CN105277926B - A kind of marine verification method of remote high-frequency ground wave radar - Google Patents
A kind of marine verification method of remote high-frequency ground wave radar Download PDFInfo
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01S—RADIO DIRECTION-FINDING; RADIO NAVIGATION; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION OR RERADIATION OF RADIO WAVES; ANALOGOUS ARRANGEMENTS USING OTHER WAVES
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Abstract
The invention discloses a kind of marine verification method of remote high-frequency ground wave radar, comprise the following steps：（1）Radar member is carried out to high-frequency ground wave radar to set,（2）According to the actual samples situation of each radar member sampled point of >=30 days Continuous Observations, the sample rate of each radar member is counted,（3）No less than 3 point positions should be set up at the maximum observation scope of ground wave radar；（4）Current meter is put into the fixed depth of water stabilization transmission signal progress ocean current DATA REASONING upwards；（5）Wave instrument floats over sea measurement sea wave data；（6）Anemobiagraph observes wind speed windward.The marine verification method of remote high-frequency ground wave radar disclosed in this invention, the erect-position selection in high-frequency ground wave radar comparison, had both met the checking requirement of high-frequency ground wave radar detection accuracy, and unnecessary manpower and materials are reduced again and are wasted.
Description
Technical field
The present invention relates to a kind of remote high-frequency ground wave radar sea in ground wave radar systems technology field, the particularly field
Upper verification method.
Background technology
When radio wave is towards emission of sea surface, can there are electromagnetic wave propagation model, referred to as earthwave in seawater surface.Earthwave is one
Surface wave is planted, therefore high-frequency ground wave radar is also referred to as high frequency surface wave radar.The earthwave of medium wave band and short-wave band is in seawater surface
Decay very little during propagation, and earthwave can be propagated along the earth surface of bending to a certain extent, be reached below horizon very
Remote place, that is, realize over-the-horizon propagation, therefore the high-frequency ground wave radar detected using earthwave over-the-horizon propagation characteristic
Referred to as ground wave OTHR, detection range can be usually reached 200~500km according to the difference of transmission power and frequency.
High-frequency ground wave radar the characteristics of the decay of conductive ocean surface diffraction propagation is small, is used using shortwave (3~30MHz)
Vertical polarized antenna radiates electric wave, and naval vessel, aircraft, iceberg and the guided missile that energy over-the-horizon detection sea level sight is appeared below etc. is transported
Moving-target, operating distance is up to more than 300km.Meanwhile, high-frequency ground wave radar utilizes single order of the ocean surface to frequency electromagnetic waves
Scattering and second order dispersion mechanism, can extract the sea situation information such as wind field, Lang Chang, flow field from radar return, realize to ocean ring
A wide range of, the high-precision and round-the-clock real-time monitoring in border.
In Military Application field, high-frequency ground wave radar is due to its operation wavelength and radio wave propagation characteristic, therefore compared to micro-
Ripple radar has following advantage：
(1) operating distance is remote (300~400km)；
(2) extremely strong anti-stealth capability；
(3) anti-low-level penetration；
(4) Anti-antiradiation missile
In marine environmental monitoring field, ground wave OTHR has the advantage that：
(1) coverage is big；
(2) round-the-clock real-time observation；
(3) function is more, cost performance is high.
Therefore high-frequency ground wave radar weather forecast, prevent and reduce natural disasters, shipping, fishery, pollution monitoring, development of resources, sea
Have wide practical use in terms of rescue, ocean engineering, scientific research of seas.
But research of the China to high-frequency ground wave radar is started late, Harbin Institute of Technology is in 1980s mid-term
Begin one's study for the high-frequency ground wave radar for detecting movement overseas target, built a station in Weihai in Shandong province.Wuhan University was in 1988
Begin one's study extra large state radar, a broad beam high-frequency ground wave radar OSMAR was succeeded in developing in 1993, for ocean surface state
The detection of parameter.The interim experiment centres of OSMAR2000 are established in the Zhoushan and Xiangshan in Zhejiang within 1999 and 2000 respectively.But ground
The observation element error of ripple radar inverting is not still verified.The Eleventh Five-Year Plan period ground wave radar system will enter business
Run, therefore the accuracy of its effective observation scope and data receives much attention.
The content of the invention
The technical problems to be solved by the invention, are just to provide a kind of marine verification method of remote high-frequency ground wave radar.
The present invention is adopted the following technical scheme that：
A kind of marine verification method of remote high-frequency ground wave radar, it is theed improvement is that, is comprised the following steps：
(1) radar member is carried out to high-frequency ground wave radar to set,
(2) according to the actual samples situation of each radar member sampled point of >=30 days Continuous Observations, each radar is counted
MemberTheoretical hits=sample frequency × time, wherein radar member sample rate
Overlay area more than 50% is confirmed as effective observation scope of radar system；
(3) it is determined that after effective observation scope of high-frequency ground wave radar, should be set at the maximum observation scope of ground wave radar
Vertical no less than 3 points position, it is desirable to which the distance interval of each point position is roughly equal, in sample rate highest region, should at least set up
One observation station, it is desirable to make observation station and radar as far as possible point-blank；
(4) current meter is put into the fixed depth of water stabilization transmission signal progress ocean current DATA REASONING upwards；
(5) wave instrument floats over sea measurement sea wave data；
(6) anemobiagraph observes wind speed windward.
Further, in step (4), set current meter observation period for every 10 minutes once, each sampling
Number is 60, and each sample frequency is 2 seconds, is carried out from continuous Current Observations are remembered, current meter lays the depth of water for 3-5 meters, transmitting
Frequency is 1 time/second, exports every 10 minutes average sampled datas.
Further, in step (5), one group of average sea wave data of wave instrument output in every 10 minutes, data storage are set
Mode is that sampling interval uses 0.25s from appearance.
Further, in step (6), anemobiagraph is set to observe 1 time for every 2 minutes, 1 minute every time, every group of Continuous Observation 5
It is secondary.
Further, in step (3), following principle need to be met when laying observation station：1. it should select to adopt under same case
The high point of sample rate is used as observation station；2. each observation station position should be on the same ray using radar as the center of circle；3. multistation is measured
In the case of, should try one's best the position laying website for choosing that radar radial direction angle is 90 °.
The beneficial effects of the present invention are：
The marine verification method of remote high-frequency ground wave radar disclosed in this invention, in high-frequency ground wave radar comparison
Erect-position is selected, and has both met the checking requirement of high-frequency ground wave radar detection accuracy, and unnecessary manpower and materials are reduced again and are wasted.
The marine verification method of remote high-frequency ground wave radar disclosed in this invention, is being surveyed with high-frequency ground wave radar measuring method
Measure depth and carry out similarization with the aspect of time of measuring two, further improve the degree of accuracy of the result.
Brief description of the drawings
Fig. 1 is the placement schematic diagram of current meter disclosed in the embodiment of the present invention 1 and wave instrument.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to embodiments, to the present invention
It is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not used to
Limit the present invention.
Embodiment 1, present embodiment discloses a kind of marine verification method of remote high-frequency ground wave radar, comprises the following steps：
(1) high-frequency ground wave radar uses the metering system of cover type, and its maximum coverage range is 200KM, the angle of measurement
Scope is 180 °.Because the coverage of high-frequency ground wave radar is wide, the sample rate of diverse location is different, is preferably to test
Demonstrate,prove the detection accuracy of high-frequency ground wave radar, it would be desirable to high-frequency ground wave radar investigative range sample rate is pre-processed, obtained
The satisfactory scope of sample rate, so as to reduce the unnecessary expenditure of measurement experiment.
Carry out radar member to high-frequency ground wave radar to set, choosing for resolution ratio need to be considered to the specific of checking detection accuracy
It is required that and the problems such as cost, select in the present embodiment with each lattice point 5KM distance at equal intervals and 1.5 ° of radial flow, 5 ° of wave
Angle at equal intervals cover sampling marine site, draw radar member number：
(2) high-frequency ground wave radar is tested, tests the running situation of radar, and carry out radar sampling detection, to protect
The stabilization and reliability of data are demonstrate,proved, radar need to continuously work more than 30 days.Continuously worked according to radar 30 days in the present embodiment
Afterwards, the actual samples situation for each radar member sampled point that Continuous Observation is arrived, counts the sample rate of each radar member：Theoretical hits=sample frequency × time.
For the reliability of guarantee test data, it would be desirable to a suitable sample rate is chosen as threshold value, if the threshold
The selection of value is excessively strict, will be unfavorable for fully judging effective observation scope with analysis earthwave radar observation, if sample rate
Threshold value chooses too high (＞ 50%), and effective observation scope area of high-frequency ground wave radar will be greatly reduced, and be unfavorable for high frequency
Ground wave radar is verified；If sample rate threshold value chooses too low (＜ 50%), in fact it could happen that be unsatisfactory for what quasi- harmonic analysis needed
Situation.
Selection 50% in the present embodiment is as threshold value, when we can be more than the observation of 2 observation cycles by choosing
Between ensure to still meet the situation that quasi- harmonic analysis needs under the worst observed case that a cycle does not have data, adopt
The selection of sample rate threshold value can be determined according to actual observation situation, if effectively observation area does not have when sample rate is higher than 50%
It is greatly reduced, then should selects higher sample rate as threshold value.
(3) particular location of observation station is chosen and should be taken into account the following aspects：The maximum probe model of high-frequency ground wave radar
Enclose；The space exploration scope of high-frequency ground wave radar；In the case of non-single station, different radar normals intersect Sea Near radar detection
Precision.
It is determined that after effective observation scope of high-frequency ground wave radar, if should be set up at the maximum observation scope of ground wave radar
Position is done, the high position of sample rate is chosen as far as possible as observation station, and the distance interval of each point position is roughly equal, permits in funds
Perhaps in the case of, the selection of point position is more more more is conducive to verification experimental verification.Point position is 3 at maximum magnitude in the present embodiment；Adopting
Set up an observation station in sample rate highest region.
Because the error of ocean current is the function of radar radial direction angle, inversion error and the station radial flow side of position two
The difference of parallactic angle is relevant, and radial flow is orthogonal at 90 ° of cut angle of azimuths, and the error of the ocean current of synthesis is minimum, is optimal in theory
Comparative observation position, can obtain the comparative observation error under most preferable situation, therefore in the case of non-single station, website is laid also
It should be noted that the change of the angle of cut of position；When laying website, should also try one's best makes website and radar point-blank, energy
The error change that enough checking high-frequency ground wave radar is produced under different observed ranges.
The sampling interval of high-frequency ground wave radar is 10min, and we give tacit consent to the average value that single observed result is 10 minutes, are
Effective checking high-frequency ground wave radar, the observing frequency of selected routine observation instrument is higher than or equal to the sight of high-frequency ground wave radar
Measured frequency, observation error should be less than the observation error of high-frequency ground wave radar, and the data provided are sampling period Continuous Observation
Average result.What is characterized by the observation of high-frequency ground wave radar is statistical average that ocean essential is observed in a certain depth layer
Value, and general measure obtain be a certain certain depth ocean essential observation, therefore conventional measuring equipment measurement when need choosing
Take suitable measurement position.
Set up successive station in the present embodiment separately and big face station carries out marine observation, wherein successive station refers to instrument being thrown to sea
In the erect-position that is measured for a long time ocean current and wave, big face station is set according to erect-position, the equipment carried by surveying vessel
Instrument carries out flow-type measurement, and ship comes to a complete stop in place to be observed, and finishes erect-position at once, two kinds of measurement erect-positions include wind speed,
The measurement of the characteristic elements such as wind direction, flow velocity, flow direction, wave height, wave direction and cycle.
(4) ocean current measurement：
Current meter is fixed on base by successive station selection, and base is based on permanent current so that ocean current is obtained with
Relatively stable ocean current data, put to the stabilization of seabed transmission signal progress ocean current DATA REASONING upwards, such as Fig. 1 institutes by instrument
Show, this observed pattern can obtain the ocean current profile data by seabed to top layer, relative to the method launched downwards by the water surface, sea
The upward transmission signal in flowmeter seat bottom carries out ocean current measurement, in the case of instrument is rift-free in itself, can be good at ensureing measurement
The accuracy of data, while can suitably weaken the situation for causing sea surface current not observe because blind area is excessive.Set during observation
The observation period of current meter is put for every 10 minutes once, each number of samples is 60, and each sample frequency is 2 seconds.
Big face station, which selects by ship side to put current meter to the fixed depth of water, carries out ocean current measurement, seen from the continuous ocean current of note
Survey, it is 3-5 meters that current meter, which lays the depth of water, tranmitting frequency is 1 time/second, exports every 10 minutes average sampled datas.
(5) wave measurement：
The anti-bottom socket cloth of wave instrument installation is placed near observation station and is observed by successive station selection, sets every 10 points of instrument
Clock exports one group of average sea wave data, and data storage method is that measurement accuracy is influenceed by depth residing for instrument, with depth from appearance
Increase measurement accuracy to decline.
When being measured at big face station, after wait ship casts anchor, wave buoy is floated off at hull to 1 times or so the distance of captain
It is observed, sampling interval uses 0.25s, every group of Continuous Observation 10 minutes.
(6) measuring wind speed：
After ship casts anchor, using anemobiagraph, highest point is observed windward before ship, observation in every 2 minutes 1 time, 1 minute every time,
Every group of Continuous Observation 5 times.
Disclosed in this invention verification method in October, 2000 Zhoushan areas's high-frequency ground wave radar contrast verification
Practical application is carried out in implementation process, and obtains preferable result of the test.Ocean wave measurement apparatus selection is boat-carrying in this time applying
The digital ripple Wen Yi of SZF1-II types, radar system is made up of two radars altogether in experiment, sharp (122 ° positioned at Zhu family respectively
24 ' 46 " E, 29 ° 53 ' 24 " N) and Xiangshan (121 ° 57 ' 43 " E, 29 ° 25 ' 58 " N), two places at a distance of about 60KM,
The wave of the sea spatial distribution rate about 3km of radar, data acquisition time is about 13 minutes.Following table be high-frequency ground wave radar with
SZF1-II measures significant wave height and the comparative analysis result of effective period.
| Key element | Significant wave height HS(m) | Effective period TS(s) |
| Mean absolute error | 0.18 | -0.22 |
| Average relative error | 11.5 | -0.92 |
| Ratio | 1.12 | 0.99 |
| Standard deviation | 0.31 | 1.42 |
As a result show, significant wave height absolute error average value is 0.18m, error is smaller, average of relatives value is 1.12, is approached
1.0；Effective period takes it as a whole, and the average value of absolute error is -0.22s, and relative error is 0.92%, meets survey well
The requirement of error is measured, average of relatives value is 0.99, close to 1.0, it can be seen that the radar detection value of significant wave height and effective period
Degree of agreement is higher between conventional instrument measured value.The specific embodiment can show that contrast verification method has in this patent
Feasibility.
Claims (1)
1. the marine verification method of a kind of remote high-frequency ground wave radar, it is characterised in that comprise the following steps：
(1) radar member is carried out to high-frequency ground wave radar to set,
(2) according to the actual samples situation of each radar member sampled point of >=30 days Continuous Observations, each radar member is counted
Sample rate,Theoretical hits=sample frequency × time, wherein radar member sample rate is 50%
Overlay area above is confirmed as effective observation scope of radar system, remote high-frequency ground wave radar sample rate threshold value
Choose, if sample rate threshold value chooses ＞ 50%, effective observation scope area of high-frequency ground wave radar will be greatly reduced, unfavorable
Verified in high-frequency ground wave radar；If sample rate threshold value chooses ＜ 50%, in fact it could happen that be unsatisfactory for quasi- harmonic analysis needs
Situation；
(3) it is determined that after effective observation scope of high-frequency ground wave radar, should be set up not at the maximum observation scope of ground wave radar
Less than 3 point positions, it is desirable to which the distance interval of each point position is roughly equal, in sample rate highest region, should at least set up one
Observation station, it is desirable to make observation station point-blank, following principle need to be met when laying observation station with radar as far as possible：1. mutually sympathize with
The high point of sample rate should be selected under condition as observation station；2. each observation station position should be in the same ray using radar as the center of circle
On；3. in the case of multistation measurement, should try one's best the position laying website for choosing that radar radial direction angle is 90 °；
(4) current meter is put into the fixed depth of water stabilization transmission signal progress ocean current DATA REASONING upwards, the sight of current meter is set
The survey period, for every 10 minutes once each number of samples was 60, and each sample frequency is 2 seconds, carried out the continuous sea of note certainly
Stream observation, it is 3-5 meters that current meter, which lays the depth of water, and tranmitting frequency is 1 time/second, exports every 10 minutes average sampled datas；
(5) wave instrument floats over sea measurement sea wave data, sets one group of average sea wave data of wave instrument output in every 10 minutes, data
Storage mode is that sampling interval uses 0.25s from appearance；
(6) anemobiagraph observes wind speed windward, sets anemobiagraph to observe within every 2 minutes 1 time, 1 minute every time, every group of Continuous Observation 5 times.
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