The invention discloses a solar radio burst spectrum device based on a high speed AD acquisition card to analyze and study solar radio burst at different time and frequency resolutions. The system comprises a parabolic antenna, a low noise amplifier, the high-speed AD acquisition card, a computer, a high-speed solid state hard disk, c language processing software, FPGA internal threshold judgment software, Matlab processing software and labview processing software. The device amplifies a solar radio signal and sends the signal to the FPGA in AD conversion digital quantity. The sum of the power spectrum is acquired. When the sum is greater than a set threshold value, solar radio burst occurs, and the system intensively collects data. When the sum is less than the threshold value, solar radio burst does not occur, and the system sparsely collects data. The data are uploaded to a computer through a PCIe interface and are stored in the solid-state hard disk. At night, FFT operation of different length is carried out on the stored data to acquire a solar radio burst intensity graph at different time and frequency resolutions.

Solar radio burst variable resolution spectrum device based on high speed AD acquisition card and method thereof

The invention provides a solar radio total power radiometer system in radio astronomy protection frequency band based on a broadband detection chip The system works in the radio astronomy protection frequency band and carries out filtering, gating, amplification, detection and analysis on frequency band signals The system is characterized in that the system is formed by connecting a calibration module and a control unit thereof with a radio-frequency signal detection unit The beneficial effects of the system are that the system has the advantages that the system receives less radio interference; and compared with a conventional superheterodyne mode, the detection broadband is wider and large in dynamic range, and the structure is simple and the like

Solar radio total power radiometer system in radio astronomy protection frequency band based on broadband detection chip

The present invention discloses a research and early warning platform for influence on navigation signals caused by solar radio burst, and a method of the research and early warning platform The research and early warning platform comprises a solar radio flow monitoring part, a navigation satellite signal monitoring part and a computer; the solar radio flow monitoring part comprises a radio antenna, an analog receiver system, a calibration system, more than three power-voltage convertors and a data acquisition device; the navigation satellite signal monitoring part includes a navigation antenna and a navigation signal receiver; the solar radio flow monitoring part realizes precise calibration of multi-channel solar radio flow through real-time monitoring on solar radio flow and switching of a noise source, so as to judge whether a solar radio burst event occurs; the navigation satellite signal monitoring part is used for recording information such as current signal quality; and based on solar radio flow data and navigation signal quality data, influence on signal quality caused by the solar radio burst can be judged

Research and early warning platform for influence on navigation signals caused by solar radio burst, and method of research and early warning platform

Disclosed is an early warning platform for a solar radio burst disturbance incident in a navigation system. The early warning platform for the solar radio burst disturbance incident in the navigation system is characterized in that a main reflection face of an existing solar radio radiation telescope is used, a GPS (global position system) satellite antenna is placed on an antenna prime focus feed source, an antenna output end is connected with a one-out-of-three microwave switch, three input ends of the microwave switch are respectively connected with a noise source, an antenna signal and a 50 omega matching load, an output end of the microwave switch is connected with an input end of a low noise amplifier, an output signal of the low noise amplifier is connected with a filter group, an output end of each filter is connected with a corresponding amplification module and a corresponding demodulation module, output ends of the demodulation modules are connected with a main control computer which controls eight channels to collect, and simultaneously the main control computer controls a switch controlled noise source and a 50 omega normal temperature load, which are placed in front of the low noise amplifier, and furthermore a standard calibration system is built. The early warning platform for the solar radio burst disturbance incident in the navigation system can rapidly detect solar radio bursts of an L wave band, and provides alarm information to the navigation systems and especially Beidou systems energetically developed in our country when the navigation systems and especially the Beidou systems are possibly influenced.

Early warning platform for solar radio burst disturbance incident on navigation system

Provided are a self-calibration radio environment testing platform and a testing method thereofThe testing platform is formed by sequentially connecting an antenna and antenna control module, a signal receiving module and a calibration module, wherein the signal receiving module is formed by connecting a low noise amplifier with a frequency spectrometer and a frequency spectrum control computer, the antenna and antenna control module is composed of a test antenna, a controllable rotary table and a rotary table control computer, the calibration module is formed by connecting a microwave switch with an affiliated noise source, a 50-ohm matched load and the low noise amplifier, a noise source is connected with a control switch through a control signal, the control switch is connected with a microwave switch control computer, and one computer host is adopted by the frequency spectrum control computer, the rotary table control computer and the microwave switch control computerThe self-calibration radio environment testing platform and the testing method thereof have the advantages that operation visualization is achieved, data is conveniently recorded, the self-calibration function is achieved, operation is easy, and field operation is easy

Self-calibration radio environment testing platform and testing method thereof

The utility model provides an early warning platform for the interference of solar radio burst on a navigation system. The main reflection face of the existing solar radio telescope is used. A GPS satellite antenna is placed in an antenna main focus feed source. The antenna output accesses a one-out-three microwave switch. Three inputs of the microwave switch are respectively connected with a noise source, an antenna signal and a 50 ohm matching load. The output is connected with the input of a low noise amplifier. An amplifier output signal is connected with a filter group. The output of each filter is connected with a corresponding amplification module and a corresponding detection module. The output of the detection module is connected with a master control computer which controls eight-channel acquisition. The computer controls a switch controllable noise source which is placed in front of the low noise amplifier and a 50 ohm normal temperature load, A standard calibration system is established. According to the utility model, L band solar radio burst can be quickly detected, and warning information of possible influence is provided for the navigation system, and especially a Beidou system which is developed in China at present.

Early warning platform for interference of solar radio burst on navigation system

Most navigation satellites transmit navigation signals within L band, such as GPS, Galileo, BeiDou and so on. Solar radio bursts frequently occurred also with strong emission in L band, which are potential interferences for the navigation service. During the most intense solar radio bursts, the obviously decreasing performances of navigation systems were found. In this work, we get the threshold values for the three communication frequency points by theoretical arithmetic. At the same time, we will set up the real-time solar radio flux monitor system for test and verify the real threshold value in natural space based on 10m solar radio telescope. At last, we will try to build the pre-alarm system combining optical observation data.

L band solar radio burst events — A potential interference for navigation signal and pre-alarm method research

By some experiments' verified, the ELF (extremely low frequency) can influence different levels of the organization of life, such as Biological membranes mast cells, endocrine glands cells and so on. The variation of geomagnetic filed may be a potential endanger factor for human health. In this paper, we will analyze the possibility of pre-alarming the human health events in extremely space weather period. And we will also advance some results of our researches such as the cardiovascular and cerebrovascular events, and Permeability of pleural effusion.

Dong Liang

Papers

Early warning platform for interference of solar radio burst on navigation system

Early warning platform for solar radio burst disturbance incident on navigation system

L band solar radio burst events — A potential interference for navigation signal and pre-alarm method research

Some researches for human health events based in extremely space weather period