CN108205148A - The quick method and its device for establishing national coordinate frame benchmark - Google Patents
The quick method and its device for establishing national coordinate frame benchmark Download PDFInfo
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- CN108205148A CN108205148A CN201611178900.0A CN201611178900A CN108205148A CN 108205148 A CN108205148 A CN 108205148A CN 201611178900 A CN201611178900 A CN 201611178900A CN 108205148 A CN108205148 A CN 108205148A
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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
- G01S19/00—Satellite radio beacon positioning systems; Determining position, velocity or attitude using signals transmitted by such systems
- G01S19/38—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system
- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/42—Determining position
Abstract
The present invention relates to technical field of mapping, disclose a kind of method and its device of quick foundation whole nation coordinate frame benchmark.In the present invention, the method for the quick foundation whole nation coordinate frame benchmark includes the following steps：GNSS data observation, acquisition are carried out on the datum mark to be asked of operating area；Calculate current epoch coordinate of the datum mark to be asked under ITRF frames；Obtain land state net base station velocity field information；Velocity field model in the whole country is established according to base station velocity field information；Benchmark spot speed to be asked is calculated according to velocity field model；Transferring frame is carried out according to benchmark spot speed to be asked, current epoch coordinate of the datum mark to be asked under ITRF frames is converted into CGCS2000 frame coordinates.Without the high-grade control point of country, you can quick to establish country's CGCS2000 coordinate frame benchmark in the whole country.
Description
Technical field
The present invention relates to technical field of mapping, the more particularly to quick technology for establishing national coordinate frame benchmark.
Background technology
On July 1st, 2008, China formally enable new the earth's core three-dimensional earth coordinates CGCS2000 comprehensively.
CGCS2000 is the abbreviation of 2000 national earth coordinates, belongs to the earth's core geodetic coordinate system, the system is with ITRF
On the basis of 97 reference frames, reference frame epoch is 2000.0.
ITRF is the abbreviation of International Terrestrial Reference Frame, i.e., International Geophysical refers to
Frame is an errestrial reference frame.It is defined by the coordinate and movement velocity of space geodetic surveying observation station, is international
The ground reference frame of Earth Rotation Service is the specific implementation of International Geophysical frame of reference (ITRS), it is done with very long baseline
It relates to the space geodesy techniques such as measurement, satellite laser ranging (SLR), lunar laser ranging(LLR), GPS and Doppler Orbitograph and Radio Positioning Intergrated by Satellite and forms the whole world or local
Geodesic survey frame.For at present, ITRF is internationally recognized most widely used, the highest EFEC coordinate frame of precision.
Regional the earth's core that the national earth coordinates in China 2000 are just defined in ITRS2000 geocentric coordinate systems is sat
Mark frame.
Mapping geography information office of country requires to establish the relatively independent plane coordinates system in various regions and 2000 country's the earth are sat
The effective connection of system is marked, and uses time of 8-10, completes existing country's earth coordinates to 2000 country's earth coordinates
Transition and conversion.
Currently, the side for establishing the high-grade control point translocation of generally use and country of national CGCS2000 coordinate frames benchmark
Method mainly includes the following steps that：
According to the position of website, the high-grade control point of homogenization selection surrounding countries；
Coordinate results (CGCS2000) from country's mapping geography information department application control point；
By website control point progress translocation high-grade with country；
CGCS2000 coordinate results are obtained by Baseline Survey, net adjusted data, that is, realize CGCS2000 coordinate frame benchmark
It establishes.
It was found by the inventors of the present invention that following shortcoming exists in the prior art：
(1) it needs to carry out coordinate results application；
(2) it is longer to establish the period, it usually needs -15 days or so 10 days (time of the application containing coordinate results)；
(3) it is higher (needing to increase the high-grade control point Observation personnel of country, equipment etc.) to establish cost for coordinate frame.
Therefore, the defects of how overcoming present in the prior art realizes a kind of national coordinate frame benchmark of quick foundation
Method be current this field research emphasis.
Invention content
The purpose of the present invention is to provide a kind of method and its device of quick foundation whole nation coordinate frame benchmark, without state
The high-grade control point of family, you can quick to establish country's CGCS2000 coordinate frame benchmark in the whole country.
In order to solve the above technical problems, embodiments of the present invention disclose a kind of national coordinate frame benchmark of quick foundation
Method, include the following steps：
GNSS data observation, acquisition are carried out on the datum mark to be asked of operating area；
Calculate current epoch coordinate of the datum mark to be asked under ITRF frames；
Obtain land state net base station velocity field information；
Velocity field model in the whole country is established according to base station velocity field information；
Benchmark spot speed to be asked is calculated according to velocity field model；
Transferring frame is carried out according to benchmark spot speed to be asked, by current epoch coordinate of the datum mark to be asked under ITRF frames
Be converted to CGCS2000 frame coordinates.
Embodiments of the present invention also disclose a kind of device of quick foundation whole nation coordinate frame benchmark, including：
GNSS data collecting unit, for carrying out GNSS data observation, acquisition on the datum mark to be asked of operating area；
ITRF coordinate calculating units, for calculating current epoch coordinate of the datum mark to be asked under ITRF frames；
Acquiring unit, for obtaining land state net base station velocity field information；
Modeling unit, for establishing velocity field model in the whole country according to base station velocity field information；
Speed computing unit, for calculating benchmark spot speed to be asked according to velocity field model；
Converting unit, for carrying out transferring frame according to benchmark spot speed to be asked, by datum mark to be asked under ITRF frames
Current epoch coordinate be converted to CGCS2000 frame coordinates.
Compared with prior art, the main distinction and its effect are embodiment of the present invention：
Without the high-grade control point of country, you can quick to establish country's CGCS2000 coordinate frame benchmark in the whole country.
Further, the method for the quick foundation whole nation coordinate frame benchmark is not needed to from mapping geography information portion of country
The coordinate results at door application control point.
Further, the method for the quick foundation whole nation coordinate frame benchmark, it is shorter that coordinate frame establishes the period, usually only
Need 2-3 days or so.
Further, the method for the quick foundation whole nation coordinate frame benchmark, without the high-grade control point of country, coordinate frame
It is relatively low that frame establishes cost.
Description of the drawings
Fig. 1 is a kind of flow signal of method of quick foundation whole nation coordinate frame benchmark in first embodiment of the invention
Figure；
Fig. 2 is a kind of structural representation of the device of quick foundation whole nation coordinate frame benchmark in second embodiment of the invention
Figure.
Specific embodiment
In the following description, in order to make the reader understand this application better, many technical details are proposed.But this
Even if the those of ordinary skill in field is appreciated that without these technical details and many variations based on the following respective embodiments
And modification, each claim of the application technical solution claimed can also be realized.
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with implementation of the attached drawing to the present invention
Mode is described in further detail.
First embodiment of the invention is related to a kind of method of quick foundation whole nation coordinate frame benchmark.Fig. 1 is that this is quick
Establish the flow diagram of the method for national coordinate frame benchmark.
Specifically, as shown in Figure 1, the method for the quick foundation whole nation coordinate frame benchmark includes the following steps：
In a step 101, GNSS data observation, acquisition are carried out on the datum mark to be asked of operating area.
GNSS is the abbreviation of Global Navigation Satellite System, and full name is Global Satellite Navigation System
Or Global Navigation Satellite System, it is to refer to all satellite navigation systems, such as beautiful including the whole world, region and enhancing
The GPS of state, the Glonass of Russia, the Galileo in Europe, the Beidou satellite navigation system of China and relevant enhancing system
System, the EGNOS (European geostationary Navigation Overlay System) of WAAS (wide area enhancement system), Europe such as the U.S. and the MSAS of Japan
(Multi-functional transporting Satellite Augmentation System) etc. is also contemplated by building and other that be built satellite navigation system later.
In the present embodiment, it is preferable that in step 101, the time is 0. -24 point of UTC time.
UTC time is the abbreviation of Coordinated Universal Time, is the Coordinated Universal Time(UTC), when also known as the world unifies
Between, universal time or international coordination time.
Time be 0. -24 point of UTC time, refer to observation, acquisition be UTC time intraday data.
Then into step 102, current epoch coordinate of the datum mark to be asked under ITRF frames is calculated.
Datum mark to be asked is calculated based on the current epoch coordinate under ITRF frames using high-precision GNSS data processing software.
Due to the influence of nutating, Ghandler motion etc., ITRF frames are all changing every year, can all there is several centimetres of movement every year.Cause
This, coordinate is not fixed under ITRF frames, it should be noted that coordinate when.
Then into step 103, land state net base station velocity field information is obtained.
Land state net is the abbreviation of " China's Mainland structural environment monitoring network ".China's Mainland structural environment monitoring network is to defend
Based on star navigation positioning system (GNSS) observation, it is aided with the skies such as very long baseline interferometry(VLBI (VLBI) satellite laser ranging (SLR)
Between technology, and combine the accurate multiple technologies means such as gravity and the measurement of the level, built up by 260 continuous observations and 2000 not
High-precision, high-spatial and temporal resolution and independent research data processing system that periodic observation website is formed, covering China's Mainland
Observation grid.
In step 103, " China's Mainland structural environment monitoring network " 260 GNSS base station velocity field information are obtained.
Due to the influence of nutating, Ghandler motion etc., ITRF frames are all changing every year, and coordinate is unfixed, can all be had every year
Several centimetres of movement, therefore the position of GNSS base stations is not just fixed yet.The common structure of velocity vector of multiple base stations
Into a velocity field.
Then into step 104, velocity field model in the whole country is established according to base station velocity field information.
In the present embodiment, it is preferable that the determining method for establishing velocity field model weight in the whole country is anti-distance
The method of weighting：
Weighting function is：
Wherein, W is weight, and p is an arbitrary arithmetic number, usual p=2；
S is distance of the interpolation point (datum mark to be asked) to discrete point (260 GNSS base stations),
Formula is：
Wherein, the latitude and longitude coordinates of (B, L) for interpolation point, (Bi,Li) be discrete point latitude and longitude coordinates.
Interpolation point (datum mark to be asked) speed：
V(Bi,Li) on the basis of the speed stood.
Quantity of the n for GNSS base stations, that is, 260.
Further, it is preferable to ground, the determining method of p value, include the following steps：
1. being empirically worth, the usual values of p are in section 0.5-3, you can obtain ideal as a result, now by section 0.5-3 by step
Long 0.1 is split, and obtains different p values；
2. according to the velocity field model of different p value and above-mentioned formula (1), the speed that national periphery IGS websites are obtained is inserted
Value；
IGS is world GNSS Servers Organizations, and predecessor is International GPS Service tissue.The quality data and product that IGS is provided
It is used for the multiple fields such as geoscience research.Add in IGS website can to this organize data center send observation data,
Navigation data and meteorological data.
In global 260 Duo Ge IGS tracking stations, China accounts for more than 20, be distributed in Wuhan, Lhasa, Urumchi, Kunming, on
The ground such as sea.
3. calculate IGS websites speed interpolation and ITRF officials announce velocity amplitude squared difference and evolution value Δ d, i.e.,Wherein, Δ X, Δ Y, Δ Z are the speed interpolation of the IGS websites and ITRF public affairs
The velocity amplitude of the IGS websites of cloth is in the difference of three change in coordinate axis direction；
Meet 4. calculatingP value, which is p value to be determined, and m is the number of IGS websites
Amount.
Then into step 105, benchmark spot speed to be asked is calculated according to velocity field model.
Benchmark spot speed to be asked is calculated using the velocity field model of above-mentioned formula (1).
Then into step 106, transferring frame is carried out according to benchmark spot speed to be asked, by the datum mark to be asked in ITRF
Current epoch coordinate under frame is converted to CGCS2000 frame coordinates.
Step 106 is obtained in current epoch coordinate and step 105 under the ITRF frames obtained according to step 102
Speed under ITRF frames, the common coordinate calculated under CGCS2000 frames.
It should be noted that it is ripe according to the coordinate that the coordinate under a frame and speed are calculated under another frame
The prior art no longer does specific elaboration in embodiments of the present invention.
Further, it is preferable to ground, in step 106,
It will according to the ITRF frames that ITRF is announced and 14 conversion parameters of CGCS2000 frames and benchmark spot speed to be asked
Current epoch coordinate of the datum mark to be asked under ITRF frames is converted to CGCS2000 frame coordinates.
CGCS2000 is 2000 national earth coordinates, belongs to the earth's core geodetic coordinate system, which is referred to ITRF97
On the basis of frame, reference frame epoch is 2000.0.
14 conversion parameters include the rate of 7 conversion parameters and 7 conversion parameters.
7 conversion parameters include：
(1) three coordinate translation amount (△ X, △ Y, △ Z), i.e. two spaces coordinate system (ITRF frames and CGCS2000 frames
Frame) coordinate origin between coordinate difference；
The rotation angle (△ α, △ β, △ γ) of (2) three reference axis, angle is specified by rotating three reference axis in order
Degree, can make the XYZ overlapping of axles of two spaces rectangular coordinate system together.
(3) lenth ratio of same section of straight line in scale factor K, i.e. two spaces coordinate system realizes the ratio of scale
Conversion, usual K values are no better than 1.
The method of the quick foundation whole nation coordinate frame benchmark can be adapted for satellite positioning continuous operation base station net, state
In family's base surveying and/or GIS-Geographic Information System.
The method of the quick foundation whole nation coordinate frame benchmark, can reach following technique effect：
(1) it does not need to carry out coordinate results application；
(2) it is shorter to establish the period, it usually needs 2-3 days or so；
(3) it is relatively low (without the high-grade control point of country) to establish cost for coordinate frame.
Therefore, the method for quick foundation whole nation coordinate frame benchmark disclosed in this invention, effectively overcomes the prior art
Present in defect, without the high-grade control point of country, you can quick to establish country's CGCS2000 coordinate frames in the whole country
Benchmark.
The each method embodiment of the present invention can be realized in a manner of software, hardware, firmware etc..No matter the present invention be with
Software, hardware or firmware mode realize that instruction code may be stored in any kind of computer-accessible memory
In (such as permanent either revisable volatibility is either non-volatile solid or non-solid, it is fixed or
Replaceable medium of person etc.).Equally, memory may, for example, be programmable logic array (Programmable Array
Logic, referred to as " PAL "), random access memory (Random Access Memory, referred to as " RAM "), programmable read-only deposit
Reservoir (Programmable Read Only Memory, referred to as " PROM "), read-only memory (Read-Only Memory, letter
Claim " ROM "), electrically erasable programmable read-only memory (Electrically Erasable Programmable ROM, referred to as
" EEPROM "), disk, CD, digital versatile disc (Digital Versatile Disc, referred to as " DVD ") etc..
Second embodiment of the invention is related to a kind of device of quick foundation whole nation coordinate frame benchmark.Fig. 2 is that this is quick
Establish the structure diagram of the device of national coordinate frame benchmark.
Specifically, as shown in Fig. 2, the device of the quick foundation whole nation coordinate frame benchmark includes：
GNSS data collecting unit, for carrying out GNSS data observation, acquisition on the datum mark to be asked of operating area.
ITRF coordinate calculating units, for calculating current epoch coordinate of the datum mark to be asked under ITRF frames.
Acquiring unit, for obtaining land state net base station velocity field information.
Modeling unit, for establishing velocity field model in the whole country according to base station velocity field information.
Further, it is preferable to ground, the velocity field model that modeling unit is established are：
Wherein, (B, L) is the latitude and longitude coordinates of datum mark to be asked, and V (B, L) is the speed of datum mark to be asked, and is stood on the basis of n
Quantity, WiFor weighting function, andWherein p is an arbitrary arithmetic number, and S is arrived for datum mark to be asked
The distance of base station, (Bi,Li) on the basis of the latitude and longitude coordinates stood, V (Bi,Li) on the basis of the speed stood.
Further, it is preferable that p value determination subelement is further included in modeling unit, for determining p value above；
The p value determination subelement includes the following steps during p value is determined：
1. section 0.5-3 is split by step-length 0.1, different p values is obtained；
2 according to the velocity field model of different p value and above-mentioned formula (1), and the speed for calculating national periphery IGS websites is inserted
Value；
3. calculate the squared difference of the speed interpolation and the velocity amplitude of the ITRF IGS websites announced of the IGS websites
The evolution value Δ d of sum, i.e.,：Wherein, Δ X, Δ Y, Δ Z are the IGS websites
The velocity amplitude of the IGS websites that speed interpolation and ITRF are announced is in the difference of three change in coordinate axis direction；
Meet 4. calculatingWhen p value, which is p value to be determined, and m is whole nation periphery IGS
The quantity of website.
Speed computing unit, for calculating benchmark spot speed to be asked according to velocity field model.
Speed computing unit calculates benchmark spot speed to be asked using the velocity field model of above-mentioned formula (1).
Converting unit, for carrying out transferring frame according to benchmark spot speed to be asked, by the datum mark to be asked in ITRF frames
Current epoch coordinate under frame is converted to CGCS2000 frame coordinates.
Converting unit is according to 14 conversion parameters of the ITRF frames that ITRF is announced with CGCS2000 frames and benchmark to be asked
Current epoch coordinate of the datum mark to be asked under ITRF frames is converted to CGCS2000 frame coordinates by spot speed.
It should be noted that it is ripe according to the coordinate that the coordinate under a frame and speed are calculated under another frame
The prior art no longer does specific elaboration in embodiments of the present invention.
Without the high-grade control point of country, you can quick to establish country's CGCS2000 coordinate frame benchmark in the whole country.
First embodiment is can to implement with the corresponding method embodiment of present embodiment, present embodiment with first
Mode is worked in coordination implementation.The relevant technical details mentioned in first embodiment are still effective in the present embodiment, in order to
It reduces and repeats, which is not described herein again.Correspondingly, the relevant technical details mentioned in present embodiment are also applicable in the first implementation
In mode.
It should be noted that each unit mentioned in each equipment embodiment of the present invention is all logic unit, physically,
One logic unit can be a part for a physical unit or a physical unit, can also be with multiple physics
The combination of unit realizes that the Physical realization of these logic units in itself is not most important, these logic units institute is real
The combination of existing function is only the key for solving the technical issues of proposed by the invention.In addition, in order to protrude the innovation of the present invention
Part, the above-mentioned each equipment embodiment of the present invention not will with to solve the technical issues of proposed by the invention relationship less close
Unit introduce, this does not indicate above equipment embodiment and there is no other units.
It should be noted that in the claim and specification of this patent, such as first and second or the like relationship
Term is used merely to distinguish one entity or operation from another entity or operation, without necessarily requiring or implying
There are any actual relationship or orders between these entities or operation.Moreover, term " comprising ", "comprising" or its
Any other variant is intended to non-exclusive inclusion so that process, method, article including a series of elements or
Equipment not only include those elements, but also including other elements that are not explicitly listed or further include for this process,
Method, article or the intrinsic element of equipment.In the absence of more restrictions, it is wanted by what sentence limited " including one "
Element, it is not excluded that also there are other identical elements in the process, method, article or apparatus that includes the element.
Although by referring to some of the preferred embodiment of the invention, the present invention is shown and described,
It will be understood by those skilled in the art that can to it, various changes can be made in the form and details, without departing from this hair
Bright spirit and scope.
Claims (10)
- A kind of 1. method of quick foundation whole nation coordinate frame benchmark, which is characterized in that include the following steps：GNSS data observation, acquisition are carried out on the datum mark to be asked of operating area；Current epoch coordinate of the datum mark to be asked described in calculating under ITRF frames；Obtain land state net base station velocity field information；Velocity field model in the whole country is established according to the base station velocity field information；The benchmark spot speed to be asked according to calculating the velocity field model；Transferring frame is carried out according to the benchmark spot speed to be asked, by current epoch of the datum mark to be asked under ITRF frames Coordinate is converted to CGCS2000 frame coordinates.
- 2. the method for quick foundation whole nation coordinate frame benchmark according to claim 1 the, which is characterized in that in " root According to the base station velocity field information establish the whole country in velocity field model " the step of in, the velocity field model is：Wherein, (B, L) is the latitude and longitude coordinates of datum mark to be asked, and V (B, L) is the speed of datum mark to be asked, the number stood on the basis of n Amount, WiFor weighting function, andWherein p is an arbitrary arithmetic number, and S is datum mark to be asked to benchmark The distance stood, (Bi,Li) on the basis of the latitude and longitude coordinates stood, V (Bi,Li) on the basis of the speed stood.
- 3. the method for quick foundation whole nation coordinate frame benchmark according to claim 2, which is characterized in that the p value The method of determining includes the following steps：Section 0.5-3 by step-length 0.1 is split, obtains different p values；According to the different p value and the velocity field model, the speed interpolation of national periphery IGS websites is calculated；Calculate the velocity amplitude of the IGS websites that the speed interpolation of the IGS websites and ITRF are announced squared difference and open Side value Δ d, i.e.,：Wherein, Δ X, Δ Y, Δ Z are that the speed of the IGS websites is inserted The velocity amplitude of the IGS websites that value and ITRF are announced is in the difference of three change in coordinate axis direction；It calculates and meetsWhen p value, wherein, m is the quantity of national periphery IGS websites.
- 4. the method for quick foundation whole nation coordinate frame benchmark according to claim 1 the, which is characterized in that in " root Carry out transferring frame according to the benchmark spot speed to be asked " the step of in, according to the ITRF frames that ITRF is announced and CGCS2000 frames 14 conversion parameters of frame and the benchmark spot speed to be asked carry out transferring frame.
- 5. the method for quick foundation whole nation coordinate frame benchmark according to claim 4, which is characterized in that described 14 turn Change the rate that parameter includes 7 parameters and 7 parameters；3 coordinate translation amounts of 7 parameters including two spaces coordinate system, the rotation angle and 1 scale of 3 reference axis The factor.
- 6. the method for quick foundation whole nation coordinate frame benchmark according to any one of claim 1 to 5, feature exist In in the step of " carrying out GNSS data observation, acquisition on the datum mark to be asked of operating area ", the time is UTC time 0 Point -24 point.
- 7. the method for quick foundation whole nation coordinate frame benchmark according to claim 6, which is characterized in that the quick foundation The method of national coordinate frame benchmark is suitable for satellite positioning continuous operation base station net, national basis mapping and/or geographical letter In breath system.
- 8. a kind of device of quick foundation whole nation coordinate frame benchmark, which is characterized in that including：GNSS data collecting unit, for carrying out GNSS data observation, acquisition on the datum mark to be asked of operating area；ITRF coordinate calculating units, for calculating the current epoch coordinate of the datum mark to be asked under ITRF frames；Acquiring unit, for obtaining land state net base station velocity field information；Modeling unit, for establishing velocity field model in the whole country according to the base station velocity field information；Speed computing unit, for the benchmark spot speed to be asked according to velocity field model calculating；Converting unit carries out transferring frame, by the datum mark to be asked in ITRF frames for benchmark spot speed to be asked according to Current epoch coordinate under frame is converted to CGCS2000 frame coordinates.
- 9. the device of quick foundation whole nation coordinate frame benchmark according to claim 8, which is characterized in that the modeling is single Member establish velocity field model be：Wherein, (B, L) is the latitude and longitude coordinates of datum mark to be asked, and V (B, L) is the speed of datum mark to be asked, the number stood on the basis of n Amount, WiFor weighting function, andWherein p is an arbitrary arithmetic number, and S is datum mark to be asked to benchmark The distance stood, (Bi,Li) on the basis of the latitude and longitude coordinates stood, V (Bi,Li) on the basis of the speed stood.
- 10. the device of quick foundation whole nation coordinate frame benchmark according to claim 9, which is characterized in that the modeling P value determination subelement is further included in unit, for determining the p value；The p value determination subelement includes the following steps during p value is determined：Section 0.5-3 by step-length 0.1 is split, obtains different p values；According to the different p value and the velocity field model, the speed interpolation of national periphery IGS websites is calculated；Calculate the velocity amplitude of the IGS websites that the speed interpolation of the IGS websites and ITRF are announced squared difference and open Side value Δ d, i.e.,：Wherein, Δ X, Δ Y, Δ Z are that the speed of the IGS websites is inserted The velocity amplitude of the IGS websites that value and ITRF are announced is in the difference of three change in coordinate axis direction；It calculates and meetsWhen p value, wherein, m is the quantity of national periphery IGS websites.
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| CN110001712A (en) * | 2019-05-08 | 2019-07-12 | 中铁第一勘察设计院集团有限公司 | Existing Railway Line based on satellite navigation and positioning base station net controls measuring system |
| RU2776698C1 (en) * | 2021-07-30 | 2022-07-25 | Федеральное Государственное Казенное Военное Образовательное Учреждение Высшего Образования "Военный Учебно-Научный Центр Сухопутных Войск "Общевойсковая Ордена Жукова Академия Вооруженных Сил Российской Федерации" | Method for building a global space geodetic network applying the results of observations of spacecraft of satellite navigation systems |
| CN116859421A (en) * | 2023-06-27 | 2023-10-10 | 国汽大有时空科技(安庆)有限公司 | Positioning service method and device for multiple reference frames |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110001712A (en) * | 2019-05-08 | 2019-07-12 | 中铁第一勘察设计院集团有限公司 | Existing Railway Line based on satellite navigation and positioning base station net controls measuring system |
| RU2776698C1 (en) * | 2021-07-30 | 2022-07-25 | Федеральное Государственное Казенное Военное Образовательное Учреждение Высшего Образования "Военный Учебно-Научный Центр Сухопутных Войск "Общевойсковая Ордена Жукова Академия Вооруженных Сил Российской Федерации" | Method for building a global space geodetic network applying the results of observations of spacecraft of satellite navigation systems |
| CN116859421A (en) * | 2023-06-27 | 2023-10-10 | 国汽大有时空科技(安庆)有限公司 | Positioning service method and device for multiple reference frames |
| CN116859421B (en) * | 2023-06-27 | 2024-03-15 | 国汽大有时空科技(安庆)有限公司 | Positioning service method and device for multiple reference frames |
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