CN110297259A - Base station net positioning enhancement information availability monitoring method and system based on grid - Google Patents
Base station net positioning enhancement information availability monitoring method and system based on grid Download PDFInfo
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- 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
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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Abstract
The present invention discloses a kind of base station net positioning enhancement information availability monitoring method based on grid, comprising: pressing longitude and latitude for known base station net overlay area equidistant partition is grid, and obtains the three-dimensional coordinate of each grid points；Corresponding virtual GGA information, which is generated, according to the three-dimensional coordinate of each grid points and is uploaded to data processing centre's request generates each grid points dummy observation；Detection of Cycle-slip is carried out to the dummy observation that data processing centre returns and pseudorange One-Point Location resolves, implements observation abnormality detection, and judge the actually available satellite number of each grid points；In conjunction with the coordinate of base station net comprehensive broadcast ephemeris and grid points, the theoretical usable satellite number of each grid points is calculated；And then the utilization rate of satellite at each grid points in overlay area is netted at calculating benchmark station.The present invention realizes the uniform monitoring of base station net overlay area positioning enhancement information from user perspective, thus reliability system that is abundant and improving high-precision enhancing positioning.
Description
Technical field
The present invention relates to the availability monitoring technology of base station net enhancing positioning more particularly to a kind of bases based on grid
Quasi- station net positioning enhancement information availability monitoring method, belongs to GNSS (Global Navigation Satellite System)
Positioning and field of navigation technology.
Background technique
GNSS continuous operation base station net (referred to as " GNSS base station net "), is uniformly distributed by several within the scope of region
Base station composition, round-the-clock real-time reception satellite navigation data, and pass through atmosphere etc. between Baselines computer installation between base station
Correction of Errors, and then position error modeling is carried out to entire overlay area.Thereafter computer, data communication and internet skill are utilized
The network of art composition provides positioning enhancement information to the user of different type, different demands, different levels in real time, extensively
Applied to urban planning, land mapping, cadastral survey manual, town and country construction, environmental monitoring, prevent and reduce natural disasters, the fields such as traffic monitoring, with
Meet all kinds of different industries to high-precision, quickly, in real time positioning and navigation needs.Since informationized society takes high precision position
The great demand of business, GNSS base station net have become the great infrastructure of modern space position reference and accurate navigator fix.
The high accuracy positioning service covering every profession and trade application and government decision that GNSS base station net provides, wherein mapping,
The fields such as nationality, aviation have mandatory requirement to the safety of service, reliability, and completeness is even more important than precision.It is complete
Property monitoring system be it is a set of can reflect in real time continuous operation base station system operation health status integrated service system, when
GNSS base station net system occurs abnormal or when cannot provide user and need to service, and mentions within the predetermined time to user
For timely and effectively warning message (i.e. reliability index).System integrity monitoring is related to the safety in utilization of user, is whole
Important component in a base station net system.
Existing GNSS base station net integrity monitoring system is primarily present two Main ways: first is that observing for base station
The quality of data controls, and mainly includes satellite health status monitoring, base station observation availability of data (including signal-to-noise ratio, data
Delay, cycle slip ratio, multipath etc.)；Second is that by the way of sparse monitoring station, to region by way of laying a small amount of monitoring station
The modeling of the room atmospheres error such as ionosphere and troposphere carries out integrity monitoring.Due to a small amount of monitoring station be difficult to effectively cover it is whole
A base station web area, therefore, it is difficult to reflect the overall space availability of base station net system from user perspective.
Summary of the invention
It is difficult to reflect base station net overall space availability from user perspective not for existing completeness monitoring method
Foot, the present invention provide a kind of base station net positioning enhancement information availability monitoring method based on grid, pass through grid points week
The calculating for jumping detection, One-Point Location and satellite utilization rate realizes base station net overlay area positioning enhancing letter from user perspective
The uniform monitoring of breath, thus reliability system that is abundant and improving high-precision enhancing positioning.
Technical scheme is as follows:
A kind of scheme one: base station net positioning enhancement information availability monitoring method based on grid, comprising:
By known base station net overlay area equidistant partition it is grid by longitude and latitude, and obtains the three-dimensional of each grid points and sit
Mark；
Corresponding virtual GGA information is generated according to the three-dimensional coordinate of each grid points, and the GGA information is uploaded into data
Processing center request generates each grid points dummy observation；
The dummy observation that data processing centre returns is received, the dummy observation includes that the carrier wave as unit of week is seen
Measured value and the Pseudo-range Observations as unit of rice；
The carrier observations are examined by carrier cycle slip detection, is resolved by pseudorange One-Point Location and the pseudorange is examined to see
Measured value obtains the actually available satellite number of each grid points according to the inspection result of the carrier observations and Pseudo-range Observations；
In conjunction with the coordinate of base station net comprehensive broadcast ephemeris and grid points, the theoretical usable satellite of each grid points is calculated
Number；
According to the actually available satellite of each grid points and theoretical usable satellite number, each lattice in overlay area are netted at calculating benchmark station
The utilization rate of satellite at site.
As a preferred embodiment, each grid points coordinate can obtain as the following formula:
In formula, B(i,j)、L(i,j)And H(i,j)Respectively indicate latitude, the longitude and altitude of grid points (i, j)；BmaxAnd BminPoint
Not Biao Shi base station net overlay area maximum latitude and minimum latitude；LmaxAnd LminRespectively indicate base station net overlay area
Maximum longitude and minimum longitude；M and n respectively indicates the division number by latitude and longitude；HuIndicate the height of u-th of base station, U
Indicate the quantity of base station in base station net.
As a preferred embodiment, the general generation format of the GGA information are as follows:
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*xx<CR><
LF>；
Wherein, data segment 2-5 is the latitude and longitude information of grid points；Data segment 9 is the elevation information of grid points；Data segment 6
For alignment quality mark, it is set as 1, i.e., non-differential witness marker.
As a preferred embodiment, the expression formula for the dummy observation that data processing centre returns is as follows:
In formula,Indicate the carrier observations as unit of week；P indicates the Pseudo-range Observations as unit of rice；Subscript r and
S respectively indicates reference satellite and non-reference satellite；Subscript V indicates grid points, and subscript A indicates the primary standard station in base station net；λ
Indicate carrier wavelength；Indicate primary standard station and grid points to the difference of the geometric distance of same satellite,To pass through base
Double difference Correction of Errors between the quasi- station net primary standard station modeled and grid points.
As a preferred embodiment, the carrier observations are examined by carrier cycle slip detection, specifically included:
Carry out Detection of Cycle-slip is combined using combining without geometrical combination and MW for difference between epoch:
Wherein, between epoch difference without geometry combination observation amount Δ LGF(t1,t2) are as follows:
ΔLGF(t1,t2)=Δ φ1(t1,t2)-Δφ2(t1,t2) (3)
Wherein, between epoch difference MW combination observation amount Δ LMW(t1,t2) are as follows:
In formula, Δ indicates t1And t2Calculus of differences symbol between two epoch, φ1And φ2Respectively indicate f1And f2Two frequencies
Carrier observations in rate as unit of distance, P1And P2Respectively indicate f1And f2Pseudo-range Observations in two frequencies；
As Δ LGF(t1,t2) be greater than preset threshold values A when, alternatively, Δ LMW(t1,t2) it is greater than preset threshold values B
When, that is, think to be judged as that the dummy observation is exception there are cycle slip, it is unavailable；
It is resolved by pseudorange One-Point Location and examines the Pseudo-range Observations, specifically included:
The check system that the pseudorange One-Point Location resolves is as follows:
In formula,It is the correction matrix number of coordinate after the coordinate of given grid points for parameter to be estimated, B is and satellite
It is distributed relevant design matrix, L is the corresponding observing matrix of each satellite, and P is observation weight matrix relevant to elevation angle；
When correction matrix numberEach component absolute value be not less than threshold values C when, it is believed that the Pseudo-range Observations of each satellite are different
Often, unavailable；
The actually available satellite number of each grid points is obtained according to the inspection result of the carrier observations and Pseudo-range Observations,
It specifically includes: when carrier observations and Pseudo-range Observations without exception, judging that the dummy observation of each grid points is without exception, into
And obtain the actually available satellite number of each grid points.
As a preferred embodiment, the threshold value A is set as 0.1 λ1, the threshold value B is set as 10 λWL；Wherein,Indicate f1The corresponding wavelength of frequency；Indicate wide lane wavelength；C is the light velocity；
The threshold values C is 15m.
As a preferred embodiment, in conjunction with the coordinate of base station net comprehensive broadcast ephemeris and grid points, each grid is calculated
The theoretically usable satellite number of point, specifically includes:
Based on grid points coordinate and comprehensive broadcast ephemeris, elevation angle of each satellite in grid points is calculated；
In conjunction with the healthy flag data for including in broadcast ephemeris, according to pre-set comprehensive descision standard, computational theory
On usable satellite number；The judgment criteria are as follows: when the healthy flag bit is that healthy and elevation of satellite meets elevation
When corner condition, as theoretic usable satellite.
As a preferred embodiment, the calculation formula of the utilization rate p is as follows:
In formula, nrecIndicate the actually available satellite number of grid points, ntheIndicate the theoretical usable satellite number of grid points.
Scheme two: a kind of grid dot data processing device, including processor and memory, the memory are stored with grid
Point data processing routine, described program method described in one any one of implementation when being run by processor.
Scheme three: a kind of base station net positioning enhancement information availability monitoring system based on grid, including grid points
Data processing equipment and data processing centre with its data communication；The grid dot data processing device includes processor and deposits
Reservoir, the memory are stored with grid points data processor, and described program implementation one when being run by processor is appointed
Method described in meaning one；The data processing centre is used to generating the GGA information into the corresponding virtual observation of each grid points
Value.
The beneficial effect comprise that
Base station net proposed by the present invention based on grid positions enhancement information availability monitoring method, positions from user
Angle is set out, and is divided by uniform grid points, and each grid points implement Detection of Cycle-slip, One-Point Location calculates, realizing enhances letter
Breath is with the presence or absence of abnormal judgement；On this basis according to the coordinate of base station net comprehensive broadcast ephemeris and grid points, calculate
Theoretical usable satellite at each grid points, then the monitoring for realizing satellite utilization rate is compared with dummy observation Satellite.
Grid monitoring method proposed by the present invention, it is contemplated that all possible user location in base station net overlay area,
It is divided by uniform grid points, is utilized in observation quality and satellite of each grid points to enhancement information (dummy observation)
Rate is calculated, and can be realized the uniform monitoring of base station net overlay area basic fixed position enhancement information, is effectively improved few at present
Amount monitoring station method is difficult to the deficiency of effecting reaction overall region, realizes the entirety from user perspective reflection base station net system
Space availability.
Detailed description of the invention
Fig. 1 is the design framework figure of base station net positioning enhancement information availability monitoring method described in embodiment 1；
Fig. 2 is the implementation flow chart of base station net positioning enhancement information availability monitoring method described in embodiment 1.
Specific embodiment
Referring to figs. 1 and 2, it is available to disclose a kind of base station net positioning enhancement information based on grid for embodiment 1
Property monitoring method, the specific steps are as follows:
Known base station net overlay area equidistant partition is grid by longitude and latitude by step (1).
Dividing obtained each grid points (can be considered virtual reference station) coordinate can obtain as the following formula:
In formula, B(i,j)、L(i,j)And H(i,j)Respectively indicate latitude, the longitude and altitude of grid points (i, j)；BmaxAnd BminPoint
Not Biao Shi base station net overlay area maximum latitude and minimum latitude；LmaxAnd LminRespectively indicate base station net overlay area
Maximum longitude and minimum longitude；M and n respectively indicates the division number by latitude and longitude；HuIndicate the height of u-th of base station, U
Indicate the quantity of base station in base station net.
Step (2), according to grid points three-dimensional coordinate (B(i,j),L(i,j),Have), generate virtual geographical fix information
(Geographical Fix Information, abbreviation GGA information), and data processing centre is uploaded, request generates virtual see
Measured value.
The general generation format of GGA information are as follows:
$GPGGA,<1>,<2>,<3>,<4>,<5>,<6>,<7>,<8>,<9>,M,<10>,M,<11>,<12>*xx<CR><
LF>
Wherein, data segment 2-5 is the latitude and longitude information of grid points；Data segment 9 is the elevation information of grid points；Data segment 6
For alignment quality mark, in the present invention, since grid points do not do difference, it is directly disposed as 1, i.e., non-differential witness marker；
Other data segments assignment according to the actual situation.It should be noted that the corresponding positioning of obtained dummy observation i.e. grid points increases
Strong information.
Step (3), data processing centre generate dummy observation.
The virtual GGA information that data processing centre generates according to grid points, generates the dummy observation of each grid points.Virtually
Observation generally includes the carrier observations as unit of week and the Pseudo-range Observations as unit of rice.It is logical to generate dummy observation
Following formula is crossed to be indicated:
In formula,Indicate the carrier observations as unit of week；P indicates the Pseudo-range Observations as unit of rice；Subscript r and
S respectively indicates reference satellite and non-reference satellite；Subscript V indicates grid points, and subscript A indicates the base station that base station net is included
Primary standard station in network element, base station generally nearest from subscriber station；λ indicates carrier wavelength；Indicate primary standard station and
Grid points to the difference of the geometric distance of same satellite,For the primary standard station that is modeled by base station net and grid points it
Between double difference Correction of Errors.
Step (4) receives the dummy observation that data processing centre returns, and carries out the resolving of pseudorange One-Point Location and carrier cycle
Detection is jumped, realizes and the exception of dummy observation is judged.
Grid points receive the dummy observation that data processing centre sends, and are resolved and are examined by Detection of Cycle-slip and One-Point Location
Its availability.In view of the sampling interval of dummy observation is generally 1s, therefore, Detection of Cycle-slip use epoch between difference it is very few
What combination and MW combine the exploration policy combined, specific as follows:
Difference without geometry combination observation amount Δ L between epochGF(t1,t2) are as follows:
ΔLGF(t1,t2)=Δ φ1(t1,t2)-Δφ2(t1,t2) (3)
The MW combination observation amount Δ L of difference between epochMW(t1,t2) are as follows:
In formula, Δ indicates t1And t2Calculus of differences symbol between two epoch, φ1And φ2Respectively indicate f1And f2Two frequencies
Carrier observations in rate as unit of distance, P1And P2Respectively indicate f1And f2Pseudo-range Observations in two frequencies.
It, herein can be by Δ L in view of the sampling interval of dummy observation is 1sGF(t1,t2) threshold value is set as 0.1 week correspondence
Distance, Δ LMW(t1,t2) be set as 10 weeks corresponding distances, i.e., as Δ LGF(t1,t2)≥0.1λ1With Δ LMW(t1,t2)≥10
λWLWhen any one meets, that is, think to be judged as that the dummy observation is exception there are cycle slip, it is unavailable；Wherein,
Indicate f1The corresponding wavelength of frequency；Indicate wide lane wavelength, c is the light velocity.
When determining that cycle slip is not present in carrier observations, examined using quality of the pseudorange One-Point Location to Pseudo-range Observations
It is as follows to veritify mode for core:
In formula,It is the correction matrix number of coordinate after the coordinate of given grid points for parameter to be estimated, B is and satellite
It is distributed relevant design matrix, L is the corresponding observing matrix of each satellite, and P is observation weight matrix relevant to elevation angle.When changing
Positive matrix numberThe absolute value of each component when being respectively less than 15m, it is believed that there is no abnormal for the Pseudo-range Observations of each satellite.
It should be noted that the checkout sequence that above-mentioned Detection of Cycle-slip and One-Point Location resolve has no strict demand, cycle slip is visited
The carrier observations as unit of week examined are surveyed with the presence or absence of exception, One-Point Location, which resolves, examines the pseudorange as unit of rice to see
Measured value is with the presence or absence of exception, and finally whether the corresponding dummy observation of each grid points with needs while can meet two kinds of inspection results
It is without exception.
Through the above steps, the abnormal judgement to carrier wave and pseudorange dummy observation is realized, is determining carrier wave and pseudorange
In the case that dummy observation is without exception, final available dummy observation is obtained, can accordingly be obtained, Pseudo-range Observations are without exception
And the satellite of cycle slip, i.e., the actually available satellite of each grid points is not present.
Step (5), usable satellite number in computational theory, and carried out pair with the actually available number of satellite in dummy observation
Than, and then obtain the utilization rate of satellite at each grid points in base station net.
According to the comprehensive broadcast ephemeris of base station net, in conjunction with the coordinate of grid points, usable satellite in computational theory.Specifically
, using grid points coordinate and comprehensive broadcast ephemeris (unions of all received broadcast ephemeris of base station), calculate each satellite
Elevation angle in grid points carries out comprehensive descision in conjunction with the healthy flag data for including in broadcast ephemeris, in computational theory
Usable satellite number.
Wherein, judge theoretically available standard are as follows: when the satellite altitude that flag bit healthy in ephemeris is health and calculating
When angle meets elevation corner condition (generally 10 degree), that is, treat as theoretic usable satellite.
Wherein, the formula for calculating elevation angle E of each satellite in grid points is as follows:
In formula,WithSatellite is respectively indicated using each grid points as the east in the coordinate system of the northeast of origin day
To, the coordinate of north orientation and vertical direction.
Finally, the virtual observation that the grid points that the theoretical usable satellite number being calculated and step (4) obtain are received
Actually available number of satellite compares in value, obtains the utilization rate p of satellite:
In formula, nrecIndicate the actually available satellite number of grid points, ntheIndicate the theoretical usable satellite number of grid points.
Correspondingly, embodiment 2 discloses a kind of base station net positioning enhancement information availability monitoring system based on grid,
It includes grid dot data processing device and the data processing centre with its data communication.Grid dot data processing device includes place
Reason device and memory, memory are stored with grid points data processor, which executes embodiment when being run by processor
The step of described in 1 (1)~(2) and step (4)~(5) corresponding instruction；Data processing centre is then used to complete step (3).
Finally, it should be noted that although embodiment of the present invention is described in conjunction with attached drawing above, this hair
Bright to be not limited to above-mentioned specific embodiments and applications field, above-mentioned specific embodiment is only schematically, refers to
The property led, rather than it is restrictive.Those skilled in the art under the enlightenment of this specification, are not departing from power of the present invention
In the case that benefit requires protected range, a variety of forms can also be made, these belong to the column of protection of the invention.
Claims (10)
1. a kind of base station net based on grid positions enhancement information availability monitoring method characterized by comprising
By known base station net overlay area equidistant partition it is grid by longitude and latitude, and obtains the three-dimensional coordinate of each grid points；
Corresponding virtual GGA information is generated according to the three-dimensional coordinate of each grid points, and the GGA information is uploaded into data processing
Center requests generate each grid points dummy observation；
The dummy observation that data processing centre returns is received, the dummy observation includes the carrier observations as unit of week
With the Pseudo-range Observations as unit of rice；
The carrier observations are examined by carrier cycle slip detection, is resolved by pseudorange One-Point Location and examines the pseudorange observation
Value, obtains the actually available satellite number of each grid points according to the inspection result of the carrier observations and Pseudo-range Observations；
In conjunction with the coordinate of base station net comprehensive broadcast ephemeris and grid points, the theoretical usable satellite number of each grid points is calculated；
According to the actually available satellite of each grid points and theoretical usable satellite number, each grid points in overlay area are netted at calculating benchmark station
Locate the utilization rate of satellite.
2. the base station net enhancement information availability monitoring method based on grid as described in claim 1, which is characterized in that
Each grid points coordinate can obtain as the following formula:
In formula, B(i,j)、L(i,j)And H(i,j)Respectively indicate latitude, the longitude and altitude of grid points (i, j)；BmaxAnd BminTable respectively
Show the maximum latitude and minimum latitude of base station net overlay area；LmaxAnd LminRespectively indicate the maximum of base station net overlay area
Longitude and minimum longitude；M and n respectively indicates the division number by latitude and longitude；HuIndicate the height of u-th of base station, U is indicated
The quantity of base station in base station net.
3. the base station net enhancement information availability monitoring method based on grid as claimed in claim 2, which is characterized in that
The general generation format of the GGA information are as follows:
Wherein, data segment 2-5 is the latitude and longitude information of grid points；Data segment 9 is the elevation information of grid points；Data segment 6 is fixed
Position quality mark, is set as 1, i.e., non-differential witness marker.
4. the base station net enhancement information availability monitoring method based on grid as described in claim 1, which is characterized in that
The expression formula for the dummy observation that data processing centre returns is as follows:
In formula,Indicate the carrier observations as unit of week；P indicates the Pseudo-range Observations as unit of rice；Subscript r and s difference
Indicate reference satellite and non-reference satellite；Subscript V indicates grid points, and subscript A indicates the primary standard station in base station net；λ is indicated
Carrier wavelength；Indicate primary standard station and grid points to the difference of the geometric distance of same satellite,To pass through base station
Double difference Correction of Errors between the net primary standard station modeled and grid points.
5. the base station net enhancement information availability monitoring method based on grid as claimed in claim 4, which is characterized in that
The carrier observations are examined by carrier cycle slip detection, are specifically included:
Carry out Detection of Cycle-slip is combined using combining without geometrical combination and MW for difference between epoch:
Wherein, between epoch difference without geometry combination observation amount Δ LGF(t1,t2) are as follows:
ΔLGF(t1,t2)=Δ φ1(t1,t2)-Δφ2(t1,t2) (3)
Wherein, between epoch difference MW combination observation amount Δ LMW(t1,t2) are as follows:
In formula, Δ indicates t1And t2Calculus of differences symbol between two epoch, φ1And φ2Respectively indicate f1And f2In two frequencies
Carrier observations as unit of distance, P1And P2Respectively indicate f1And f2Pseudo-range Observations in two frequencies；
As Δ LGF(t1,t2) be greater than preset threshold values A when, alternatively, Δ LMW(t1,t2) be greater than preset threshold values B when,
Think to be judged as that the dummy observation is exception there are cycle slip, it is unavailable；
It is resolved by pseudorange One-Point Location and examines the Pseudo-range Observations, specifically included:
The check system that the pseudorange One-Point Location resolves is as follows:
In formula,It is the correction matrix number of coordinate after the coordinate of given grid points for parameter to be estimated, B is and satellite distribution
Relevant design matrix, L are the corresponding observing matrix of each satellite, and P is observation weight matrix relevant to elevation angle；
When correction matrix numberThe absolute value of each component when being not less than threshold values C, it is believed that the Pseudo-range Observations of each satellite are abnormal, no
It can use；
The actually available satellite number of each grid points is obtained according to the inspection result of the carrier observations and Pseudo-range Observations, specifically
It include: to judge that the dummy observation of each grid points is without exception when carrier observations and Pseudo-range Observations without exception, and then obtain
To the actually available satellite number of each grid points.
6. the base station net enhancement information availability monitoring method based on grid as claimed in claim 5, which is characterized in that
The threshold value A is set as 0.1 λ1, the threshold value B is set as 10 λWL；Wherein,Indicate f1The corresponding wavelength of frequency；Indicate wide lane wavelength；C is the light velocity；
The threshold values C is 15m.
7. the base station net enhancement information availability monitoring method based on grid as described in claim 1, which is characterized in that
In conjunction with the coordinate of base station net comprehensive broadcast ephemeris and grid points, the theoretically usable satellite number of each grid points is calculated, specifically
Include:
Based on grid points coordinate and comprehensive broadcast ephemeris, elevation angle of each satellite in grid points is calculated；
In conjunction with the healthy flag data for including in broadcast ephemeris, according to pre-set comprehensive descision standard, in computational theory
Usable satellite number；The judgment criteria are as follows: when the healthy flag bit is that healthy and elevation of satellite meets elevation angle bead
When part, as theoretic usable satellite.
8. the base station net enhancement information availability monitoring method based on grid as described in claim 1, which is characterized in that
The calculation formula of the utilization rate p is as follows:
In formula, nrecIndicate the actually available satellite number of grid points, ntheIndicate the theoretical usable satellite number of grid points.
9. a kind of grid dot data processing device, which is characterized in that including processor and memory, the memory is stored with lattice
Dot data processing routine, described program by processor when being run for realizing as described in claim 1 to 8 any one
Method.
10. a kind of base station net positioning enhancement information availability based on grid monitors system, which is characterized in that including grid
Dot data processing device and data processing centre with its data communication；The grid dot data processing device include processor and
Memory, the memory are stored with grid points data processor, and described program realizes such as right when being run by processor
It is required that method described in 1 to 8 any one；The data processing centre is used to the GGA information generating each grid points corresponding
Dummy observation.
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| CN110879403A (en) * | 2019-10-29 | 2020-03-13 | 中海北斗(深圳)导航技术有限公司 | Simple and feasible monitoring method and system for satellite-based augmentation system |
| CN110954931A (en) * | 2019-12-17 | 2020-04-03 | 国家基础地理信息中心 | Positioning method, positioning device and computer readable storage medium |
| CN111708061A (en) * | 2020-06-04 | 2020-09-25 | 东南大学 | Multi-reference-station differential positioning information generation method based on dynamic grid |
| CN111856513A (en) * | 2020-07-31 | 2020-10-30 | 中国南方电网有限责任公司 | Satellite observation value acquisition method and device, computer equipment and storage medium |
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