CN107167823A - A kind of method of the raising GNSS base station qualities of data - Google Patents
A kind of method of the raising GNSS base station qualities of data Download PDFInfo
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- CN107167823A CN107167823A CN201710345784.5A CN201710345784A CN107167823A CN 107167823 A CN107167823 A CN 107167823A CN 201710345784 A CN201710345784 A CN 201710345784A CN 107167823 A CN107167823 A CN 107167823A
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- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000004458 analytical method Methods 0.000 claims abstract description 13
- 238000001914 filtration Methods 0.000 claims abstract description 8
- 238000007405 data analysis Methods 0.000 claims abstract description 4
- 230000000694 effects Effects 0.000 claims description 10
- 235000007164 Oryza sativa Nutrition 0.000 claims description 4
- 235000009566 rice Nutrition 0.000 claims description 4
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- 238000012423 maintenance Methods 0.000 abstract description 2
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- 238000012360 testing method Methods 0.000 description 1
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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
- G01S19/01—Satellite radio beacon positioning systems transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
- G01S19/13—Receivers
- G01S19/24—Acquisition or tracking or demodulation of signals transmitted by the system
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- Position Fixing By Use Of Radio Waves (AREA)
Abstract
The present invention relates to a kind of method of the raising GNSS base station qualities of data, comprise the following steps：Base station observes Data Quality Analysis, and Data Quality Analysis result graphical representation does signal filtration zone based on graphics data analysis result and divided, delimit the useful space scope that satellite data is received, observation data are expected in output.Accurate orientation angle and the elevation angle of data interference source are accurately positioned, while shielding interference signal, more moonscope information is remained, divides the effective coverage of data receiver, environment intervention is done to field maintenance person exactly and instructs.
Description
Technical field
Quality of data method, more particularly to a kind of side of the raising GNSS base station qualities of data are improved the present invention relates to one kind
Method.
Background technology
GPS (Global Navigation Satellite System, be abbreviated as GNSS) is a kind of
Aerospace Satellite radio distance-measuring alignment system, is evenly distributed on the satellite in different orbital planes, by sending modulation wave signal, warp
Cross atmosphere to relay to receiver user, positioning function is realized for demodulation navigator fix signal.GPS wide area differential GPS GNSS and region
The receiver that GNSS grounds increase system is used, is referred to as reference receiver.The reference receiver is designed according to user to be grown
Phase set up in the wild, according to user set by elevation angle, sample frequency, round-the-clock long-term acquisition satellite data, and in real time
Return control centre.
Each orbital plane is operated in because satellite is uniformly distributed, reference receiver is distributed in different longitude and latitude, the two composition
Different height angles of cut-off.Theoretically, receiver tracking low clearance cornerdown star, geometric dilution of precision is stronger, unnecessary to see
Measured value is more, and positioning precision is higher (influence of elevation location precision is obvious).But actually low clearance cornerdown star is propagated flow and prolonged
Chi Yue great, multipath effect is stronger, and excessive noise signal is introduced again, is unfavorable for the raising of measurement accuracy.Reference receiver
Block and be generally from different orientation (depending on site environment), comprehensive, the overall method for improving elevation mask can be filtered effectively
The noise signal caused by environment, but also shielded simultaneously to not blocking azimuthal signal, it is " excellent in this direction
Matter " signal has carried out " mistake " rejecting, reduces satellite number, reduces satellite geometry dilution of precision, reduce redundant observation
Value, reduces measurement accuracy (influence of elevation RMS value is obvious).The good satellite-signal in other orientation is also filtered out simultaneously, is defended
A star tracking number is not up to most, and satellite geometry dilution of precision is not up to most by force, and excess observation is not up at most, measurement accuracy
It is not up to theoretical optimal.
The content of the invention
In view of the above-mentioned problems, the present invention proposes a kind of method of the raising GNSS base station qualities of data, comprise the following steps：
Base station observes Data Quality Analysis：Based on the epoch of single every satellite, percentage of head rice time series, multipath are resolved
Time series and cycle slip time series；Resolve elevation angle, the azimuth time series of every satellite；
Data Quality Analysis result graphical representation：Topocentric coordinate system figure is drawn, will be described complete based on the time series
Whole rate, the multipath effect and the cycle slip information superposition are in the topocentric coordinate system；
Based on graphics data analysis result, the division of signal filtration zone is done, the useful space that satellite data is received delimited
Scope；
Observation data are expected in output.
Topocentric coordinate system figure is drawn, is using the heart of standing as origin of coordinates O, respectively to stand deflection and elevation angle respectively constitutes station
Two key elements of heart coordinate.
The beneficial effect that technical solution of the present invention is realized：
The present invention is by the judgement to data filtering and accepts or rejects method, can be accurately positioned the accurate orientation angle of data interference source
And elevation angle, while shielding interference signal, remain more moonscope information；The effective coverage of data receiver is divided,
The satellite-signal of screening mass difference, does environment intervention to field maintenance person exactly and instructs.
Brief description of the drawings
Fig. 1 is a kind of flow chart of the method for the raising GNSS base station qualities of data of the present invention.
Fig. 2 is the topocentric coordinate system figure of the present invention.
Fig. 3 is the topocentric coordinate system figure after overlapped information of the present invention.
Fig. 4 is useful space range effect figure of the present invention.
Embodiment
Below in conjunction with the accompanying drawings and specific embodiment, the present invention is expanded on further, the embodiment of the present invention is only to illustrate this hair
The protection domain that bright technical scheme is not intended to limit the present invention.
As shown in figure 1, the present invention proposes a kind of method of the raising GNSS base station qualities of data, comprise the following steps：
Base station observes Data Quality Analysis：Based on the epoch of single every satellite, percentage of head rice time series, multipath are resolved
Time series and cycle slip time series；Resolve elevation angle, the azimuth time series of every satellite；
Data Quality Analysis result graphical representation：Topocentric coordinate system figure is drawn, will be described complete based on the time series
Whole rate, the multipath effect and the cycle slip information superposition are in the topocentric coordinate system；
Based on graphics data analysis result, the division of signal filtration zone is done, the useful space that satellite data is received delimited
Scope；
Observation data are expected in output.
Topocentric coordinate system figure is drawn, is using the heart of standing as origin of coordinates O, respectively to stand deflection and elevation angle respectively constitutes station
Two key elements of heart coordinate.
Below in conjunction with accompanying drawing, specific embodiment mode is further elaborated：
1st, base station observation Data Quality Analysis
A) data integrity rate time series
For minimum types value in the data type of each satellite and maximum types value percentage.Generally, receiver
The observation Value Types such as carrier wave and pseudorange from different frequency, after the observation of all epoch is traveled through, Ke Yitong can be received
Carrier wave and Pseudo-range Observations in each frequency of meter single satellite, in the ideal case, carrier wave and pseudorange observation in each frequency
Value should be identical, but actually due to navigation signal in itself etc. design reasons can cause signal on some frequencies easily tracking and have
It is easily lost.Formula is as follows：
I.e.：
B) multipath time series
GNSS receiver receives the direct signal from satellite launch, while can also receive same signal received machine week
Enclose the reflection of object and produce the signal reflected in multiple paths, the GNSS signal that actual amount is measured will be directly received
Signal and the superposition result of signal that reflects, this phenomenon is multipath effect.Using formula analysis, with BDS B1 and
Exemplified by B2：
For B1 frequencies：
For B2 frequencies：
Wherein, MP1, MP2 are respectively B1 and B2 frequency multipaths
P1, P2, B1, B2, F1, F2Respectively pseudorange, carrier observations and corresponding frequency.
C) cycle slip compares time series
In the carrier phase observation process of satellite fix, due to the jump that complete cycle is counted caused by the losing lock of satellite-signal
Become or interrupt.We can be to " bulk registration observation/accumulative generation cycle slip observation " this ratio (cycle slip in test process
Than) tested, it is as follows using formula：
GF=[Cs(L1×λL1-L2×λL2)]
GF (i)-GF (i-1) ＞ threshold (0.1 meter), slip=1；
D) deflection, elevation angle time series
Probability calculating coordinate based on navigation ephemeris and base station station.
2nd, Data Quality Analysis result graphical representation (topocentric coordinate system)
1) topocentric coordinate system figure, such as Fig. 2 are drawn：Using the heart of standing as origin of coordinates O, respectively with deflection and the elevation angle difference of standing
Constitute two key elements of topocentric coordinates；
2) time series is based on, by percentage of head rice, multipath effect and cycle slip information superposition in above-mentioned topocentric coordinate system, wherein
Represent data integrity rate with satellite trajectory, the chromatogram of track represent multipath effect value (L1 multipath effect recommendations ＜ 0.5,
L2 multipath effect recommendations ＜ 0.65), on track × symbol represents cycle slip number (cycle slip than recommendation ＞ 400).Example
Design sketch such as Fig. 3.
3rd, signal filtration zone is divided
1) according to code requirement, setting height angle of cut-off shields data receiver space on full azimuth, such as：10 degree, i.e., 10
Satellite data below spending is that invalid receiver machine is interval.
2) on the basis of the height angle of cut-off of setting, self-defined azimuth and elevation angle shielding data receiver space are picked
Except the second-rate interval of data.The website off quality to data, it is comprehensive according to the graphical result of above-mentioned Data Quality Analysis
Data integrity rate (there is interruption track in figure) is closed, multipath value too big (chromatogram is deep, MP1 ＞ 0.5MP2 ＞ 0.65) and cycle slip are more
Whether the area filter of (it is relative that "×" meets mark), filtering post analysis data meet requirement, otherwise, reselect filtering area
Domain, until meeting the requirements.
3) it is final to delimit the useful space scope that satellite data is received 2 points based on more than.
Show that figure delimit the useful space scope that satellite data is received, design sketch such as Fig. 4 based on graphical vector.
4th, observation data are expected in output, complete operation.
Claims (2)
1. a kind of method of the raising GNSS base station qualities of data, it is characterised in that comprise the following steps：
Base station observes Data Quality Analysis：Based on the epoch of single every satellite, percentage of head rice time series, multipath time are resolved
Sequence and cycle slip time series；Resolve elevation angle, the azimuth time series of every satellite；
Data Quality Analysis result graphical representation：Topocentric coordinate system figure is drawn, will be described complete based on the time series
Rate, the multipath effect and the cycle slip information superposition are in the topocentric coordinate system；
Based on graphics data analysis result, the division of signal filtration zone is done, the useful space scope that satellite data is received delimited；
Observation data are expected in output.
2. the method for the raising GNSS base station qualities of data according to claim 1, it is characterised in that the drafting station heart
Coordinate system figure, be using the heart of standing as origin of coordinates O, respectively with stand deflection and elevation angle respectively constitute two of topocentric coordinates will
Element.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108959208A (en) * | 2018-06-29 | 2018-12-07 | 广东星舆科技有限公司 | The method that the station Analysis for CO RS receives satellite data quality |
| CN110632624A (en) * | 2018-06-25 | 2019-12-31 | 中移物联网有限公司 | Method, device, equipment, and storage medium for determining quality of satellite observation data |
| CN111142127A (en) * | 2018-11-02 | 2020-05-12 | 千寻位置网络有限公司 | Cycle slip detection method and device |
| CN112505068A (en) * | 2020-11-03 | 2021-03-16 | 桂林理工大学 | Surface soil humidity multi-satellite combined inversion method based on GNSS-IR |
| CN115932902A (en) * | 2021-08-27 | 2023-04-07 | 中移(上海)信息通信科技有限公司 | Method, device, system and mobile terminal for quality detection of satellite data |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110632624A (en) * | 2018-06-25 | 2019-12-31 | 中移物联网有限公司 | Method, device, equipment, and storage medium for determining quality of satellite observation data |
| CN108959208A (en) * | 2018-06-29 | 2018-12-07 | 广东星舆科技有限公司 | The method that the station Analysis for CO RS receives satellite data quality |
| CN111142127A (en) * | 2018-11-02 | 2020-05-12 | 千寻位置网络有限公司 | Cycle slip detection method and device |
| CN112505068A (en) * | 2020-11-03 | 2021-03-16 | 桂林理工大学 | Surface soil humidity multi-satellite combined inversion method based on GNSS-IR |
| CN112505068B (en) * | 2020-11-03 | 2023-08-11 | 桂林理工大学 | A multi-satellite combination retrieval method for surface soil moisture based on GNSS-IR |
| CN115932902A (en) * | 2021-08-27 | 2023-04-07 | 中移(上海)信息通信科技有限公司 | Method, device, system and mobile terminal for quality detection of satellite data |
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