CN101806911A - Ionosphere scintillation monitoring method and ionosphere scintillation monitor - Google Patents
Ionosphere scintillation monitoring method and ionosphere scintillation monitor Download PDFInfo
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Abstract
The invention provides an ionosphere scintillation monitoring method and an ionosphere scintillation monitor. The monitoring method has the following steps: using continuous signals emitted by a stationary meteorological satellite as beacons; receiving satellite signals by an antenna; performing high frequency down-conversion treatment on the signals; performing a first medium frequency down-conversion treatment; collecting signal amplitude and phase information, and inputting the collected signal amplitude and phase information to a digital signal processor for processing; acquiring the signal amplitude and phase scintillation information by the digital signal processor and outputting to a computer; and calculating the scintillation parameters by the computer. The monitor is composed of the antenna, a high frequency amplifier, a first medium frequency amplifier, a second medium frequency amplifier, a detector, a first A/D converter, a phase discriminator, a second A/D converter, the digital signal processor and the computer. The monitor is characterized by simple processing and good monitoring effect.
Description
Technical field
The present invention relates to technical field of satellite communication, particularly relate to a kind of ionospheric scintillation monitoring method and ionospheric scintillation monitor based on the geostationary meteorological satellite (GMS) signal.
Background technology
Ionosphere is the important component part of solar-terrestrial physics environment and geospace, and the unevenness of ionospheric electron density can cause the random fluctuation of specific inductive capacity and refractive index.When electromagnetic wave is propagated in such medium, can cause the change in travel path and travel-time, make the amplitude, phase place of signal and quick fluctuations takes place at the receiving antenna place ray angle of arrival to cause signal dropout, this phenomenon is called as ionospheric scintillation.
Can improve the understanding of people to the research of ionospheric scintillation to geospace and solar-terrestrial physics environment, help the understanding of people's reinforcement to space environment, development has forecast space weather pattern meaning, that take a broad view of better, knowledge physics, experience, statistics is combined, finally form a chain of causation model that whole space weather generation, development, ground effect can be described.The diastrous weather incident that occurs in the space environment is carried out more comprehensively more monitoring, diagnosis, prediction and the forecast of science, predict time of origin, the order of severity of the disastrous incident of people and can cause what kind of consequence, alleviate and avoid space diastrous weather that the high-tech technological system of costliness is caused damage, for departments such as space flight, communication, navigation, resource, electric power, ecology, medical science, scientific research, aerospace safety and national defence provide regional and global background with the time change environmental pattern.Therefore, ionospheric scintillation research is had great importance.
Carrying out ionospheric scintillation, to monitor optimal method be to send monochromatic beacon by synchronous satellite, set up the mode of monitoring net monitors on ground, but because it is too high to send monochromatic beacon source cost by synchronous satellite specially, the domestic and international at present monitoring method to ionospheric scintillation mainly is to utilize gps signal and satellite TV signal.Owing to do not need special beacon source, utilize gps signal and satellite TV signal to carry out the ionospheric scintillation monitoring and can reduce the monitoring cost effectively.But the characteristics of gps signal and satellite TV signal have caused its monitoring means not ideal enough.GPS ionospheric scintillation monitor can be monitored, the analysis amplitude is glimmered and phase scintillation.Because the relative earth movements of gps satellite, the variation of its flicker has comprised the factor in time and space simultaneously, and the processing of data is comparatively complicated.Utilize the ionospheric scintillation monitoring of satellite TV signal, because the phase change more complicated of TV signal itself generally can only be monitored the amplitude flicker.
Therefore, at weak point of the prior art, provide a kind of and handle the ionospheric scintillation monitoring method simple, that monitoring effect is good and the ionospheric scintillation monitor is very necessary.
Summary of the invention
The objective of the invention is to avoid the deficiencies in the prior art part and a kind of ionospheric scintillation monitoring method and ionospheric scintillation monitor are provided, this ionospheric scintillation monitoring method and ionospheric scintillation monitor are based on the geostationary meteorological satellite (GMS) continuous signal and monitor processing, have simple, the monitoring effect good characteristics handled.
Purpose of the present invention realizes by following technical measures:
A kind of ionospheric scintillation monitoring method includes following steps:
(1) beacon detects and determines, the ionospheric scintillation monitor detects the continuous signal of the geostationary meteorological satellite (GMS) emission of antenna reception, described continuous signal is defined as the beacon of ionospheric scintillation monitor monitoring;
(2) working signal receives, and described antenna receives the signal of described geostationary meteorological satellite (GMS) emission;
(3) high frequency down-converted, the signal that described antenna is received carries out the high frequency down-converted, to reduce the frequency of described signal;
(4) first intermediate frequency down-converted, the signal after the high frequency down-converted are transported to first intermediate frequency amplifier and are carried out the first intermediate frequency down-converted,
In this step (4), the described first intermediate frequency amplifier setting can be an intermediate frequency amplifier of not being with automatic gain control, and the described first intermediate frequency down-converted can be with automatic gain control;
(5) signal amplitude and phase information collection are carried out signal amplitude information collection and phase information collection to the signal after the described first intermediate frequency down-converted, and described signal amplitude and position information are transported to digital signal processor processes, comprising:
(51) signal amplitude information collection after a road of the signal after the described first intermediate frequency down-converted is transported to the wave detector detection, after transporting to first A/D converter and doing mould/number conversion, is transported to digital signal processor as signal amplitude information, and
(52) signal phase information acquisition, another road of signal after the described first intermediate frequency down-converted is transported to second intermediate frequency amplifier and is carried out the second intermediate frequency down-converted, after the signal after the described second intermediate frequency down-converted is transported to the phase detector phase demodulation, transport to second A/D converter and do to transport to described digital signal processor as signal phase information after mould/number conversion;
(6) obtain signal amplitude and phase scintillation information, described digital signal processor is handled picked up signal amplitude and phase scintillation information to the described signal amplitude information and the described signal phase information of input, and transports to computing machine;
(7) flicker calculation of parameter, described computing machine carries out the calculating of amplitude scintillation intensity and phase place standard deviation respectively according to described signal amplitude flicker information and described signal phase flicker information, and output or show described amplitude scintillation intensity and phase place standard deviation.
Preferably, in the above-mentioned steps (1), the continuous signal that is specially described detection geostationary meteorological satellite (GMS) emission is a telesignalisation, and with the beacon of described telesignalisation as the monitoring of ionospheric scintillation monitor.
Another is preferred, in the above-mentioned steps (6), describedly obtains signal amplitude and phase scintillation information specifically comprises:
(61) obtain the signal amplitude flicker information, described signal amplitude information is carried out the processing of amplitude flicker information obtain the signal amplitude flicker information, and transport to described computing machine; And
(62) obtain the signal phase flicker information, the signal of input is carried out successively the original phase processing of demodulating data source code, regeneration modulated signals, reproduction signal, the original phase information of picked up signal, then the original phase information of described signal and the signal phase information of described input are compared, reject the composition of modulated signals, obtain the signal phase flicker information and transport to described computing machine.
Above, above-mentioned beacon is the professional telesignalisation of geostationary meteorological satellite (GMS), the receive frequency of described antenna is 1705.2MH.
Further, the frequency of the above-mentioned first intermediate frequency down-converted is 152.5M.
Further, above-mentioned digital processing unit is set to the scene can be all over journey gate array (FPGA) processor, and described numerical processor chip is the EP2C35F44C8 chip.
A kind of ionospheric scintillation monitor comprises being provided with antenna, radio-frequency amplifier, first intermediate frequency amplifier, second intermediate frequency amplifier, wave detector, first A/D converter, phase detector, second A/D converter, digital signal processor and computing machine,
Described first intermediate frequency amplifier is provided with first output terminal and second output terminal, and described digital signal processor is provided with signal amplitude information input end and signal phase information input terminal,
The monitoring beacon of this ionospheric scintillation monitor is the continuous signal of geostationary meteorological satellite (GMS), and obtains the ionospheric scintillation signal by the monitor satellite signal,
Described antenna receives the signal of geostationary meteorological satellite (GMS) emission, and described antenna is connected in described radio-frequency amplifier input end, and described radio-frequency amplifier output terminal connects with the described first intermediate frequency amplifier input end,
First output terminal of described first intermediate frequency amplifier connects with described wave detector input end, and described wave detector output terminal connects with the described first A/D converter input end,
The described first A/D converter output terminal connects with the signal amplitude information input end of described digital signal processor,
Second output terminal of described first intermediate frequency amplifier connects with the described second intermediate frequency amplifier input end, and the described second intermediate frequency amplifier output terminal connects with described phase detector input end,
Described phase detector output terminal connects with the described second A/D converter input end,
The described second A/D converter output terminal connects with the signal phase information input terminal of described digital signal processor,
Described digital signal processor output terminal connects with described computing machine.
Preferably, above-mentioned digital signal processor is provided with signal amplitude information processing unit and signal phase information process unit,
Described signal amplitude information processing unit is provided with amplitude flicker information processing unit, and described amplitude flicker information processing unit input end connects with the described first A/D converter output terminal, and described amplitude flicker information processing unit output terminal connects with described computing machine;
Described signal phase information process unit comprises that the original phase unit of demodulating data source code unit, regeneration modulated signals unit, reproduction signal becomes subdivision with the rejecting modulated signals, described rejecting modulated signals becomes subdivision to be provided with the first input end and second input end
Described demodulating data source code unit input end, described rejecting modulated signals become the first input end of subdivision to connect with the described second A/D converter output terminal, and described demodulating data source code unit output terminal connects with described regeneration modulated signals unit input end,
Described regeneration modulated signals unit output terminal connects with the original phase unit input end of described reproduction signal,
The original phase unit output terminal of described reproduction signal becomes second input end of subdivision to connect with described rejecting modulated signals,
Described rejecting modulated signals becomes the subdivision output terminal to connect with described computing machine.
Above, above-mentioned digital signal processor is set to the scene can be all over journey gate array (FPGA) processor, and described processor chips are the EP2C35F44C8 chip.
Above, the monitoring beacon of above-mentioned ionospheric scintillation monitor is the professional telesignalisation of geostationary meteorological satellite (GMS), and described antenna is that receive frequency is the antenna of 1705.2MH, and described first intermediate frequency amplifier is the intermediate frequency amplifier of frequency of operation 152.5M.
A kind of ionospheric scintillation monitoring method of the present invention, include following steps: (1) beacon detects and determines, the ionospheric scintillation monitor detects the continuous signal of the geostationary meteorological satellite (GMS) emission of antenna reception, continuous signal is defined as the beacon of ionospheric scintillation monitor monitoring; (2) working signal receives, and antenna receives the signal of described geostationary meteorological satellite (GMS) emission; (3) high frequency down-converted, the signal that antenna is received carries out the high frequency down-converted, to reduce the frequency of signal; (4) first intermediate frequency down-converted, the signal after the high frequency down-converted are transported to first intermediate frequency amplifier and are carried out the first intermediate frequency down-converted; (5) signal amplitude and phase information collection, signal after the first intermediate frequency down-converted is carried out signal amplitude information collection and phase information collection, and with signal amplitude and the position information transport to digital signal processor processes, comprising: (51) signal amplitude information collection, after a road of signal after the first intermediate frequency down-converted is transported to the wave detector detection, after transporting to first A/D converter and doing mould/number conversion, transport to digital signal processor as signal amplitude information, and (52) signal phase information acquisition, another road of signal after the first intermediate frequency down-converted is transported to second intermediate frequency amplifier and is carried out the second intermediate frequency down-converted, after the signal after the second intermediate frequency down-converted is transported to the phase detector phase demodulation, transport to second A/D converter and do to transport to digital signal processor as signal phase information after mould/number conversion; (6) obtain signal amplitude and phase scintillation information, digital signal processor is handled picked up signal amplitude and phase scintillation information to the signal amplitude information and the signal phase information of input, and transports to computing machine; (7) flicker calculation of parameter, computing machine carries out the calculating of amplitude scintillation intensity and phase place standard deviation respectively according to signal amplitude flicker information and signal phase flicker information, and output or demonstration amplitude scintillation intensity and phase place standard deviation.This ionospheric scintillation monitoring method, the continuous signal by utilizing geostationary meteorological satellite (GMS) emission be as beacon, with gps signal relatively owing to be the geostationary meteorological satellite (GMS) signal, so the variation of its flicker only comprises time factor, therefore, Signal Processing is simple.Compare with satellite TV signal, because the bit rate of geostationary meteorological satellite (GMS) continuous signal is lower, bit rate for its professional telesignalisation of Fengyun II meteorological satellite only is 2K, and in fact accurately as can be known, therefore can be by the original phase of reproduction signal, reject the composition of modulation signal, obtain phase scintillation information, effect is near the level of monochromatic beacon source.Therefore, this ionospheric scintillation monitoring method has the characteristics simple, that effect is good of handling.
A kind of ionospheric scintillation monitor of the present invention, comprise and be provided with antenna, radio-frequency amplifier, first intermediate frequency amplifier, second intermediate frequency amplifier, wave detector, first A/D converter, phase detector, second A/D converter, digital signal processor and computing machine, first intermediate frequency amplifier is provided with first output terminal and second output terminal, digital signal processor is provided with signal amplitude information input end and signal phase information input terminal, and the monitoring beacon of this ionospheric scintillation monitor is the continuous signal of geostationary meteorological satellite (GMS), and can obtain the ionospheric scintillation signal by the monitor satellite signal, antenna receives the signal of geostationary meteorological satellite (GMS) emission, antenna is connected in the radio-frequency amplifier input end, the radio-frequency amplifier output terminal connects with the first intermediate frequency amplifier input end, first output terminal of first intermediate frequency amplifier connects with the wave detector input end, the wave detector output terminal connects with the first A/D converter input end, the first A/D converter output terminal connects with the signal amplitude information input end of digital signal processor, second output terminal of first intermediate frequency amplifier connects with the second intermediate frequency amplifier input end, the second intermediate frequency amplifier output terminal connects with the phase detector input end, the phase detector output terminal connects with the second A/D converter input end, the second A/D converter output terminal connects with the signal phase information input terminal of digital signal processor, and the digital signal processor output terminal connects with computing machine.This ionospheric scintillation monitor, the continuous signal by utilizing geostationary meteorological satellite (GMS) emission be as beacon, with gps signal relatively owing to be the geostationary meteorological satellite (GMS) signal, so the variation of its flicker only comprises time factor, therefore, the processing of digital signal processor is simple.Compare with satellite TV signal, because the bit rate of geostationary meteorological satellite (GMS) continuous signal is lower, bit rate for its professional telesignalisation of Fengyun II meteorological satellite only is 2K, and in fact accurately as can be known, the original phase that therefore can reappear signal by digital signal processor, reject the composition of modulation signal, obtain phase scintillation information, effect is near the level of monochromatic beacon source.Therefore, this ionospheric scintillation monitor has the advantages that data processing is simple, monitoring effect is good.
Description of drawings
The invention will be further described in conjunction with the accompanying drawings, but the content in the accompanying drawing does not constitute any limitation of the invention.
Fig. 1 is the synoptic diagram of a kind of ionospheric scintillation monitoring method of the present invention;
Fig. 2 be among Fig. 1 a kind of ionospheric scintillation monitoring method the processing procedure synoptic diagram of digital signal processor;
Fig. 3 is the structural representation of a kind of ionospheric scintillation monitor of the present invention;
Fig. 4 is the structural representation of the digital signal processor of a kind of ionospheric scintillation monitor among Fig. 3.
Embodiment
With the following Examples the present invention is further described.
Embodiment 1
A kind of ionospheric scintillation monitoring method of the present invention comprises the following steps: as shown in Figure 1
(1) beacon detects and determines, the ionospheric scintillation monitor detects the continuous signal of the geostationary meteorological satellite (GMS) emission of antenna reception, described continuous signal is defined as the beacon of ionospheric scintillation monitor monitoring.Because geostationary meteorological satellite (GMS) is static relatively over the ground, therefore, select the beacon of the signal of geostationary meteorological satellite (GMS) emission as the monitoring of ionospheric scintillation monitor, its maximum advantage is to carry out continuous monitoring to the monitored area, obtains monitored area scintillation time Changing Pattern and weather statistics accurately.The continuous signal of selecting the geostationary meteorological satellite (GMS) emission is as beacon, need be in order not make the satellites transmits beacon source on satellite to the ionospheric scintillation monitoring and in that special equipment is set separately, therefore, lower cost.Be convenient to follow-up Treatment Analysis because the bit rate of telesignalisation is low, so better as the beacon effect with the telesignalisation of selecting the geostationary meteorological satellite (GMS) emission.
(2) working signal receives, and antenna receives the signal of geostationary meteorological satellite (GMS) emission.The antenna of ionospheric scintillation monitor is arranged on ground, to receive the telesignalisation of satellites transmits.When the signal of satellites transmits passed ionosphere, the ionosphere irregular structure can cause the variation of signal amplitude and phase place, and the signal after the variation is received by the antenna on ground.Because for specific satellite, its original signal of launching can be predicted, therefore, can be by calculating the original phase of picked up signal.The amplitude when signal is arrived ground and the original phase comparison process of phase place and signal just can obtain the amplitude and the phase information of ionospheric scintillation.
(3) high frequency down-converted, the signal that antenna is received carries out the high frequency down-converted to reduce the frequency of signal.The signal of satellites transmits will could arrive ground through very long distance, therefore, can effectively arrive ground in order to guarantee signal, and satellite-signal has all passed through twice when launching or upconversion process repeatedly.So the frequency of the signal that antenna receives is often very high, be not easy to handle.This step is carried out the high frequency down-converted to the signal that antenna receives, and can reduce the frequency of signal, is convenient to follow-up processing.
(4) first intermediate frequency down-converted are transported to first intermediate frequency amplifier through the signal after the high frequency down-converted and are carried out the first intermediate frequency down-converted.First intermediate frequency amplifier can be set to not be with the intermediate frequency amplifier of automatic gain control, and the first intermediate frequency down-converted can be with automatic gain control.Usually the frequency conversion amplifier has automatic gain control function, but first intermediate frequency amplifier among the present invention is not with automatic gain control, the signal of the first intermediate frequency down-converted carries amplitude random fluctuation information, so the amplitude state the when amplitude information of the signal after the first intermediate frequency down-converted still keeps antenna to receive.Make that the amplitude information of signal is more obvious.
(5) signal amplitude and phase information collection are carried out signal amplitude information collection and phase information collection to the signal after the first intermediate frequency down-converted, and with signal amplitude and phase information digital signal processor for processing, comprising:
(51) signal amplitude information collection after the signal one tunnel after the described first intermediate frequency down-converted is transported to the wave detector detection, is imported first A/D converter and is done to transport to digital signal processor as signal amplitude information after mould/number conversion; And
(52) signal phase information acquisition, another road of signal after the described first intermediate frequency down-converted is transported to second intermediate frequency amplifier and is carried out the second intermediate frequency down-converted, signal after the described second intermediate frequency down-converted is transported to phase detector behind described phase detector phase demodulation, imports second A/D converter and does to transport to described digital signal processor as signal phase information after mould/number conversion.
(6) obtain signal amplitude and phase scintillation information, digital signal processor is handled picked up signal amplitude and phase scintillation information to the signal amplitude information and the signal phase information of input, and transports to computing machine.Detailed process, as shown in Figure 2, comprising
(61) obtain the signal amplitude flicker information, described signal amplitude information is carried out the processing of amplitude flicker information obtain the signal amplitude flicker information, and transport to described computing machine; And
(62) obtain the signal phase flicker information, the signal of input is carried out successively the original phase processing of demodulating data source code, regeneration modulated signals, reproduction signal, the original phase information of picked up signal, then, the original phase information of described signal and the signal phase information of described input are compared, reject the composition of modulated signals, obtain the signal phase flicker information, and described signal phase flicker information is transported to described computing machine.
(7) flicker calculation of parameter, computing machine carries out the calculating of amplitude scintillation intensity and phase place standard deviation respectively according to signal amplitude flicker information and signal phase flicker information, and output or demonstration amplitude scintillation intensity and phase place standard deviation.
A kind of ionospheric scintillation monitoring method provided by the invention, the continuous signal of utilizing the geostationary meteorological satellite (GMS) emission compare with gps signal as beacon, owing to be the geostationary meteorological satellite (GMS) signal, so the variation of its flicker only comprises time factor, therefore, Signal Processing is simple.Compare with satellite TV signal, because the bit rate of geostationary meteorological satellite (GMS) continuous signal is lower, and in fact accurately as can be known, therefore can be by the original phase of reproduction signal, reject the composition of modulation signal, obtain phase scintillation information, effect is near the level of monochromatic beacon source.Therefore, this ionospheric scintillation monitoring method has the characteristics simple, that effect is good of handling.
A kind of ionospheric scintillation monitoring method of the present invention comprises the following steps:
(1) beacon detects and determines, the continuous signal that the ionospheric scintillation monitor detects the geostationary meteorological satellite (GMS) emission of antenna reception is the professional telesignalisation of Fengyun II meteorological satellite, and should the business telesignalisation be defined as the beacon that the ionospheric scintillation monitor is monitored.
Fengyun II meteorological satellite (FY2) series is the geostationary meteorological satellite (GMS) of China's independent development, realized double star FY2-C and FY2-D networking observation at present, the C star is positioned on the about 36000 kilometers geostationary orbit in Ullage ground on the east longitude 123.5 degree equator, and the D star is positioned east longitude 105 and spends on the about 36000 kilometers geostationary orbit in Ullage ground on the equator.When the signal of Fengyun II meteorological satellite passed through ionosphere, the ionosphere irregular structure can cause the variation of signal amplitude and phase place.If amplitude and the phase place of energy measurement when signal arrives ground, and know the original phase of signal, just can obtain the amplitude and the phase information of ionospheric scintillation.
The downgoing signal of Fengyun II meteorological satellite comprises original cloud atlas, broadening cloud atlas, professional remote measurement, engineering remote measurement, distance measuring signal etc., and present embodiment has been selected the beacon of the professional telesignalisation of Fengyun II meteorological satellite as the monitoring of ionospheric scintillation monitor for use.Because professional telesignalisation is a continuous uninterrupted signal, this signal adopts the mode of secondary modulation when satellites transmits, the subcarrier of the 32KHz that the data of 2Kbps bit rate are modulated in the mode of DPSK, again subcarrier is modulated in the carrier wave that frequency is 1702.5MHz in the PM mode, its spectrum component simple and stable relatively is fit to carry out the ionospheric scintillation monitoring.
(2) working signal receives, and the antenna of ionospheric scintillation monitor receives the professional telesignalisation of Fengyun II meteorological satellite emission.
Because the frequency of the professional telesignalisation of Fengyun II meteorological satellite emission is 1702.5MHz, therefore, the receive frequency of antenna also is set to 1702.5MHz in this correspondence.
(3) high frequency down-converted, the signal that antenna is received carries out the high frequency down-converted to reduce the frequency of signal.
(4) first intermediate frequency down-converted are transported to first intermediate frequency amplifier through the signal after the high frequency down-converted and are carried out the first intermediate frequency down-converted, and the frequency that the first intermediate frequency down-converted is chosen is 152.5M.The frequency configuration of first intermediate frequency amplifier is the intermediate frequency amplifier that the 152.5M and first intermediate frequency amplifier are set to not to be with automatic gain control, carries amplitude random fluctuation information through the signal of the first intermediate frequency down-converted.
The first intermediate frequency down-converted is chosen the frequency of 152.5M, be for make the ionospheric scintillation monitor can with the shared identical antenna of broadening cloud atlas receiver, high frequency and first intermediate-frequency channel of Fengyun II meteorological satellite.At present, the broadening cloud atlas receiving station of Fengyun II meteorological satellite spreads all over the country, its frequency is 1687.5M, the little 15M of frequency than telesignalisation, first intermediate frequency of present widely used broadening cloud atlas receiver is 137.5M, therefore, the frequency of the first intermediate frequency down-converted is selected in 152.5M, just can realizes the passage of the broadening cloud atlas receiver compatible front-end of ionospheric scintillation monitor and Fengyun II meteorological satellite.Help reducing the monitoring cost.
(5) signal amplitude and phase information collection are carried out the range signal amplitude information to the signal after the first intermediate frequency down-converted and are gathered and the phase information collection, and with signal amplitude and phase information digital signal processor for processing, comprising:
(51) signal amplitude information collection after the signal one tunnel after the described first intermediate frequency down-converted is transported to the detection of detector via wave detector, is imported first A/D converter and is done to transport to digital signal processor as signal amplitude information after mould/number conversion; And
(52) signal phase information acquisition, another road of signal after the described first intermediate frequency down-converted is transported to second intermediate frequency amplifier and is carried out the second intermediate frequency down-converted, signal after the described second intermediate frequency down-converted is transported to phase detector behind described phase detector phase demodulation, imports second A/D converter and does to transport to described digital signal processor as signal phase information after mould/number conversion.
(6) obtain signal amplitude and phase scintillation information, digital signal processor is handled picked up signal amplitude and phase scintillation information and signal amplitude and phase scintillation information is transported to computing machine the signal amplitude information and the signal phase information of input.Digital signal processor can realize that the chip model of employing can be EP2C35F44C8 all over journey gate array (FPGA, FieldProgrammable Gate Array) processor by the scene.
Detailed process comprises
(61) obtain the signal amplitude flicker information, described signal amplitude information is carried out the processing of amplitude flicker information obtain the signal amplitude flicker information, and described signal amplitude flicker information is transported to described computing machine; And
(62) obtain the signal phase flicker information, the signal of input is carried out successively the original phase processing of demodulating data source code, regeneration modulated signals, reproduction signal, the original phase information of picked up signal, then, the original phase information of described signal and the signal phase information of described input are compared, reject the composition of modulated signals, obtain the signal phase flicker information, and described signal phase flicker information is transported to described computing machine.
(7) flicker CALCULATION OF PARAMETERS, computing machine carries out the calculating of amplitude scintillation intensity and phase place standard deviation respectively according to signal amplitude flicker information and signal phase flicker information, and output or demonstration amplitude scintillation intensity and phase place standard deviation.
A kind of ionospheric scintillation monitoring method of present embodiment, utilize the professional telesignalisation of Fengyun II meteorological satellite to carry out the ionospheric scintillation monitoring two major advantages are arranged: first, compare with gps signal, owing to be the geostationary meteorological satellite (GMS) signal, the variation of its flicker only comprises time factor; The second, compare with satellite TV signal, because the bit rate of telesignalisation only is 2K, and in fact accurately as can be known, therefore can be by the original phase of reproduction telesignalisation, the composition of rejecting modulation signal obtains phase scintillation information.
As seen, utilize the professional telesignalisation of Fengyun II meteorological satellite to carry out the ionospheric scintillation monitoring and have the advantage of utilizing gps signal and satellite TV signal monitoring simultaneously, effect is near the level of monochromatic beacon source.And the ionospheric scintillation monitor can with the shared identical antenna of broadening cloud atlas receiver, high frequency and first intermediate-frequency channel of Fengyun II meteorological satellite, help reducing the monitoring cost.
Embodiment 3
A kind of ionospheric scintillation monitor of the present invention as shown in Figure 3, obtains ionospheric scintillation information by the monitor satellite signal, and the monitoring beacon of ionospheric scintillation monitor is the continuous signal of geostationary meteorological satellite (GMS).This ionospheric scintillation monitor comprises and is provided with antenna 10, radio-frequency amplifier 20, first intermediate frequency amplifier 30, second intermediate frequency amplifier 40, wave detector 50, first A/D converter 60, phase detector 70, second A/D converter 80, digital signal processor 90 and computing machine 100.
First intermediate frequency amplifier 30 is provided with first output terminal 31 and second output terminal 32, and digital signal processor 90 is provided with signal amplitude information input end 901 and signal phase information input terminal 902.
Its principle of work is: antenna 10 receives the signal that geostationary meteorological satellite (GMS) is transmitted into ground, and the signal conveys tremendously high frequency amplifier 20 that antenna 10 receives reduces by the frequency of radio-frequency amplifier 20 with signal.Signal after radio-frequency amplifier 20 is handled is transported to first intermediate frequency amplifier 30 and is carried out the first intermediate frequency down-converted, and the signal after first intermediate frequency amplifier 30 is handled carries amplitude random fluctuation information.This signal one tunnel is transported to wave detector 50 after wave detector 50 detections, imports first A/D converter 60 and does to transport to digital signal processor 90 as signal amplitude information after mould/number conversion.Another road of signal after first intermediate frequency amplifier 30 is handled is transported to second intermediate frequency amplifier 40 and is carried out the second intermediate frequency down-converted, signal after the second intermediate frequency down-converted is transported to phase detector 70 behind the phase detector phase demodulation, imports second A/D converter 80 and does to transport to digital signal processor 90 as signal phase information after mould/number conversion.The signal amplitude information of 90 pairs of inputs of digital signal processor and signal phase information are handled picked up signal amplitude and phase scintillation information and signal amplitude and phase scintillation information are transported to computing machine 100.
Signal phase flicker information acquiring unit 92 comprises that the original phase unit 923 of demodulating data source code unit 921, regeneration modulated signals unit 922, reproduction signal becomes subdivision 924 with the rejecting modulated signals, rejects modulated signals and becomes subdivision to be provided with the first input end 9241 and second input end 9242.Demodulating data source code unit 921 input ends, rejecting modulated signals become the first input end 9241 of subdivision 924 to connect with second A/D converter, 80 output terminals, data source code element 921 output terminals connect with regeneration modulated signals unit 922 input ends, regeneration modulated signals unit 922 output terminals connect with original phase unit 923 input ends of reproduction signal, original phase unit 923 output terminals of reproduction signal become second input end 9242 of subdivision 924 to connect with the rejecting modulated signals, reject modulated signals and become subdivision 924 output terminals to connect with computing machine 100.The output signal of second A/D converter 80 reappears the original phase of signal after the original phase unit 923 of demodulating data source code unit 921, regeneration modulated signals unit 922, reproduction signal is handled.Reject modulated signals and become the first input end 9241 of subdivision 924 and the signal original phase information of second input end, 9242 difference input signal phase informations and reproduction, by rejecting after modulated signals becomes subdivision 924 to handle, can obtain ionospheric flicker phase information.
A kind of ionospheric scintillation monitor of the present invention, its structure is identical with embodiment 3, difference is, the monitoring beacon of the ionospheric scintillation monitor among this embodiment is chosen as the professional telesignalisation of Fengyun II meteorological satellite, the receive frequency of antenna 10 is 1705.2MH, and the frequency of operation of first intermediate frequency amplifier 30 is 152.5M.
Because professional telesignalisation is a continuous uninterrupted signal, this signal adopts the mode of secondary modulation when satellites transmits, the subcarrier of the 32KHz that the data of 2Kbps bit rate are modulated in the mode of DPSK, again subcarrier is modulated in the carrier wave that frequency is 1702.5MHz in the PM mode, its spectrum component simple and stable relatively is fit to carry out the ionospheric scintillation monitoring.
Because the frequency of the telesignalisation of Fengyun II meteorological satellite emission is 1702.5MHz, therefore, the receive frequency of antenna 10 also is set to 1702.5MHz in this correspondence.
First intermediate frequency amplifier 30 is chosen the frequency of 152.5M, be for make this ionospheric scintillation monitor can with the shared identical antenna of broadening cloud atlas receiver, high frequency and first intermediate-frequency channel of Fengyun II meteorological satellite.At present, the broadening cloud atlas receiving station of Fengyun II meteorological satellite spreads all over the country, its frequency is 1687.5M, the little 15M of frequency than telesignalisation, first intermediate frequency of present widely used broadening cloud atlas receiver is 137.5M, therefore, the frequency of first intermediate frequency amplifier 30 is selected in 152.5M, just can realizes the passage of the broadening cloud atlas receiver compatible front-end of ionospheric scintillation monitor and Fengyun II meteorological satellite.Help reducing the monitoring cost.
A kind of ionospheric scintillation monitor of present embodiment selects the professional telesignalisation of Fengyun II meteorological satellite as beacon.Have the following advantages, the first, compare with gps signal, owing to be the geostationary meteorological satellite (GMS) signal, the variation of its flicker only comprises time factor; The second, compare with satellite TV signal, because the bit rate of telesignalisation only is 2K, and in fact accurately as can be known, therefore can be by the original phase of reproduction telesignalisation, the composition of rejecting modulation signal obtains phase scintillation information.This ionospheric scintillation monitor utilizes the professional telesignalisation of Fengyun II meteorological satellite to carry out ionospheric scintillation monitoring to have the advantage of utilizing gps signal and satellite TV signal monitoring simultaneously, and effect is near the level of monochromatic beacon source.And the ionospheric scintillation monitor can with the shared identical antenna of broadening cloud atlas receiver, high frequency and first intermediate-frequency channel of Fengyun II meteorological satellite, help the popularization of this monitor and have utilize reducing the monitoring cost.
Should be noted that at last; above embodiment is only in order to illustrate technical scheme of the present invention but not limiting the scope of the invention; although the present invention has been done detailed description with reference to preferred embodiment; those of ordinary skill in the art is to be understood that; can make amendment or be equal to replacement technical scheme of the present invention, and not break away from the essence and the scope of technical solution of the present invention.
Claims (10)
1. ionospheric scintillation monitoring method is characterized in that: include following steps:
(1) beacon detects and determines, the ionospheric scintillation monitor detects the continuous signal of the geostationary meteorological satellite (GMS) emission of antenna reception, described continuous signal is defined as the beacon of ionospheric scintillation monitor monitoring;
(2) working signal receives, and described antenna receives the signal of described geostationary meteorological satellite (GMS) emission;
(3) high frequency down-converted, the signal that described antenna is received carries out the high frequency down-converted, to reduce the frequency of described signal;
(4) first intermediate frequency down-converted, the signal after the high frequency down-converted are transported to first intermediate frequency amplifier and are carried out the first intermediate frequency down-converted;
(5) signal amplitude and phase information collection are carried out signal amplitude information collection and phase information collection to the signal after the described first intermediate frequency down-converted, and described signal amplitude and position information are transported to digital signal processor processes, comprising:
(51) signal amplitude information collection after a road of the signal after the described first intermediate frequency down-converted is transported to the wave detector detection, after transporting to first A/D converter and doing mould/number conversion, is transported to digital signal processor as signal amplitude information, and
(52) signal phase information acquisition, another road of signal after the described first intermediate frequency down-converted is transported to second intermediate frequency amplifier and is carried out the second intermediate frequency down-converted, after the signal after the described second intermediate frequency down-converted is transported to the phase detector phase demodulation, transport to second A/D converter and do to transport to described digital signal processor as signal phase information after mould/number conversion;
(6) obtain signal amplitude and phase scintillation information, described digital signal processor is handled picked up signal amplitude and phase scintillation information to the described signal amplitude information and the described signal phase information of input, and transports to computing machine;
(7) flicker calculation of parameter, described computing machine carries out the calculating of amplitude scintillation intensity and phase place standard deviation respectively according to described signal amplitude flicker information and described signal phase flicker information, and output or show described amplitude scintillation intensity and phase place standard deviation.
2. ionospheric scintillation monitoring method according to claim 1 is characterized in that:
In the described step (1), the continuous signal that is specially described detection geostationary meteorological satellite (GMS) emission is a telesignalisation, and with the beacon of described telesignalisation as the monitoring of ionospheric scintillation monitor.
3. ionospheric scintillation monitoring method according to claim 1 is characterized in that: in the described step (6), describedly obtain signal amplitude and phase scintillation information specifically comprises:
(61) obtain the signal amplitude flicker information, described signal amplitude information is carried out the processing of amplitude flicker information obtain the signal amplitude flicker information, and transport to described computing machine; And
(62) obtain the signal phase flicker information, the signal of input is carried out successively the original phase processing of demodulating data source code, regeneration modulated signals, reproduction signal, the original phase information of picked up signal, then the original phase information of described signal and the signal phase information of described input are compared, reject the composition of modulated signals, obtain the signal phase flicker information and transport to described computing machine.
4. according to claim 1 or 2 or 3 described ionospheric scintillation monitoring methods, it is characterized in that: described beacon is the professional telesignalisation of geostationary meteorological satellite (GMS), and the receive frequency of described antenna is 1705.2MH.
5. ionospheric scintillation monitoring method according to claim 4 is characterized in that: the frequency of the described first intermediate frequency down-converted is 152.5M.
6. ionospheric scintillation monitoring method according to claim 4 is characterized in that: described digital processing unit is set to the scene can be all over journey gate array (FPGA) processor, and described numerical processor chip is the EP2C35F44C8 chip.
7. ionospheric scintillation monitor, it is characterized in that: comprise being provided with antenna, radio-frequency amplifier, first intermediate frequency amplifier, second intermediate frequency amplifier, wave detector, first A/D converter, phase detector, second A/D converter, digital signal processor and computing machine
Described first intermediate frequency amplifier is provided with first output terminal and second output terminal, and described digital signal processor is provided with signal amplitude information input end and signal phase information input terminal,
Described antenna receives the signal of geostationary meteorological satellite (GMS) emission, and described antenna is connected in described radio-frequency amplifier input end, and described radio-frequency amplifier output terminal connects with the described first intermediate frequency amplifier input end,
First output terminal of described first intermediate frequency amplifier connects with described wave detector input end, and described wave detector output terminal connects with the described first A/D converter input end,
The described first A/D converter output terminal connects with the signal amplitude information input end of described digital signal processor,
Second output terminal of described first intermediate frequency amplifier connects with the described second intermediate frequency amplifier input end, and the described second intermediate frequency amplifier output terminal connects with described phase detector input end,
Described phase detector output terminal connects with the described second A/D converter input end,
The described second A/D converter output terminal connects with the signal phase information input terminal of described digital signal processor,
Described digital signal processor output terminal connects with described computing machine.
8. ionospheric scintillation monitor according to claim 7 is characterized in that:
Described digital signal processor is provided with signal amplitude information processing unit and signal phase information process unit,
Described signal amplitude information processing unit is provided with amplitude flicker information processing unit, and described amplitude flicker information processing unit input end connects with the described first A/D converter output terminal, and described amplitude flicker information processing unit output terminal connects with described computing machine;
Described signal phase information process unit comprises that the original phase unit of demodulating data source code unit, regeneration modulated signals unit, reproduction signal becomes subdivision with the rejecting modulated signals, described rejecting modulated signals becomes subdivision to be provided with the first input end and second input end
Described demodulating data source code unit input end, described rejecting modulated signals become the first input end of subdivision to connect with the described second A/D converter output terminal, and described demodulating data source code unit output terminal connects with described regeneration modulated signals unit input end,
Described regeneration modulated signals unit output terminal connects with the original phase unit input end of described reproduction signal,
The original phase unit output terminal of described reproduction signal becomes second input end of subdivision to connect with described rejecting modulated signals,
Described rejecting modulated signals becomes the subdivision output terminal to connect with described computing machine.
9. according to claim 7 or 8 described ionospheric scintillation monitors, it is characterized in that: described digital signal processor is set to the scene can be all over journey gate array (FPGA) processor, and described processor chips are the EP2C35F44C8 chip.
10. according to claim 7 or 8 described ionospheric scintillation monitors, it is characterized in that: the monitoring beacon of described ionospheric scintillation monitor is the professional telesignalisation of geostationary meteorological satellite (GMS), described antenna is that receive frequency is the antenna of 1705.2MH, and described first intermediate frequency amplifier is the intermediate frequency amplifier of frequency of operation 152.5M.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176046A (en) * | 2011-01-28 | 2011-09-07 | 国家卫星气象中心 | Ionospheric scintillation monitor and monitoring method based on polar orbiting meteorological satellite signal |
| US9964645B2 (en) | 2014-02-28 | 2018-05-08 | Honeywell International Inc. | Satellite measurement screening to protect the integrity of existing monitors in the presence of phase scintillation |
| CN111830596A (en) * | 2020-07-30 | 2020-10-27 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Prediction method for single-station UHF frequency band ionosphere scintillation event occurrence duration within half an hour in future |
| CN113267792A (en) * | 2021-05-26 | 2021-08-17 | 中国电子科技集团公司第五十四研究所 | Ionized layer abnormity monitoring and early warning method based on monitoring station network |
| CN115113258A (en) * | 2022-06-25 | 2022-09-27 | 中国人民解放军国防科技大学 | Method for measuring ionospheric scintillation parameters of spaceborne SAR amplitude scintillation stripes |
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2010
- 2010-01-14 CN CN201010001165A patent/CN101806911A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102176046A (en) * | 2011-01-28 | 2011-09-07 | 国家卫星气象中心 | Ionospheric scintillation monitor and monitoring method based on polar orbiting meteorological satellite signal |
| US9964645B2 (en) | 2014-02-28 | 2018-05-08 | Honeywell International Inc. | Satellite measurement screening to protect the integrity of existing monitors in the presence of phase scintillation |
| CN111830596A (en) * | 2020-07-30 | 2020-10-27 | 中国电波传播研究所（中国电子科技集团公司第二十二研究所） | Prediction method for single-station UHF frequency band ionosphere scintillation event occurrence duration within half an hour in future |
| CN113267792A (en) * | 2021-05-26 | 2021-08-17 | 中国电子科技集团公司第五十四研究所 | Ionized layer abnormity monitoring and early warning method based on monitoring station network |
| CN115113258A (en) * | 2022-06-25 | 2022-09-27 | 中国人民解放军国防科技大学 | Method for measuring ionospheric scintillation parameters of spaceborne SAR amplitude scintillation stripes |
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Application publication date: 20100818 |