CN102538768A - Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar - Google Patents

Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar Download PDF

Info

Publication number
CN102538768A
CN102538768A CN2012100055429A CN201210005542A CN102538768A CN 102538768 A CN102538768 A CN 102538768A CN 2012100055429 A CN2012100055429 A CN 2012100055429A CN 201210005542 A CN201210005542 A CN 201210005542A CN 102538768 A CN102538768 A CN 102538768A
Authority
CN
China
Prior art keywords
img
frequency
water depth
wave radar
orientation
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CN2012100055429A
Other languages
Chinese (zh)
Other versions
CN102538768B (en
Inventor
吴雄斌
刘斌
李伦
徐新安
沈志奔
陈骁峰
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Wuhan University WHU
Original Assignee
Wuhan University WHU
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Wuhan University WHU filed Critical Wuhan University WHU
Priority to CN 201210005542 priority Critical patent/CN102538768B/en
Publication of CN102538768A publication Critical patent/CN102538768A/en
Application granted granted Critical
Publication of CN102538768B publication Critical patent/CN102538768B/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Abstract

The invention discloses a method for measuring the water depth of a shallow sea based on a double-frequency high-frequency ground wave radar. According to the method, the water depth of the shallow sea is measured by using the double-frequency high-frequency ground wave radar. Under the condition of shallow water, the water depth influences a sea surface radial flow detection result, and the position of a Bragg peak approaches a zero frequency along with the reduction of the water depth. On the basis of the influence, a new monotone function about the water depth is constructed, and the water depth is calculated according to the measurement result of Doppler frequency shift of the sea surface radial flow of the same position by using two working frequencies of the double-frequency high-frequency ground wave radar. The technical scheme provides a new method for detecting the water depth, the double-frequency high-frequency ground wave radar can measure the water depth of the shallow sea during sea dynamic element detection; and the water depth of shallow water with a large area can be detected; and an operation amount is low, and the method is high in accuracy and robustness.

Description

A kind of shallow water depth measuring method based on the double frequency high-frequency ground wave radar
Technical field
The present invention relates to the radargrammetry field, especially a kind of double frequency high-frequency ground wave radar that utilizes carries out the method that shallow water depth is measured.
Background technology
Shallow water depth is measured has crucial meaning to the burying underground of shallow sea petroleum exploration and exploitation, pipeline under the ocean and communication cable, maritime traffic transportation and sea fishery, sea-farming, coastal waters economy and ocean rescue etc.Traditional oceanic sounding technology is to be platform with the ship, adopts sonar technique to carry out.Since the restriction of time and funds, and have the unapproachable area of ship, make traditional Bathymetric Technology receive certain restriction in wide offshore sea waters.People are seeking a kind of not only fast but also cheap shallow water depth measuring method always.
Development along with remote sensing technology; It is progressively full-fledged to utilize seawater visible spectral remote sensing reflectivity, the brightness of the high-spectrum remote-sensing width of cloth to carry out the satellite remote sensing technology of bathymetric survey; But this technology can only be carried out on limpid marine site and daytime at water colour, uses to receive very big restriction.In addition; Satellite-borne SAR also becomes one of important technical of satellite ocean remote sensing observation; It through with the approaching extra large surface micro dimensional resonance of operation wavelength measure the sea backscatter signal amplitude and time phase information; Produce the high-resolution remote sensing image that characterizes the sea backscatter intensity and carry out depth of water inverting, but the prerequisite of SAR shallow sea terrain remote sensing imaging is to have than the existence of tide race and the generation of surface micro yardstick ripple.
High-frequency ground wave radar is the new technology that grow up over nearly 40 years round-the-clock, large tracts of land are surveyed ocean surface dynamics key element and Ship Target.Its ultimate principle of surveying the ocean surface radial flow is according to the single order marine echo electromagnetic scattering theory that Barrick proposes the backscattering echo that receives to be carried out Estimation of Spatial Spectrum to extract current direction information.Yet at shallow sea area, deep water conditions can not be met, and can the result of detection of ocean surface radial flow be exerted an influence.
Summary of the invention
The present invention utilizes that the depth of water has proposed a kind of shallow water depth measuring method based on the double frequency high-frequency ground wave radar to the influence of ocean surface radial flow result of detection under the shallow water condition.
Technical scheme of the present invention is a kind of shallow water depth measuring method based on the double frequency high-frequency ground wave radar, may further comprise the steps:
Step 1; If the frequency of operation of double frequency high-frequency ground wave radar is <img file=" 2012100055429100002DEST_PATH_IMAGE001.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> and <img file=" 586847DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " />; Wherein <img file=" 933515DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " ><img file=" 408359DEST_PATH_IMAGE001.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " />; Confirm a monotonic quantity <img file=" 955685DEST_PATH_IMAGE004.GIF " he=" 22 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 36 " /> according to frequency of operation <img file=" 256533DEST_PATH_IMAGE001.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> and <img file=" 438116DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " />, as shown in the formula one about the depth of water <img file=" 2012100055429100002DEST_PATH_IMAGE003.GIF " he=" 20 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 14 " />
Figure 2012100055429100002DEST_PATH_IMAGE005
Wherein,
Figure 917824DEST_PATH_IMAGE006
is acceleration of gravity, and is the light velocity;
Step 2; Two frequency of operation of double frequency high-frequency ground wave radar
Figure 546252DEST_PATH_IMAGE001
and
Figure 582341DEST_PATH_IMAGE002
measure the Doppler shift of same position ocean surface radial flow respectively; Utilize the value of result of detection calculating monotonic quantity
Figure 270811DEST_PATH_IMAGE004
, as shown in the formula two
Figure 94148DEST_PATH_IMAGE008
Wherein,
Figure 2012100055429100002DEST_PATH_IMAGE009
is the Doppler shift of the ocean surface radial flow of frequency
Figure 260688DEST_PATH_IMAGE001
detection,
Figure 479179DEST_PATH_IMAGE010
be the Doppler shift of the ocean surface radial flow of frequency
Figure 338551DEST_PATH_IMAGE002
detection;
Step 3; According to value and the formula one of step 2 gained monotonic quantity
Figure 947387DEST_PATH_IMAGE004
, obtain the depth of water
Figure 183196DEST_PATH_IMAGE003
.
Advantage of the present invention is: proposed a kind of method of new detection shallow water depth, made the double frequency high-frequency ground wave radar in the measurement of carrying out just realizing when the ocean dynamics key element is surveyed shallow water depth; Can carry out the large-area shallow water depth of water and survey, operand is little, has precision and robustness preferably.
Description of drawings
Fig. 1 is the embodiment of the invention function synoptic diagram.
Embodiment
Specify technical scheme of the present invention below in conjunction with accompanying drawing and embodiment.
Key of the present invention is according to new monotonic quantity about the depth of water of frequency of operation structure, utilizes two frequencies that the result of detection of the ocean surface radial flow of same position is carried out the depth of water and calculates.
Under deep water conditions, the stack that real sea can be decomposed into sinusoidal wave train composition with the mode of similar Fourier conversion.For bank base high-frequency ground wave radar; Wavelength
Figure 256194DEST_PATH_IMAGE012
equals the half the wave of radar wave wavelength can produce the strongest back scattering to electric wave; The propagation phase velocity of this row wave is confirmed; The words that phase velocity is confirmed; It is exactly what confirm to the Doppler shift that electromagnetic wave produced, and its Doppler shift is called Bragg peak (single order peak), and its size does
（1）
Wherein
Figure 286467DEST_PATH_IMAGE006
is acceleration of gravity;
Figure 444916DEST_PATH_IMAGE007
is the light velocity, and is the radar frequency of operation.
Because the effect of all kinds of physics, chemical process; Always there is ocean current to exist on the sea; Ocean current is as the mass motion of seawater, adds one by small frequency deviation that flow velocity caused on the basis of the more greatly fixedly frequency displacement that can be said be caused by the wave propagation phase velocity in the above again, away from the velocity component of radar the Bragg peak squinted to the negative frequency direction; Velocity component near radar makes the Bragg peak to the skew of positive frequency direction, just can obtain the size of ocean current radial velocity through measuring this frequency deviation.The Doppler shift that is caused by flow velocity radially does
Figure 2012100055429100002DEST_PATH_IMAGE015
（2）
Wherein
Figure 84025DEST_PATH_IMAGE016
is flow velocity radially, away from radar for just.
The Doppler shift at Bragg peak does so
Figure 2012100055429100002DEST_PATH_IMAGE017
（3）
The amount that high-frequency ground wave radar is directly measured is
Figure 222882DEST_PATH_IMAGE018
, just can obtain radially flow velocity through (3) formula then.Radially the direction of flow velocity can be measured through super-resolution algorithms such as MUSIC, at first the covariance matrix of structure spectrum point
Figure 118343DEST_PATH_IMAGE018
Figure 2012100055429100002DEST_PATH_IMAGE019
（4）
Wherein For
Figure 2012100055429100002DEST_PATH_IMAGE021
Matrix (spectrum point
Figure 600326DEST_PATH_IMAGE018
The reception data), NBe the array antenna number, KBe the sampling frame number, HExpression is carried out conjugate transpose to matrix.Then covariance matrix
Figure 671050DEST_PATH_IMAGE022
is carried out feature decomposition and obtain noise subspace
Figure 2012100055429100002DEST_PATH_IMAGE023
; Realize measurement of bearing through the minimum optimization algorithm at last, its formula does
Figure 786773DEST_PATH_IMAGE024
（5）
Wherein
Figure 2012100055429100002DEST_PATH_IMAGE025
is steering vector, expression make the variate-value of objective function
Figure DEST_PATH_IMAGE027
when getting minimum value;
Figure 169530DEST_PATH_IMAGE028
minimum value for finding by bearing search, the corresponding angle of minimum value is radially flow velocity orientation.The formula that the MUSIC spectrum is estimated does
Figure 2012100055429100002DEST_PATH_IMAGE029
（6）
Wherein
Figure 524288DEST_PATH_IMAGE030
is the inverse of ;
Figure 475036DEST_PATH_IMAGE030
obtains maximal value when getting minimum value as
Figure 761158DEST_PATH_IMAGE027
, and the corresponding angle of this maximal value is radially flow velocity orientation.
The shallow water condition in present technique field refers generally to
Figure DEST_PATH_IMAGE031
; Wherein
Figure 582670DEST_PATH_IMAGE003
is the depth of water,
Figure 102513DEST_PATH_IMAGE032
be the corresponding wavelength of frequency of operation.
Under the shallow water condition; Because the effect in seawater and seabed can not be ignored; The Bragg peak is except outside the Pass having with frequency of operation
Figure 651306DEST_PATH_IMAGE014
; Also relevant with the depth of water
Figure 801664DEST_PATH_IMAGE003
, its size
Figure DEST_PATH_IMAGE033
does
Figure 131014DEST_PATH_IMAGE034
（7）
The Doppler shift at Bragg peak under the shallow water condition
Figure DEST_PATH_IMAGE035
does
（8）
When depth condition is unknown, just can not try to achieve radially flow velocity
Figure 857848DEST_PATH_IMAGE016
through (8) formula.
Suppose to have a bank base double frequency high-frequency ground wave radar to be erected at the seashore, its frequency of operation is respectively and
Figure 605541DEST_PATH_IMAGE002
and satisfies
Figure DEST_PATH_IMAGE037
.
When the depth of water of search coverage satisfies the shallow water condition of a frequency of operation at least with regard to the energy measurement depth of water, promptly
Figure 732766DEST_PATH_IMAGE038
（9）
Where
Figure 2012100055429100002DEST_PATH_IMAGE039
is the frequency
Figure 318468DEST_PATH_IMAGE001
corresponding wavelengths.
The depth of water of a certain bin in sea is ; Satisfy the bathymetric survey condition; Radially flow velocity is
Figure 786676DEST_PATH_IMAGE016
, by (8) Shi Kede
Figure 327378DEST_PATH_IMAGE040
（10）
Figure 2012100055429100002DEST_PATH_IMAGE041
（11）
Wherein,
Figure 767587DEST_PATH_IMAGE009
is the Doppler shift of the ocean surface radial flow of frequency
Figure 368333DEST_PATH_IMAGE001
detection,
Figure 893992DEST_PATH_IMAGE010
be the Doppler shift of the ocean surface radial flow of frequency
Figure 300702DEST_PATH_IMAGE002
detection.
Order
Figure 798680DEST_PATH_IMAGE042
（12）
By (10 ~ 12) Shi Kede
Figure 304747DEST_PATH_IMAGE005
（13）
Figure 19500DEST_PATH_IMAGE004
is the monotonic quantity about the depth of water.When
Figure 26639DEST_PATH_IMAGE001
=6MHz,
Figure 527195DEST_PATH_IMAGE002
=12MHz; The functional arrangement of
Figure 204164DEST_PATH_IMAGE004
is as shown in Figure 1; Wherein horizontal ordinate is the depth of water (unit is m), the value (unit be Hz) of ordinate for
Figure 704415DEST_PATH_IMAGE004
.
Embodiment comprises that step is following:
Step 1; If the frequency of operation of double frequency high-frequency ground wave radar is <img file=" 452928DEST_PATH_IMAGE001.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> and <img file=" 659919DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " />; Wherein <img file=" 835685DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " ><img file=" 885550DEST_PATH_IMAGE001.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " />; Confirm a monotonic quantity <img file=" 992866DEST_PATH_IMAGE004.GIF " he=" 22 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 36 " /> according to frequency of operation <img file=" 172174DEST_PATH_IMAGE001.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> and <img file=" 499251DEST_PATH_IMAGE002.GIF " he=" 25 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " /> about the depth of water <img file=" 845918DEST_PATH_IMAGE003.GIF " he=" 20 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 14 " />, suc as formula (13):
Figure 83182DEST_PATH_IMAGE005
Wherein,
Figure 264764DEST_PATH_IMAGE006
is acceleration of gravity, and
Figure 782333DEST_PATH_IMAGE007
is the light velocity.
Step 2; Two frequency of operation of double frequency high-frequency ground wave radar
Figure 682156DEST_PATH_IMAGE001
and measure the Doppler shift of same position ocean surface radial flow respectively; Utilize measurement result to calculate the value of monotonic quantity
Figure 346673DEST_PATH_IMAGE004
, computing formula is suc as formula (12):
Figure 35143DEST_PATH_IMAGE008
Wherein,
Figure 156683DEST_PATH_IMAGE009
is the Doppler shift of the ocean surface radial flow of frequency detection,
Figure 744976DEST_PATH_IMAGE010
be the Doppler shift of the ocean surface radial flow of frequency detection.
Step 3; According to value and the formula 13 of step 2 gained monotonic quantity , obtain the depth of water
Figure 121097DEST_PATH_IMAGE003
.
During practical implementation; At first adopt the double frequency high-frequency ground wave radar to measure; Two frequency of operation of double frequency high-frequency ground wave radar
Figure 505679DEST_PATH_IMAGE001
and
Figure 473635DEST_PATH_IMAGE002
measure the Doppler shift of the ocean surface radial flow of same position respectively; Measurement result is respectively
Figure 569767DEST_PATH_IMAGE009
and
Figure 343688DEST_PATH_IMAGE010
; Value with substitution as a result (12) formula is obtained
Figure 474455DEST_PATH_IMAGE004
can calculate the depth of water
Figure 675629DEST_PATH_IMAGE003
by (13) formula at last.The concrete calculating depth of water
Figure 993478DEST_PATH_IMAGE003
that realizes belongs to mathematical method of the prior art; Can ask the depth of water
Figure 556364DEST_PATH_IMAGE003
through the mode that monotonic quantity
Figure 508773DEST_PATH_IMAGE004
computing function relation table is tabled look-up then; Perhaps find the solution the depth of water
Figure 866122DEST_PATH_IMAGE003
through iterative algorithm, the present invention will not give unnecessary details.
Though the shallow water measuring method that the present invention describes realizes through the double frequency high-frequency ground wave radar, is suitable for too when the frequency of operation number of high-frequency ground wave radar surpasses 2.Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.

Claims (1)

1. the shallow water depth measuring method based on the double frequency high-frequency ground wave radar is characterized in that, may further comprise the steps:
Step 1; If the frequency of operation of double frequency high-frequency ground wave radar is <img file=" 2012100055429100001DEST_PATH_IMAGE001.GIF " he=" 25 " id=" ifm0001 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> and <img file=" 617711DEST_PATH_IMAGE002.GIF " he=" 25 " id=" ifm0002 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " />; Wherein <img file=" 952878DEST_PATH_IMAGE002.GIF " he=" 25 " id=" ifm0003 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " ><img file=" 744116DEST_PATH_IMAGE001.GIF " he=" 25 " id=" ifm0004 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " />; Confirm a monotonic quantity <img file=" 889293DEST_PATH_IMAGE004.GIF " he=" 22 " id=" ifm0008 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 36 " /> according to frequency of operation <img file=" 822931DEST_PATH_IMAGE001.GIF " he=" 25 " id=" ifm0005 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 17 " /> and <img file=" 383225DEST_PATH_IMAGE002.GIF " he=" 25 " id=" ifm0006 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 20 " />, as shown in the formula one about the depth of water <img file=" 2012100055429100001DEST_PATH_IMAGE003.GIF " he=" 20 " id=" ifm0007 " img-content=" drawing " img-format=" jpg " inline=" no " orientation=" portrait " wi=" 14 " />
Figure 2012100055429100001DEST_PATH_IMAGE005
Wherein,
Figure 167827DEST_PATH_IMAGE006
is acceleration of gravity, and
Figure 2012100055429100001DEST_PATH_IMAGE007
is the light velocity;
Step 2; Two frequency of operation of double frequency high-frequency ground wave radar
Figure 112649DEST_PATH_IMAGE001
and
Figure 527450DEST_PATH_IMAGE002
measure the Doppler shift of same position ocean surface radial flow respectively; Utilize the value of result of detection calculating monotonic quantity
Figure 469998DEST_PATH_IMAGE004
, as shown in the formula two
Figure 970250DEST_PATH_IMAGE008
Wherein,
Figure 2012100055429100001DEST_PATH_IMAGE009
is the Doppler shift of the ocean surface radial flow of frequency
Figure 390867DEST_PATH_IMAGE001
detection,
Figure 925754DEST_PATH_IMAGE010
be the Doppler shift of the ocean surface radial flow of frequency
Figure 773624DEST_PATH_IMAGE002
detection;
Step 3; According to value and the formula one of step 2 gained monotonic quantity , obtain the depth of water
Figure 985479DEST_PATH_IMAGE003
.
CN 201210005542 2012-01-10 2012-01-10 Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar Expired - Fee Related CN102538768B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN 201210005542 CN102538768B (en) 2012-01-10 2012-01-10 Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN 201210005542 CN102538768B (en) 2012-01-10 2012-01-10 Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar

Publications (2)

Publication Number Publication Date
CN102538768A true CN102538768A (en) 2012-07-04
CN102538768B CN102538768B (en) 2013-08-14

Family

ID=46346261

Family Applications (1)

Application Number Title Priority Date Filing Date
CN 201210005542 Expired - Fee Related CN102538768B (en) 2012-01-10 2012-01-10 Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar

Country Status (1)

Country Link
CN (1) CN102538768B (en)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103293521A (en) * 2013-06-26 2013-09-11 武汉大学 Method for detecting water depth of offshore sea by X-band radar
CN104613893A (en) * 2015-02-09 2015-05-13 国家海洋局第二海洋研究所 Method for using remote sensing images to measure sand wave water depth
CN105277926A (en) * 2015-10-12 2016-01-27 中国海洋大学 Remote high-frequency ground-wave radar offshore verification method
CN106291470A (en) * 2016-07-28 2017-01-04 中国船舶重工集团公司第七〇九研究所 A kind of based on the disturbance restraining method of feature during high-frequency ground wave radar ocean current result sky
CN108120981A (en) * 2017-12-27 2018-06-05 中科卫星应用德清研究院 Shallow water depth radar remote sensing detection method
CN111722218A (en) * 2020-06-03 2020-09-29 武汉大学 Double-frequency composite waveform high-frequency radar system
CN112799029A (en) * 2020-12-28 2021-05-14 南昌大学 High-frequency ocean radar first-order echo extraction method based on watershed segmentation
CN116500604A (en) * 2023-06-27 2023-07-28 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) Quantitative inversion method and device for water depth

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
吴雄斌,杨绍麟,程丰等: "高频地波雷达东海海洋表面矢量流探测试验", 《地球物理学报》 *
陈江，吴雄斌，程丰，高火涛: "高频地波雷达近海表面流探测初步研究", 《地波科学学报》 *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103293521B (en) * 2013-06-26 2015-03-25 武汉大学 Method for detecting water depth of offshore sea by X-band radar
CN103293521A (en) * 2013-06-26 2013-09-11 武汉大学 Method for detecting water depth of offshore sea by X-band radar
CN104613893A (en) * 2015-02-09 2015-05-13 国家海洋局第二海洋研究所 Method for using remote sensing images to measure sand wave water depth
CN104613893B (en) * 2015-02-09 2017-03-15 国家海洋局第二海洋研究所 A kind of method that utilization remote sensing images measure the bed ripples depth of water
CN105277926A (en) * 2015-10-12 2016-01-27 中国海洋大学 Remote high-frequency ground-wave radar offshore verification method
CN106291470B (en) * 2016-07-28 2018-08-24 中国船舶重工集团公司第七一九研究所 The disturbance restraining method of feature when a kind of ocean current result sky based on high-frequency ground wave radar
CN106291470A (en) * 2016-07-28 2017-01-04 中国船舶重工集团公司第七〇九研究所 A kind of based on the disturbance restraining method of feature during high-frequency ground wave radar ocean current result sky
CN108120981A (en) * 2017-12-27 2018-06-05 中科卫星应用德清研究院 Shallow water depth radar remote sensing detection method
CN108120981B (en) * 2017-12-27 2019-12-03 中科卫星应用德清研究院 Shallow water depth radar remote sensing detection method
CN111722218A (en) * 2020-06-03 2020-09-29 武汉大学 Double-frequency composite waveform high-frequency radar system
CN111722218B (en) * 2020-06-03 2023-04-07 武汉大学 Double-frequency composite waveform high-frequency radar system
CN112799029A (en) * 2020-12-28 2021-05-14 南昌大学 High-frequency ocean radar first-order echo extraction method based on watershed segmentation
CN112799029B (en) * 2020-12-28 2023-10-31 南昌大学 High-frequency marine radar first-order echo extraction method based on watershed segmentation
CN116500604A (en) * 2023-06-27 2023-07-28 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) Quantitative inversion method and device for water depth
CN116500604B (en) * 2023-06-27 2023-08-29 哈尔滨工业大学(深圳)(哈尔滨工业大学深圳科技创新研究院) Quantitative inversion method and device for water depth

Also Published As

Publication number Publication date
CN102538768B (en) 2013-08-14

Similar Documents

Publication Publication Date Title
CN102538768B (en) Method for measuring water depth of shallow sea based on double-frequency high-frequency ground wave radar
Lund et al. A new technique for the retrieval of near‐surface vertical current shear from marine X‐band radar images
CN101697011A (en) Simulation method of bistatic synthetic aperture radar sea wave direction spectrum
Xu et al. Multimodal structure of the internal tides on the continental shelf of the northwestern South China Sea
Pandian et al. An overview of recent technologies on wave and current measurement in coastal and marine applications
CN102176012B (en) Two-dimensional shallow sea bottom topography synthetic aperture radar image simulation method
Hackett et al. Comparison of incoherent and coherent wave field measurements using dual-polarized pulse-Doppler X-band radar
Trizna Coherent marine radar measurements of ocean surface currents and directional wave spectra
CN106959442B (en) Ground wave radar first-order sea echo composes extracting method under strong interference environment based on multiple domain information
Lund et al. Marine X‐Band Radar Currents and Bathymetry: An Argument for a Wave Number‐Dependent Retrieval Method
Liu et al. A new Doppler model incorporated with free and broken-short waves for coherent S-band wave radar at near-grazing angles
Huang et al. Ocean remote sensing using X-band shipborne nautical radar—Applications in eastern Canada
Zhang et al. Real-time localization for underwater equipment using an extremely low frequency electric field
Kovatch et al. Vorticity recirculation and asymmetric generation at a small headland with broadband currents
CN102663736A (en) Detection method of freak wave in across-track interference SAR images
CN112162282A (en) Synthetic aperture radar-based sea surface flow velocity inversion method
CN103616711A (en) Beidou buoy wave measurement method
Zhou et al. Portable high frequency surface wave radar OSMAR-S
CN110673128B (en) X-waveband shore-based radar flow measurement method based on intermittent up-down frequency modulation waves
Hasan et al. Observation of a stormy wave field with X-band radar and its linear aspects
Helzel et al. WERA: Remote ocean sensing for current, wave and wind direction
Wang et al. Numerical simulation and inversion of offshore area depth based on X-band microwave radar
Gopalakrishnan Surface current observations using high frequency radar and its assimilation into the New York harbor observing and prediction system
Huang et al. Enhancement of the normalized scalar product method for surface current measurement using nautical radar
Corredor et al. Optimizing and Validating High-Frequency Radar Surface Current Measurements in the Mona Passage

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20130814

Termination date: 20200110

CF01 Termination of patent right due to non-payment of annual fee