observing broadband radio interference in the pulse signal data of the pulsar, and eliminating the interference of the broadband time domain in the pulsar arrival time data. By utilizing the correlation of the broadband time domain interference, the broadband time domain interference is eliminated by virtue of channel subtraction so as to eliminate the broadband time domain interference in the pulsar observation data, a real pulsar outline is obtained, the precision of the pulsar arrival time is improved, and the observation and research of the pulsar arrival time can be more reliably guaranteed.

Description

technical field [0001] The invention relates to the technical field of astrophysics, in particular to a method for eliminating broadband time-domain interference in pulsar time-of-arrival data. Background technique [0002] Pulsar is one of the four major astronomical discoveries in the 1960s. Its discovery has had a huge impact on the development of contemporary astrophysics. Related research work has won the Nobel Prize in Physics twice, which shows that the observation and theory of pulsars The research is of great scientific significance. The observation and research of pulsars has always been a hot spot in the field of astrophysics. It is a "natural laboratory" for studying the properties and laws of matter under extreme physical conditions. [0003] One of the most notable features of pulsars is their extremely stable rotation period. Long-term monitoring results show that the long-term stability of their period is comparable to or even better than that of atomic clock...

AI Technical Summary

Problems solved by technology

[0007] The adaptive filtering method is the most effective interference elimination method in the current pulsar observation, but the adaptive filtering method requires a complex hardware environment, requiring two telescopes, receivers and real-time acquisition terminals, the two telescopes are the main telescope and the reference telescope , this method is effective, but it is very difficult to implement. First, a complex hardware environment needs to be established. At the same time, the adaptive filtering algorithm needs repeated debugging. Currently, it is only used in the Parkes Observatory in Australia.

[0008] Zero-dispersion channel integration and strong interference elimination method are the main methods to eliminate broadband radio interference in pulsar data processing. This method is to use channel zero-dispersion integration to find out the time point with interference, and then use the data at the time point before and after Interpolation is performed to replace the data at this time point, but this method also affects the contour shape of the pulsar to a certain extent while eliminating radio interference

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