CN109031439A - A kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines method and system - Google Patents
A kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines method and system Download PDFInfo
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- CN109031439A CN109031439A CN201810812031.5A CN201810812031A CN109031439A CN 109031439 A CN109031439 A CN 109031439A CN 201810812031 A CN201810812031 A CN 201810812031A CN 109031439 A CN109031439 A CN 109031439A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01V—GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; DETECTING MASSES OR OBJECTS; TAGS
- G01V3/00—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation
- G01V3/40—Electric or magnetic prospecting or detecting; Measuring magnetic field characteristics of the earth, e.g. declination, deviation specially adapted for measuring magnetic field characteristics of the earth
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C21/00—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00
- G01C21/04—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by terrestrial means
- G01C21/08—Navigation; Navigational instruments not provided for in groups G01C1/00 - G01C19/00 by terrestrial means involving use of the magnetic field of the earth
Abstract
The present invention discloses a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance and determines method and system.The described method includes: obtaining the longitude and latitude of the known station and unknown point；According to the longitude and latitude of the longitude and latitude of the station and the unknown point, the difference of latitude and distance of the known station and the unknown point are calculated；According to the difference of latitude and the distance, weight is determined；The weight is substituted into Tonghua processing observational equation, determines diurnal variation numerical value.Using method or system of the invention, the calculated result of its diurnal variation numerical value and the correlation of unknown point actual measurement data are very high, substantially the basic physical attribute of practical day parameter evidence at unknown point is reflected, and Tonghua precision is influenced smaller by the distance between the known station and unknown point, precision is higher.
Description
Technical field
The present invention relates to magnetic survey fields, more particularly to a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance
Determine method and system.
Background technique
Earth magnetic field is the magnetic rock by earth interior and is distributed in earth interior and external electric current system is produced
The trivector physical field that raw various magnetic field components are formed by stacking is the function of spatial position and time.Due to origin of the Earth's magnetic field
Difference, the spatial distribution and Time Change of various magnetic field components also differ widely.It is divided according to location of source, earth's magnetic field can
To be divided into internal field and external field two large divisions.
Internal field originates from earth's surface magnetisable material below and electric current, including ground nuclear field and earth's crust field.Ground nuclear field is also known as led
Magnetic field is generated by earth's core Magnetohydrodynamic(MHD) generator process.Earth's crust field is called local anomaly field, is generated by ground nuclear magnetism rock
, main field and local anomalous field variation slowly, synthesize stabilizing magnetic field again sometimes, annual gradient is below 0.1%.Internal field
In should also include external change magnetic field earth interior induction field, from stabilizing magnetic field unlike, induction field variation comparatively fast.
External field is mainly distributed on ionosphere, magnetosphere and interplanetary space originating from space current system more than earth's surface.
Due to these electric current systems and its time change feature in magnetic field, variation magnetic field can be generally divided into tranquil variation magnetic field and disturbed
Moving field.The variation of external field is more complicated, there is sun diurnal variation, sun monthly variation, variation in 27 days, seasonal variations and irregular
Magnetic storm variation etc..
The earth magnetic field composition of ground station observation mainly contains main field, lithospheric magnetic field, variation magnetic field and induction
Magnetic field, with the spatial distribution characteristic either study of rocks circle magnetic field of ground station Geomagnetic observation data research earth's magnetic field main field
When change capture seismomagnetic exception, need to eliminate variation magnetic field and induced magnetic field composition.Geomagnetic field variation is by many factors shadow
It rings, in earth-magnetism navigation, geomagnetic matching and earthquake prediction field extensive application, so obtaining accurate earth's magnetic field diurnal variation
Just be particularly important, and global Station distribution be it is uneven and rare, utilize the day parameter of known station estimation tested point
According to that is, geomagnetic data Tonghua is handled.
In determining in power method for existing Geomagnetic Station measurement data Tonghua processing, the fixed power side of anti-distance is generally used
Method.The basic principle that anti-distance weighs method surely is to determine all known geomagnetic observatories in certain search radius centered on unknown point
The number stood, the distance for calculating each station to unknown point are calculated with the inverse of the inverse of the distance or square distance for weight
The value of unknown point and as its observation.
In this way the advantages of is that calculating speed is very fast, the correlation of calculated result and unknown point actual measurement data
It is higher, there is good effect in the processing of short distance Geomagnetic Station measurement data Tonghua.But exist in this way very
Big disadvantage: variation of the magnetic survey data on latitude direction is greater than longitudinal, therefore, only relies between Geomagnetic Station
Distance determine power, do not consider that the component difference on Geomagnetic Station measurement data latitude direction is determining the influence in power, with earth's magnetic field
Change in time and space characteristics match it is weaker, therefore remote Geomagnetic Station measurement data Tonghua processing in precision it is poor.
Summary of the invention
The object of the present invention is to provide a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance to determine method and system,
The basic physical attribute of the practical day parameter evidence of unknown point is reflected, and improves the processing of remote Geomagnetic Station measurement data Tonghua
In precision.
To achieve the above object, the present invention provides following schemes:
A kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines method, which comprises
Obtain the longitude and latitude of the known station and unknown point；
According to the longitude and latitude of the longitude and latitude of the station and the unknown point, the known station and the unknown point are calculated
Difference of latitude and distance；
According to the difference of latitude and the distance, weight is determined；
The weight is substituted into Tonghua processing observational equation, determines diurnal variation numerical value.
Optionally, described according to the longitude and latitude of the station and the longitude and latitude of the unknown point, calculate the known station
With the difference of latitude and distance of the unknown point, specifically include:
If longitude and latitude (the x of the stationA、yA), the longitude and latitude of the unknown point is (xB、yB), pass through formula x=xB-xA
Calculate the difference of latitude of the known station and the unknown point；
Pass through formulaCalculate the distance of the known station and the unknown point
dAB。
Optionally, the known station is the station of the unknown point in setting search radius, and quantity is n.
Optionally, described that weight is determined according to the difference of latitude and the distance, it specifically includes:
By the difference of latitude Δ LatiWith the distanceSubstitute into formulaDetermine weight pi；
Wherein, Δ LatiFor the difference of latitude of tested point and i-th of station, Δ Lati> 2, u indicate each website to unknown point
The index of distance is any positive real number,For the distance of i-th of website to unknown point.
Optionally, described that the weight is substituted into Tonghua processing observational equation, it determines diurnal variation numerical value, specifically includes:
By the weight piIt substitutes into Tonghua and handles observational equationDetermine diurnal variation numerical value W；
Wherein, DiIt is D for n known station day parameters evidencesi, i=1,2 ..., n, piFor each known station to tested point
Weight be pi, W is unknown point diurnal variation numerical value.
To achieve the above object, the present invention provides following schemes:
A kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines system, the system comprises:
Module is obtained, for obtaining the longitude and latitude of the known station and unknown point；
Computing module, for calculating described known according to the longitude and latitude of the station and the longitude and latitude of the unknown point
It stands and the difference of latitude and distance of the unknown point；
Weight determining module, for determining weight according to the difference of latitude and the distance；
Diurnal variation numerical value determining module determines diurnal variation numerical value for the weight to be substituted into Tonghua processing observational equation.
Optionally, the computing module, specifically includes:
Difference of latitude computing unit, for as the longitude and latitude (x for setting the stationA、yA), the longitude and latitude of the unknown point is
(xB、yB), pass through formula x=xB-xACalculate the difference of latitude of the known station and the unknown point；
Metrics calculation unit, for passing through formulaCalculate the known station and institute
State the distance d of unknown pointAB。
Optionally, the known station is the station of the unknown point in setting search radius, and quantity is n.
Optionally, the weight determining module, specifically includes:
Weight determination unit is used for the difference of latitude Δ LatiWith the distanceSubstitute into formula
Determine weight pi；
Wherein, Δ LatiFor the difference of latitude of tested point and i-th of station, Δ Lati> 2, u indicate each website to unknown point
The index of distance is any positive real number,For the distance of i-th of website to unknown point.
Optionally, the diurnal variation numerical value determining module, specifically includes:
Diurnal variation numerical value determination unit is used for the weight piIt substitutes into Tonghua and handles observational equation
Determine diurnal variation numerical value W；
Wherein, DiIt is D for n known station day parameters evidencesi, i=1,2 ..., n, piFor each known station to tested point
Weight be pi, W is unknown point diurnal variation numerical value.
The specific embodiment provided according to the present invention, the invention discloses following technical effects: the present invention provides a kind of base
Method is determined in the geomagnetic diurnal variations numerical value of difference of latitude and distance.The described method includes: obtaining the warp of the known station and unknown point
Latitude；According to the longitude and latitude of the longitude and latitude of the station and the unknown point, the known station and the unknown point are calculated
Difference of latitude and distance；According to the difference of latitude and the distance, weight is determined；The weight is substituted into Tonghua processing observation side
Journey determines diurnal variation numerical value.Tonghua result of the invention considers earth's magnetic field spatial variations characteristic, on the basis of distance fixed power
Increase influence of the Geomagnetic Station measurement data difference of latitude in weight, by the distance between the known station and unknown point influence compared with
Small, Tonghua precision is higher.
Detailed description of the invention
It in order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, below will be to institute in embodiment
Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention
Example, for those of ordinary skill in the art, without any creative labor, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is Geomagnetic Station of embodiment of the present invention measurement data Tonghua processing system composition figure；
Fig. 2 determines method flow diagram based on the geomagnetic diurnal variations numerical value of difference of latitude and distance for the embodiment of the present invention；
Fig. 3 determines system construction drawing based on the geomagnetic diurnal variations numerical value of difference of latitude and distance for the embodiment of the present invention.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
In order to make the foregoing objectives, features and advantages of the present invention clearer and more comprehensible, with reference to the accompanying drawing and specific real
Applying mode, the present invention is described in further detail.
Using the measurement data of Geomagnetic Station in search radius certain around unknown point, difference of latitude and distance are taken into account, for ground
Magnetic station measurement data Tonghua is handled to determine power, and then interpolation obtains the geomagnetic diurnal change data of the point, and the data is made next
The application of step.Geomagnetic Station corollary equipment has the dIdD vector magnetic meter for geomagnetic measurement, for earth magnetism absolute observations
Observation devices, the communication system for data transfer and the equipment power supply system such as the absolute magnetometer of Overhouser
Deng.System composition is as shown in Figure 1.
In the processing of Geomagnetic Station measurement data Tonghua, the observation data of several stations determine power according to a certain rule
Value, and according to different weight read group total average value.Assuming that having n known station day parameters evidences is Di(i=1,2 ..., n),
The weight of each station to tested point is pi, unknown point day variable value is W, then has
The key of this method is how to determine the power of each station.Common practice is to take to calculate the distance that point arrives each station
Inverse as weight.If the distance of each station to unknown point is di(i=1,2 ..., n), then with the inverse of distance u power
For the calculation formula of weight are as follows:
Wherein u indicates that each website is any positive real number to the index of unknown point distance；If di< 10km, pi1 is taken,
It is that method is weighed in traditional geomagnetic data Tonghua surely that this weighs method surely.
But by the analysis of earth's magnetic field spatial variations characteristic it is found that spatial variations of the earth's magnetic field on latitude direction are obvious
Greater than the variation in longitudinal.Therefore, we have proposed a kind of Geomagnetic Station measurement data for taking the meridional difference and distance into account is logical
The double factor for changing processing weighs method surely.
It is in the fixed power of distance that the double factor for taking Geomagnetic Station measurement data Tonghua processing of the meridional difference and distance into account weighs method surely
On the basis of increase influence of the difference of latitude in power.According to earth's magnetic field change in time and space characteristic, Geomagnetic Station is on latitude direction
Difference is bigger, and day change data difference is bigger, and weight is smaller.Calculation formula is
Wherein if di< 10km, piTake 1.ΔLatiFor the difference of latitude of tested point and i-th of station, Δ Lati>2。
Fig. 2 determines method flow diagram based on the geomagnetic diurnal variations numerical value of difference of latitude and distance for the embodiment of the present invention.Such as Fig. 2
Shown, a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines method, which comprises
Step 101: obtaining the longitude and latitude of the known station and unknown point, the known station is that the unknown point is searched in setting
The station in rope radius, quantity are n.
Step 102: according to the longitude and latitude of the longitude and latitude of the station and the unknown point, calculating the known station and institute
State the difference of latitude and distance of unknown point；It specifically includes:
If longitude and latitude (the x of the stationA、yA), the longitude and latitude of the unknown point is (xB、yB), pass through formula x=xB-xA
Calculate the difference of latitude of the known station and the unknown point；
Pass through formulaCalculate the distance of the known station and the unknown point
dAB。
Step 103: it according to the difference of latitude and the distance, determines weight, specifically includes:
By the difference of latitude Δ LatiWith the distanceSubstitute into formulaDetermine weight pi；
Wherein, Δ LatiFor the difference of latitude of tested point and i-th of station, Δ Lati> 2, u indicate each website to unknown point
The index of distance is any positive real number,For the distance of i-th of website to unknown point.
Step 104: the weight is substituted into Tonghua processing observational equation, diurnal variation numerical value is determined, specifically includes:
By the weight piIt substitutes into Tonghua and handles observational equationDetermine diurnal variation numerical value W；
Wherein, DiIt is D for n known station day parameters evidencesi, i=1,2 ..., n, piFor each known station to tested point
Weight be pi, W is unknown point diurnal variation numerical value.
The present invention provides a kind of double factors of Geomagnetic Station measurement data Tonghua processing for taking the meridional difference and distance into account to weigh surely
Method increases influence of the Geomagnetic Station measurement data latitude durection component difference in weight on the basis of distance fixed power,
And then interpolation obtains the day parameter evidence of unknown point, and interpolation results precision is higher, the actual physics category with this area day parameter evidence
The property goodness of fit is also fine.The invention solves fixed temporary existing by distance when the processing of traditional Geomagnetic Station measurement data Tonghua
Defect can not only calculate and obtain that desert, marsh, glacier, virgin forest, land-sea interface etc. is some is difficult to carry out the survey of ground magnetic force
Measure the geomagnetic diurnal change data in region, or global hot spot and the earth-magnetism navigation of key area, geomagnetic matching, earthquake prediction,
The fields such as mineral products investigation provide reliable earth magnetism basic data support.
The invention has the following advantages over the prior art:
Tonghua result considers earth's magnetic field spatial variations characteristic, increases Geomagnetic Station measurement on the basis of distance fixed power
Influence of the data difference of latitude in weight, is influenced smaller by the distance between the known station and unknown point, and Tonghua precision is higher；
The correlation of calculated result and the practical magnetic survey data of unknown point is very high, reflects the practical earth magnetism of unknown point substantially
The basic physical attribute of measurement data.
Fig. 3 determines system construction drawing based on the geomagnetic diurnal variations numerical value of difference of latitude and distance for the embodiment of the present invention.Such as Fig. 3
Shown, a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines system, the system comprises:
Module 201 is obtained, for obtaining the longitude and latitude of the known station and unknown point；
Computing module 202, for calculating known described according to the longitude and latitude of the station and the longitude and latitude of the unknown point
The difference of latitude and distance of the station and the unknown point；
Weight determining module 203, for determining weight according to the difference of latitude and the distance；
Diurnal variation numerical value determining module 204 determines diurnal variation number for the weight to be substituted into Tonghua processing observational equation
Value.
The computing module 202, specifically includes:
Difference of latitude computing unit, for as the longitude and latitude (x for setting the stationA、yA), the longitude and latitude of the unknown point is
(xB、yB), pass through formula x=xB-xACalculate the difference of latitude of the known station and the unknown point；
Metrics calculation unit, for passing through formulaCalculate the known station and institute
State the distance d of unknown pointAB。
The known station is the station of the unknown point in setting search radius, and quantity is n.
The weight determining module 203, specifically includes:
Weight determination unit is used for the difference of latitude Δ LatiWith the distanceSubstitute into formula
Determine weight pi；
Wherein, Δ LatiFor the difference of latitude of tested point and i-th of station, Δ Lati> 2, u indicate each website to unknown point
The index of distance is any positive real number,For the distance of i-th of website to unknown point.
The diurnal variation numerical value determining module 204, specifically includes:
Diurnal variation numerical value determination unit is used for the weight piIt substitutes into Tonghua and handles observational equation
Determine diurnal variation numerical value W；
Wherein, DiIt is D for n known station day parameters evidencesi, i=1,2 ..., n, piFor each known station to tested point
Weight be pi, W is unknown point diurnal variation numerical value.
Each embodiment in this specification is described in a progressive manner, the highlights of each of the examples are with other
The difference of embodiment, the same or similar parts in each embodiment may refer to each other.For system disclosed in embodiment
For, since it is corresponded to the methods disclosed in the examples, so being described relatively simple, related place is said referring to method part
It is bright.
Used herein a specific example illustrates the principle and implementation of the invention, and above embodiments are said
It is bright to be merely used to help understand method and its core concept of the invention；At the same time, for those skilled in the art, foundation
Thought of the invention, there will be changes in the specific implementation manner and application range.In conclusion the content of the present specification is not
It is interpreted as limitation of the present invention.
Claims (10)
1. a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines method, which is characterized in that the described method includes:
Obtain the longitude and latitude of the known station and unknown point；
According to the longitude and latitude of the longitude and latitude of the station and the unknown point, the latitude of the known station and the unknown point is calculated
Degree difference and distance；
According to the difference of latitude and the distance, weight is determined；
The weight is substituted into Tonghua processing observational equation, determines diurnal variation numerical value.
2. the geomagnetic diurnal variations numerical value according to claim 1 based on difference of latitude and distance determines method, which is characterized in that
It is described according to the longitude and latitude of the station and the longitude and latitude of the unknown point, calculate the latitude of the known station and the unknown point
Degree difference and distance, specifically include:
If longitude and latitude (the x of the stationA、yA), the longitude and latitude of the unknown point is (xB、yB), pass through formula x=xB-xAIt calculates
The difference of latitude of the known station and the unknown point；
Pass through formulaCalculate the distance d of the known station and the unknown pointAB。
3. the geomagnetic diurnal variations numerical value according to claim 1 based on difference of latitude and distance determines method, which is characterized in that
The known station is the station of the unknown point in setting search radius, and quantity is n.
4. the geomagnetic diurnal variations numerical value according to claim 3 based on difference of latitude and distance determines method, which is characterized in that
It is described that weight is determined according to the difference of latitude and the distance, it specifically includes:
By the difference of latitude Δ LatiWith the distanceSubstitute into formulaDetermine weight pi；
Wherein, Δ LatiFor the difference of latitude of tested point and i-th of station, Δ Lati> 2, u indicate each website to unknown point distance
Index, for any positive real number,For the distance of i-th of website to unknown point.
5. the geomagnetic diurnal variations numerical value according to claim 4 based on difference of latitude and distance determines method, which is characterized in that
It is described that the weight is substituted into Tonghua processing observational equation, it determines diurnal variation numerical value, specifically includes:
By the weight piIt substitutes into Tonghua and handles observational equationDetermine diurnal variation numerical value W；
Wherein, DiIt is D for n known station day parameters evidencesi, i=1,2 ..., n, piFor the power of each known station to tested point
Value is pi, W is unknown point diurnal variation numerical value.
6. a kind of geomagnetic diurnal variations numerical value based on difference of latitude and distance determines system, which is characterized in that the system comprises:
Module is obtained, for obtaining the longitude and latitude of the known station and unknown point；
Computing module, for according to the longitude and latitude of the station and the longitude and latitude of the unknown point, calculate the known station and
The difference of latitude and distance of the unknown point；
Weight determining module, for determining weight according to the difference of latitude and the distance；
Diurnal variation numerical value determining module determines diurnal variation numerical value for the weight to be substituted into Tonghua processing observational equation.
7. the geomagnetic diurnal variations numerical value according to claim 6 based on difference of latitude and distance determines system, which is characterized in that
The computing module, specifically includes:
Difference of latitude computing unit, for as the longitude and latitude (x for setting the stationA、yA), the longitude and latitude of the unknown point is (xB、yB),
Pass through formula x=xB-xACalculate the difference of latitude of the known station and the unknown point；
Metrics calculation unit, for passing through formulaCalculate the known station and it is described to
Seek distance d a littleAB。
8. the geomagnetic diurnal variations numerical value according to claim 6 based on difference of latitude and distance determines system, which is characterized in that
The known station is the station of the unknown point in setting search radius, and quantity is n.
9. the geomagnetic diurnal variations numerical value according to claim 8 based on difference of latitude and distance determines system, which is characterized in that
The weight determining module, specifically includes:
Weight determination unit is used for the difference of latitude Δ LatiWith the distanceSubstitute into formulaIt determines
Weight pi；
Wherein, Δ LatiFor the difference of latitude of tested point and i-th of station, Δ Lati> 2, u indicate each website to unknown point distance
Index, for any positive real number,For the distance of i-th of website to unknown point.
10. the geomagnetic diurnal variations numerical value according to claim 9 based on difference of latitude and distance determines that system, feature exist
In the diurnal variation numerical value determining module specifically includes:
Diurnal variation numerical value determination unit is used for the weight piIt substitutes into Tonghua and handles observational equationIt determines
Diurnal variation numerical value W；
Wherein, DiIt is D for n known station day parameters evidencesi, i=1,2 ..., n, piFor the power of each known station to tested point
Value is pi, W is unknown point diurnal variation numerical value.
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| CN110109185A (en) * | 2019-06-06 | 2019-08-09 | 中南大学 | A kind of passive field source two dimensional electric field exploitation method of the height translocations in more days based on frequency selection method |
| CN110109184A (en) * | 2019-06-06 | 2019-08-09 | 中南大学 | A kind of passive field source class three-dimensional electric field exploitation method based on more days heights |
| CN115356775A (en) * | 2022-09-01 | 2022-11-18 | 中国自然资源航空物探遥感中心 | Virtual station construction method based on multi-geomagnetic station daily variation correction |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110082830A (en) * | 2019-05-23 | 2019-08-02 | 深圳市新禾源投资咨询研究中心(有限合伙) | A kind of underground mineral resources detection method and system |
| CN110082830B (en) * | 2019-05-23 | 2021-09-07 | 深圳市新禾源投资咨询研究中心(有限合伙) | Underground mineral resource detection method and system |
| CN110109185A (en) * | 2019-06-06 | 2019-08-09 | 中南大学 | A kind of passive field source two dimensional electric field exploitation method of the height translocations in more days based on frequency selection method |
| CN110109184A (en) * | 2019-06-06 | 2019-08-09 | 中南大学 | A kind of passive field source class three-dimensional electric field exploitation method based on more days heights |
| CN115356775A (en) * | 2022-09-01 | 2022-11-18 | 中国自然资源航空物探遥感中心 | Virtual station construction method based on multi-geomagnetic station daily variation correction |
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Application publication date: 20181218 |