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 PDF

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Publication number
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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data
base station
satellite
time series
raising
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CN201710345784.5A
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CN107167823B (en
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陈东
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Qianxun Position Network Co Ltd
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Qianxun Position Network Co Ltd
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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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  • Engineering & Computer Science (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Remote Sensing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • 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

A kind of method of the raising GNSS base station qualities of data
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.
CN201710345784.5A 2017-05-16 2017-05-16 A method of improving the GNSS base station quality of data Active CN107167823B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
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 observation quantity of satellite
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

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US6329945B1 (en) * 2000-04-20 2001-12-11 Novatel, Inc. System for improved GPS accuracy using a sky map
CN103901440A (en) * 2014-03-14 2014-07-02 中国测绘科学研究院 GNSS data signal quality monitor method
CN105929411A (en) * 2016-04-21 2016-09-07 上海司南卫星导航技术股份有限公司 GNSS receiver, quality analysis device and quality analysis method

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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 observation quantity of satellite
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 GNSS-IR-based earth surface soil humidity multi-star combination inversion method

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