Solar radio burst detection method based on GPS/BDS carrier-to-noise ratio decrease

Abstract

The invention discloses a solar radio burst detection method based on a GPS/BDS carrier-to-noise ratio decrease. The method detects, by means of the influence of solar radio bursts on the GPS/BDS carrier-to-noise ratio, the solar radio burst, and accordingly determines whether the solar radio burst occurs. In this process, the solar elevation of an observation site is firstly calculated and data is preprocessed. Then, a falling point and a rising point are selected out to determine the trough time interval of a single satellite at a single observation sit. Finally, a detection result of the solar radio burst is determined in combination with a plurality of satellites and a plurality of observation sites. The detection method does not depend on a radio telescope, has a high recognition rateand low cost, and can perform real-time monitoring around the clock.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for detecting solar radio bursts based on GPS / BDS carrier-to-noise ratio reduction. Background technique [0002] As GNSS and other satellite technologies are more and more widely used in modern society, the influence of solar radio on GNSS signals has become an important part that cannot be ignored. Solar radio bursts are a phenomenon of ray enhancement and radio noise sharply increased when a sudden strong disturbance occurs on the sun, and often occur together with solar flares, X-ray bursts, and even proton bursts or cosmic ray bursts. . Solar radio bursts are generally not a single mechanism, but a combined effect of multiple mechanisms. Therefore, they show diversity in terms of burst duration, radiation intensity, spectral characteristics, and polarization. In terms of burst intensity, the greater the intensity of the burst, the less frequently i...

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Problems solved by technology

At the same time, the intensity and frequency of outbursts in different solar radio frequency bands are also different according to different solar activity cycles, reflecting that there are also great differences between solar activity cycles

[0003] The radio interference noise caused by flares covers a wavelength band from millimeters to ten meters or even longer, including the entire frequency band available for satellite navigation, which will cause a general increase in the noise energy within the GNSS signal bandwidth, which will cause the carrier-to-noise ratio of the GNSS receiver Phenomena such as drop, loop tracking error and positioning error increase or even loss of lock

[0004] The main method of traditional detection of solar radio activity is to rely on radio telescopes, but the cost is expensive, the distribution is sparse, and it is impossible to monitor the solar radio in real time around the clock

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