A solar radio burst detection method based on GPS/BDS carrier-to-noise ratio reduction

Abstract

The invention discloses a solar radio storm detection method based on the decrease of the carrier-to-noise ratio of GPS / BDS. The method utilizes the influence of the solar radio storm on the carrier-to-noise ratio of the GPS / BDS signal to detect the solar radio storm and judge whether it occurs Solar radio burst. In this process, first calculate the solar elevation angle of the observation site and perform data preprocessing, then select the "fall point" and "rise point" to determine the trough time interval of a single satellite at a single observation site, and finally integrate multiple satellites and multiple observation sites to determine the detection results of solar radio bursts. The detection method does not rely on radio telescopes, has a high recognition rate, low cost, and can perform all-weather real-time monitoring.

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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