CN1847876A - Ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference method - Google Patents
Ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference method Download PDFInfo
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- CN1847876A CN1847876A CN 200510041997 CN200510041997A CN1847876A CN 1847876 A CN1847876 A CN 1847876A CN 200510041997 CN200510041997 CN 200510041997 CN 200510041997 A CN200510041997 A CN 200510041997A CN 1847876 A CN1847876 A CN 1847876A
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Abstract
The present invention relates to one lightning radiation source detecting and locating UHF system based on short base line time difference method. The system includes four rod shaped dipole antennas with input signal cables connected separately with four channels of high speed data acquisition system; one high speed data acquisition system with GPIB interface cable contained to the GPIB interface card in a microcomputer system; one fast antenna input signal cable connected to one fast antenna electric field instrument; one slow antenna input signal cable connected to one slow antenna electric field instrument; one instantaneous waveform recorder with signal input channels connected separately to the fast antenna electric field instrument, the slow antenna electric field instrument and the high speed data acquisition system. The present invention can find out the real-time position and variation of lightning radiation source for deep research of lightning mechanism.
Description
Technical field
The present invention relates to a kind of based on short base line time difference (TOA) ultrahigh frequency (VHF) lightning radiation source detecting and locating system, utilize a large amount of high frequencies that produce in the high-speed data acquisition device synchronization record lightning discharge process and very high frequency(VHF) electromagnetic pulse electric field waveform at four antennas, by microcomputer the hyperchannel lightning discharge process electric field data that record are handled then, calculate the orientation and the variation thereof of lightning radiation source in real time, can be comparatively intuitively and at length understand the physical process that development takes place lightning, deepen understanding to THE PHYSICS OF LIGHTNING mechanism.Native system can be widely used in fields such as the research of atmosphere thunderstorm electricity, meteorology, forestry, Aero-Space, power supply.
Background technology
The origin of modern lightning positioning system, the successful improvement that trace back to 1796 American's crith moral people such as (Krider.E.P) is done former twin cathode oscillograph lightning detection instrument.The intelligent magnetic direction lightning positioning system of developing on this basis adopts broadband to receive the VLF signal of lightning radiation, has overcome adverse effects such as polarization error that original narrow ripple signal brings, ionospheric reflection, makes angle error in 1 degree.Early 1980s has increased cloud ground again and has dodged the ripple authentication technique, and cloud ground lightning detection efficient is reached more than 90%.The mid-80 and latter stage, almost all developed countries and area all are furnished with the lightning monitoring network for location that this equipment is formed in the world.Meanwhile, at 20th century the mid-80, U.S. atmospheric science research company develops a kind of time difference method lightning location system again, and product formed in 1986, and arranged net in the eastern united states, in countries and regions networking such as Japan, Brazil, Australia.Enter the nineties in 20th century, on the basis of original direction-finding system, increased time difference function, be called the time-of-arrival direction finding commingled system; And on this basis, adopt the DSP technology to increase the digital waveform treatment technology, and be sent to central station with the form two-forty of network, carry out analysis, the localization process of waveform correlativity with workstation.Subsequently, people adopt long baseline TOA lightning radiation source positioning system again.Though long baseline TOA lightning radiation source positioning system has high orientation precision, owing to need the multistation simultaneous observation, certainly will increase many scopes such as GPS, when observing in some mountainous region, landform also can cause adverse influence.
After inferior, people adopt short baseline TOA again.Short baseline TOA and long baseline TOA relatively, short baseline aspect the location technology of thunder and lightning to landform require low, therefore-there is its special advantages in specific areas a bit.
In utilizing the The Location of short baseline TOA to lightning radiation source, Taylor has done a large amount of work.He in " geophysics research magazine ", introduced the space-time reflection that a kind of VHF technology is applied to the lightning discharge process (Taylor WL.A VHF technique for space-time mapping of lightningdischarge progresses[J] .J Geophys Res, 1978, the base length that is adopted 83:3575-3583) is 13.74m, the resolution of time difference measurements is 0.4ns, the bandwidth of recording unit is 20-80MHZ, and system adopts logical circuit and the direct time for reading difference of time code translator and positions.When radiation source is in the 0-30 degree elevation angle and 0-60 degree position angle, its positioning result will be presented on the oscillograph in real time, and be that the 16mm gamma camera of 50f/s is caught by maximal rate.Because the direct time for reading difference of employing hardware technology is high to the coherence request of each passage of equipment, and only is fit to the isolated pulse signal of processing rule, complicated electric field waveform is difficult to effective processing.For the influence of eliminating undesired signal with reduce error, needing increases many complex apparatus, and this just greatly reduces the practicality of system, and therefore after Taylor, the location technology of short baseline TOA thunder and lightning never has developed and uses.
The transmission speed of downloading along with frequency acquisition, memory capacity and the data of recording unit improves rapidly in recent years, and the increase greatly of digitized degree makes that the short baseline TOA of computer based radiation source location technology is more feasible.The reading of mistiming, result's demonstration and storage are all finished by computing machine, can also finish the processing of data by computer software.
Summary of the invention
The objective of the invention is to overcome the electric field measurement method lightning positioning system of existing lightning radiation source and the some shortcomings part of time difference method (TOA) lightning positioning system, a kind of ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference is provided, its electric field measurement with ultrahigh frequency lightning radiation source combines with time difference method (TOA) and realizes a kind of ultrahigh frequency lightning radiation source detecting and locating system of lacking baseline form, can in short baseline or ultra-short baseline scope, lay the electric field measurement antenna of lightning radiation source, with the accurate position of more accurately surveying and measuring the lightning generation that the form at single station realizes lightning radiation source, can determine the accurate track of lightning discharge simultaneously.
The object of the invention can take following technical scheme to realize:
A kind of ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference is to be made of shaft-like dipole antenna, digital four-way oscillograph, fast antenna electric field change instrument, slow antenna electric field change instrument, DL708 digital oscilloscope.The shaft-like dipole antenna input signal cable that 4 Gents are identical is connected with respective channel 1 to the passage 4 of high-speed data acquistion system respectively; The gpib interface signal cable line of high-speed data acquistion system links to each other with the gpib interface card in the microcomputer system; Fast antenna input signal cable is connected with fast antenna electric field change instrument; Slow antenna input signal cable is connected with slow antenna electric field change instrument, and fast antenna electric field change instrument output signal cable line is connected with signal input channel 1 end of transient waveform register; Slow antenna electric field change instrument output signal cable line is connected with signal input channel 2 ends of transient waveform register; The trigger pip cable of high-speed data acquistion system output is connected with signal input channel 3 ends of transient waveform register.
Every of shaft-like dipole antenna is long to be 2-2.5 rice, per two antennas are perpendicular to surface level, it connects between the vertical projection point on the surface level and constitutes a baseline, baseline is an equal length, and be between two baselines of two baselines that North and South direction is laid and east-west direction laying and intersect vertically, the projection on the vertical direction of the dipole antenna that four Gents are identical, isometric just in time is on four summits of a positive square on the surface level.
Shaft-like dipole antenna centre frequency is 280MHz, and bandwidth 100MHz, designing gain are 7-8dB.
The beneficial effect of technical characterstic of the present invention and generation is:
1, this based on short base line time difference (TOA) ultrahigh frequency lightning radiation source detecting and locating system of the present invention design is to adopt short baseline antenna arrangement that the electric field measurement of ultrahigh frequency lightning radiation source is combined with time difference method (TOA) and the mixed type lightning radiation source detecting and locating system a kind of simple in structure, easy for installation that constitutes.It has improved the electric field measurement method lightning positioning system of existing lightning radiation source and time difference method (TOA) lightning positioning system precision is not high, need some shortcomings parts such as multistation cooperates, website laying scope is big, site apparatus laying inconvenience.There is not the synchronous problem of multistation in the present invention, and equipment needed thereby is simple; Simultaneously, because the distance between the antenna is very near, each passage waveform is also consistent more, relatively easily, differentiation is from the time pulse of same radiation source, and being applicable to that the isolated pulse that time arrival method is located all has generation in each stage of lightning, this system that will make can describe the state of development of lightning relatively continuously.Because system possesses these unique advantages, will play a significant role in the research of THE PHYSICS OF LIGHTNING;
2, the present invention utilizes the electric field waveform that a large amount of high frequencies that produce in the high-speed data acquisition device synchronization record lightning discharge process and very high frequency(VHF) electromagnetic pulse are created in four antennas, by microcomputer the hyperchannel lightning discharge process electric field data that record are handled then, calculate the orientation and the variation thereof of lightning radiation source in real time, can be comparatively intuitively and at length understand the physical process that development takes place lightning, deepen understanding to THE PHYSICS OF LIGHTNING mechanism;
3, four dipole antenna length are respectively 2-25m, are installed in same surface level, and antenna a period of time is apart from ground 1.83m, the signal center frequency 280MHZ that receives apart from the 10m. system between the antenna, bandwidth 100MHZ.Four dipole antenna layouts are-the quadrature square-shaped planar, article four, baseline is isometric, because waveform character is obvious frequently for lightning electric field wave form height, the moment that is easy to lightning electric field waveform is arrived antenna is discerned, analyzes and calculates, thereby determines the position of lightning radiation source more exactly: the elevation angle and position angle.It has simplified the calculating lightning elevation angle and azimuthal computing method, and the express-analysis that helps data is calculated;
4, sample frequency of the present invention is 2GHZ, and memory capacity 500MByte. has adopted the segmentation triggering technique for solving the contradiction between sample frequency and the memory capacity, when the lightning pulses of radiation that surpass the regulation triggering level arrive, and section of trigger recording.By regulating triggering level, each discharge process of the lightning of varying strength and distance can both be recorded;
5, the present invention not only can measure the accurate position that lightning takes place, and the VHF electromagnetic field that can utilize the lightning radiation determines the accurate track of lightning discharge, it is for setting up the lightning monitoring net that covers the whole nation, quicken the application process of lightning location system, carry out commercialization lightning monitoring business and will produce positive role.
Description of drawings
Fig. 1 connects schematic flow sheet for each parts signal of the present invention
Fig. 2 is four shaft-like dipole antenna schematic layout patterns of the present invention
Fig. 3 is a time difference method radiation source positioning principle synoptic diagram of the present invention
Fig. 4 calculates synoptic diagram for lightning of the present invention orientation
Embodiment
Below in conjunction with accompanying drawing the present invention is further described again:
A kind of ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference is to be made of shaft-like dipole antenna, digital four-way oscillograph, fast antenna electric field change instrument, slow antenna electric field change instrument, DL708 digital oscilloscope.The shaft-like dipole antenna input signal cable that 4 Gents are identical is connected with respective channel 1 to the passage 4 of high-speed data acquistion system respectively; The gpib interface signal cable line of high-speed data acquistion system links to each other with the gpib interface card in the microcomputer system; Fast antenna input signal cable is connected with fast antenna electric field change instrument, slow antenna input signal cable is connected with slow antenna electric field change instrument, and fast antenna electric field change instrument output signal cable line is connected with signal input channel 1 end of transient waveform register; Slow antenna electric field change instrument output signal cable line is connected with signal input channel 2 ends of transient waveform register; The trigger pip cable of the high-speed data acquistion system output (see figure 1) that is connected with signal input channel 3 ends of transient waveform register.
As shown in Figure 2, A, B, the shaft-like dipole antenna length of C, D are 2 meters, per two antennas are perpendicular to surface level, it connects between the vertical projection point on the surface level and constitutes a baseline, baseline is an equal length, and be between two baselines of two baselines that North and South direction is laid and east-west direction laying and intersect vertically, constitute a square, A, B, the shaft-like dipole antenna of C, D lay respectively at foursquare four summits.Antenna AB and DC are at east-west direction, and BC and AD are in North and South direction.Base length is all 10 meters.Consider the shape of antenna self, this antenna arrangement helps reducing antenna pattern to influence of measurement error as far as possible.Test the influence of place in order to reduce to receiving antenna, the frame height of antenna should being tried one's best, when observing in the open air, antenna distance from bottom ground is greater than 1.5 meters.
Shaft-like dipole antenna centre frequency is 280MHz, and bandwidth 100MHz, designing gain are 7dB.
The high-speed data acquistion system parts that the present invention selects for use are the Lecroy374L type digital oscilloscope of U.S. Lecroy company.
The present invention also selects for use the GPIB 488-PCI interface card of America NI company as system high-speed data transmission interface parts.
The antenna of this short baseline time difference method ultrahigh frequency radiation source detecting and locating system that the present invention relates to is connected with oscillographic four input ends respectively by four length cables identical with Frequency Response; The Lecroy374L oscillograph is realized exchanges data by gpib interface card and microcomputer; The system controlled by computer oscillograph is finished the collection of lightning radiation signal, and the storage of collected data and the correlation parameter that arrive.The DL708 digital oscilloscope is used for the synchronous recording lightning and produces fast antenna electric field change and slow antenna electric field change, when being triggered with LeCcroy374L first segment record during work from triggering pulse signal that output port exports as the triggering source.And the triggering that can provide every section of LeCroy374L pairing position constantly.The lightning VHF radiated electric field waveform that oscillograph obtains can by the GPIB-PCI card from its memory read-write to computing machine.Connect with the dedicated data transmission line between oscillograph and the GPIB card, transmission speed is 1 megabyte/second, and the communication between microcomputer and the oscillograph also realizes by the GPIB card.
When having the same day lightning to take place in the air, the shaft-like dipole antenna that is connected the high-speed data acquistion system first passage is sensed the lightning electric field change rapidly, when lightning electric field signal amplitude of variation reaches the triggering level thresholding that system sets, trigger high-speed data acquistion system and begin four road lightning electric field waveform signals of input are carried out synchronous acquisition and record.Simultaneously, high-speed data acquistion system is exported a trigger waveform signal, to the transient waveform register system;
When the transient waveform register system received a trigger waveform signal of exporting from high-speed data acquistion system, it was true that its record triggers logic, thereby triggered the transient waveform register system.The transient waveform register system is gathered and record the electric field waveform signal of the slow antenna electric field wave form varies instrument output of the electric field waveform signal that is connected to the fast antenna electric field change instrument output of first passage above it and second channel with the sampling rate of 1MPt./S;
The every collection of high-speed data acquistion system once, continue about 1 second, finish behind the acquisition and recording by the GPIP interface on it, signal is finished in output one this collection, triggers the Wave data reception, demonstration, analytical calculation, the positioning result software for display that move on the computer system that connects on its GPIP interface.Software systems receive finish signal from this collection of high-speed data acquistion system after, whether the prompting user preserves the Wave data file on the computer system terminal screen immediately, the user can judge and select whether to preserve the lightning Wave data file that this collects according to the waveform quality situation of high speed acquisition system screen display.Preserve if select, then the computer system lightning Wave data that this can be collected is transferred in the computer system by gpib interface from high-speed data acquistion system automatically, and the data of each passage are saved as a data file by passage, data acquisition time parameter with high speed acquisition system also saves as an independent data file simultaneously, is used for later analytical calculation.Like this, every collection once can generate 4 data file and 1 data Parameter File during preservation.
Have bigger storage hard disk in the transient waveform register system, gather and write down the electric field waveform signal of fast, slow antenna electric field wave form varies instrument output, can write down approximately hundreds of data files, temporarily the data file that writes down need not be transferred in the computer system.Can derive a data file in one month in computer system, it is to be connected with PCMCA interface on the computing machine by the PCMCA interface card on it that its data derive, by operated transmission that file on the hard disk in the transient waveform register system and catalogue realize file data and preservation by the explorer in the computer system.
The Wave data reception that moves on the computer system, demonstration, analytical calculation, positioning result software for display, can carry out the waveform demonstration, analyze, calculate high-speed data acquistion system transmission and the lightning Wave data that is kept in the computer system hard, and can be with positioning result: the elevation angle of lightning radiation source and position angle, save as data file, also can graphically show.
The Wave data reception that moves on the computer system, demonstration, analytical calculation, positioning result software for display can be analyzed the electric field waveform signal data file of fast, the slow antenna electric field wave form varies instrument output of transient waveform register system record, calculating, waveform shows.The lightning electric field wave graphic data that can cooperate high-speed data acquistion system to collect, the process that development taken place lightning be analyzed and than accurate quantification be described.
Secondly, utilize ground, VLF/LF broadband to dodge localization method to cloud sudden strain of a muscle having carried out detection experiment, the result shows that this system also can position the cloud sudden strain of a muscle activity of far field thunderstorm.Because the cloud of thunderstorm dodges frequency and generally dodges (in some strong storm convection weather system such as hailstorm more than ground, cloud dodges discharge and has comparative advantage), and discharge is often getd out of the way the beginning from cloud first, and cloud dodges and monitoring is to the monitoring and warning of the relation understanding lightening activity and Thunderstorm Weather system development and develop and Small and Medium Sized diastrous weather all highly significant when dodging on ground.
For ease of the principle of description time difference method location technology, only consider to have the situation of two receiving antennas.As shown in Figure 3, suppose that A and B are two receiving antennas, d is a base length, and incident electromagnetic wave is along becoming these two antennas of the parallel arrival of direction of θ angle with baseline, and the pass of mistiming Δ t and incident angle (θ) is:
Δt＝dcos(θ)/c， (1)
Wherein c is the light velocity in the vacuum.From formula (1) as can be seen, only need record the mistiming that electromagnetic wave arrives two antennas, just can calculate the angle (θ) of lightning radiation source and baseline.
Fig. 4 calculates synoptic diagram for the lightning orientation, and wherein A, B, C, D represent four antennas respectively, and P is any one radiation source of space, and P ' is P projection on the ground, and φ, θ are the position angle and the elevation angle of radiation source.For convenience of calculation, the whole hemispherical sky is equally divided into four zones according to the position angle, respectively a quadrant of corresponding flat rectangular coordinate system.Use different combination of antennas when calculating the lightning radiation source of zones of different respectively, use its mean value during difference in computing time for the baseline of equivalence.When position angle during in (0 °-90 °) scope, be reference antenna with antenna DA, the position angle is a reference antenna with AB when (90 °-180 °), and the like.Under the situation of known time difference, the calculating at the radiation source position angle and the elevation angle mainly contains dual mode: the one, and hyperbolic method, the 2nd, tan method (orthogonal basis collimation method).The former mainly uses in long baseline time difference method positioning system, and the latter relatively is suitable for use in the radiation source positioning system of short baseline.The based on short base line time difference lightning radiation source positioning system that native system is introduced, what aerial array adopted is the quadrature baseline, therefore selects for use the latter to calculate the position angle and the elevation angle of radiation source.When the position angle of radiation source is in (0 °-90 °) scope, have:
cosθ×cos＝cosPDA (2)
cosθ×sin＝cosPDC (3)
θ is the elevation angle of radiation source in the formula, the φ position angle.Can get from (2), (3) two formulas:
＝arctg(Δt
dc/Δt
da)
θ＝arccos((c/d×Δt
da)
2+(c/d×Δt
dc)
2)
1/2
In the field inspection experiment that carry out in Qinghai, what oscillograph adopted is the recording mode that segmentation triggers, and can write down 1000 sections at most, and every section length writing time is 1 μ s.Oscillographic sample frequency is 2GS/s, and promptly the time interval between the sampled point is 0.5ns.When calculating the lightning radiation source orientation, only the sampled point difference that need draw between the characteristic pulse just can know that electromagnetic wave arrives the mistiming of each antenna.
Radiation source other in when zone computing method similar with (2), (3) formula, at first judge the scope at its place before the computer azimuth angle, according to in-scope result of calculation is done the position angle that different angle modification just can obtain reality then.
In order to reduce positioning error, in actual lightning orientation calculation procedure, for with the radiation source of certain baseline angle less than 25 °, use the baseline that is in the aerial array on the diagonal line to calculate the orientation of radiation source, can avoid radiation source like this near the extended line of baseline as far as possible.For example,, use the baseline that is in the aerial array on the diagonal line, calculate the orientation of radiation source, adopt baseline DB to replace DC to position when the angle of radiation source and baseline DC during less than 25 ° (dash area 1 among Fig. 2 .6); When radiation source and baseline DA angle during less than 25 ° (dash area 2 among Fig. 4), adopt baseline CA to replace DA to calculate.In addition, the measures such as place of also having taked to ignore the lower data of waveform similarity degree that each antenna writes down and choose broad view as far as possible when the time for reading difference improve bearing accuracy.
The result of calculation at the lightning position angle and the elevation angle is got off as one group of data storage respectively.Positioning result is taked the elevation angle-azimuthal display mode usually.But, also the position angle and the elevation angle are provided respectively over time sometimes for the ease of the analyzing and positioning result.In addition, also can provide the plane projection of radiation source positioning result, ignore radiation source to the difference of survey station distance and on the celestial body hemisphere face of its unit's of projecting to radius, projecting to then on the ground with the aerial array is in the circle of unit radius in the center of circle.But adopt this display mode that significant disadvantages is arranged, promptly the smaller radiation source in the elevation angle is compressed to one very in the circlet shape zone, the therefore bigger situation in the only suitable radiation source elevation angle, and native system is avoided using as far as possible.
Claims (3)
1, a kind of ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference, be to constitute, it is characterized in that the identical shaft-like dipole antenna input signal cable of 4 Gents is connected with respective channel 1 to the passage 4 of high-speed data acquistion system respectively by shaft-like dipole antenna, digital four-way oscillograph, fast antenna electric field change instrument, slow antenna electric field change instrument, DL708 digital oscilloscope; The gpib interface signal cable line of high-speed data acquistion system links to each other with the gpib interface card in the microcomputer system; Fast antenna input signal cable is connected with fast antenna electric field change instrument; Slow antenna input signal cable is connected with slow antenna electric field change instrument, and fast antenna electric field change instrument output signal cable line is connected with signal input channel 1 end of transient waveform register; Slow antenna electric field change instrument output signal cable line is connected with signal input channel 2 ends of transient waveform register; The trigger pip cable of high-speed data acquistion system output is connected with signal input channel 3 ends of transient waveform register.
2, a kind of ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference according to claim 1, it is characterized in that shaft-like dipole antenna length is 2-2.5 rice, per two antennas are perpendicular to surface level, it connects between the vertical projection point on the surface level and constitutes a baseline, baseline is an equal length, and be between two baselines of two baselines that North and South direction is laid and east-west direction laying and intersect vertically, the projection on the vertical direction of the dipole antenna that four Gents are identical, isometric just in time is on four summits of a positive square on the surface level.
3, a kind of ultrahigh frequency lightning radiation source detecting and locating system based on short base line time difference according to claim 1 and 2 is characterized in that shaft-like dipole antenna centre frequency is 280MHz, and bandwidth 100MHz, designing gain are 7-8dB.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102175929A (en) * | 2011-01-28 | 2011-09-07 | 中国气象科学研究院 | System for integrally, synchronously and comprehensively observing lightning electromagnetic signals |
| CN101609144B (en) * | 2009-07-29 | 2011-12-21 | 中国气象科学研究院 | Three-dimensional positioning system of lightning radiation source |
| CN102540145A (en) * | 2012-01-12 | 2012-07-04 | 中国人民解放军理工大学 | Single-station quasi-three-dimensional lightning positioning device and method |
| CN103698743A (en) * | 2013-12-13 | 2014-04-02 | 国家无线电监测中心 | Ionospheric-reflection-based time difference of arrival positioning method for shortwave radiation source |
| CN103809156A (en) * | 2014-02-25 | 2014-05-21 | 中国人民解放军理工大学 | Regional high-resolution lightening radiation source locating system |
| CN106405253A (en) * | 2016-08-24 | 2017-02-15 | 中国气象科学研究院 | Method and apparatus for positioning object lightning radiation source |
| CN107037271A (en) * | 2017-05-24 | 2017-08-11 | 国网辽宁省电力有限公司电力科学研究院 | A kind of wave electromagnetic radiation source investigation system based on cross-correlated signal Subspace algorithm |
| CN108490393A (en) * | 2018-03-20 | 2018-09-04 | 中国科学院大气物理研究所 | A kind of positioning of marine mobile platform and air navigation aid based on lightning location net |
| CN110174557A (en) * | 2019-01-11 | 2019-08-27 | 南京信息工程大学 | A kind of thunder cloud positioning calibration method based on three-dimensional atmospheric electric field instrument observation visual angle |
| CN110261820A (en) * | 2019-07-18 | 2019-09-20 | 中电科仪器仪表有限公司 | A kind of time difference positioning method and device of more measuring stations |
| CN116893395A (en) * | 2023-07-06 | 2023-10-17 | 武汉大学 | Active and passive lightning detection phase difference acquisition and correction system and method |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101609144B (en) * | 2009-07-29 | 2011-12-21 | 中国气象科学研究院 | Three-dimensional positioning system of lightning radiation source |
| CN102175929A (en) * | 2011-01-28 | 2011-09-07 | 中国气象科学研究院 | System for integrally, synchronously and comprehensively observing lightning electromagnetic signals |
| CN102540145A (en) * | 2012-01-12 | 2012-07-04 | 中国人民解放军理工大学 | Single-station quasi-three-dimensional lightning positioning device and method |
| CN102540145B (en) * | 2012-01-12 | 2013-06-05 | 中国人民解放军理工大学 | Single-station quasi-three-dimensional lightning positioning device and method |
| CN103698743A (en) * | 2013-12-13 | 2014-04-02 | 国家无线电监测中心 | Ionospheric-reflection-based time difference of arrival positioning method for shortwave radiation source |
| CN103698743B (en) * | 2013-12-13 | 2016-04-20 | 国家无线电监测中心 | Based on the shortwave radiation source time difference positioning method of ionospheric reflection |
| CN103809156A (en) * | 2014-02-25 | 2014-05-21 | 中国人民解放军理工大学 | Regional high-resolution lightening radiation source locating system |
| CN106405253A (en) * | 2016-08-24 | 2017-02-15 | 中国气象科学研究院 | Method and apparatus for positioning object lightning radiation source |
| CN107037271A (en) * | 2017-05-24 | 2017-08-11 | 国网辽宁省电力有限公司电力科学研究院 | A kind of wave electromagnetic radiation source investigation system based on cross-correlated signal Subspace algorithm |
| CN108490393A (en) * | 2018-03-20 | 2018-09-04 | 中国科学院大气物理研究所 | A kind of positioning of marine mobile platform and air navigation aid based on lightning location net |
| CN110174557A (en) * | 2019-01-11 | 2019-08-27 | 南京信息工程大学 | A kind of thunder cloud positioning calibration method based on three-dimensional atmospheric electric field instrument observation visual angle |
| CN110174557B (en) * | 2019-01-11 | 2021-12-21 | 南京信息工程大学 | Thunderstorm cloud positioning and calibrating method based on three-dimensional atmospheric electric field instrument observation visual angle |
| CN110261820A (en) * | 2019-07-18 | 2019-09-20 | 中电科仪器仪表有限公司 | A kind of time difference positioning method and device of more measuring stations |
| CN110261820B (en) * | 2019-07-18 | 2021-12-14 | 中电科思仪科技股份有限公司 | Time difference positioning method and device for multiple measuring stations |
| CN116893395A (en) * | 2023-07-06 | 2023-10-17 | 武汉大学 | Active and passive lightning detection phase difference acquisition and correction system and method |
| CN116893395B (en) * | 2023-07-06 | 2024-03-15 | 武汉大学 | Active and passive lightning detection phase difference acquisition and correction system and method |
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