CN106932799B - A kind of visible satellite based on position ambiguity determines method - Google Patents
A kind of visible satellite based on position ambiguity determines method Download PDFInfo
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- CN106932799B CN106932799B CN201710118910.3A CN201710118910A CN106932799B CN 106932799 B CN106932799 B CN 106932799B CN 201710118910 A CN201710118910 A CN 201710118910A CN 106932799 B CN106932799 B CN 106932799B
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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
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- Radar, Positioning & Navigation (AREA)
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- 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 visible satellites based on position ambiguity to determine method, comprising the following steps: obtains terminal location and position ambiguity；According to the position of acquisition and position ambiguity, satellite elevation mask is calculated according to formula；According to the terminal location of the satellite ephemeris of server storage and acquisition, elevation of satellite is calculated；Elevation of satellite is greater than the satellite elevation mask calculated, then the satellite is classified as visible satellite set, is otherwise classified as invisible satellite set；Terminate process.The present invention determines the general location and position ambiguity of terminal, reduces terminal location range according to the Cell information or WLAN information of physical connection, to fast and effeciently determine the visible satellite set of GNSS terminal.
Description
Technical field
The present invention relates to a kind of visible satellite set to determine that method more particularly to a kind of visible based on position ambiguity are defended
Star determines method.
Background technique
With mobile location service development and be related to demand of the fields such as life security to quick positioning and precise positioning,
In conjunction with GNSS precise positioning ability, met the tendency of by the AGNSS location technology that mobile communication network assisted GNSS terminal quickly positions
And it gives birth to.It solves the problems, such as that traditional GNSS positioning terminal signal capture is slow, power consumption is big, primary positioning time is long, possesses simultaneously
Positioning accuracy more higher than network location technology is widely applied in running fix field, and AGNSS server is general at present
Terminal visible satellite set is determined using following strategy:
If AGNSS server can get the general location of terminal, in conjunction with each satellite ephemeris directly according to conventional side
Method calculates each elevation of satellite, and it is 0 degree that elevation mask, which is arranged, and the satellite greater than elevation mask is classified as visible satellite.
If AGNSS server can not obtain the general location of terminal, full constellation satellite ephemeris is sent to terminal.
But the prior art has the following disadvantages:
When AGNSS server known terminal general location, directly conventionally setting elevation mask be 0 degree and
The fuzziness of general location is not considered, in this way when the fuzziness of general location larger (such as 500km) or very when big (such as 2000km),
Being bound to cause the visible satellite set calculated, there are larger or very big discrepancy with the practical visible satellite set of terminal.
When AGNSS server does not know the general location of terminal, the satellite ephemeris of full constellation is directly transmitted to terminal, this
Sample had both increased AGNSS server downlink data flow, it is also possible to cause capture terminal speed to slow down and increase power consumption.
Summary of the invention
In view of the above-mentioned problems, the present invention proposes that a kind of visible satellite based on position ambiguity determines method, including following
Step:
Step S1: terminal location and position ambiguity are obtained；
Step S2: according to the position obtained step S1 and position ambiguity, satellite elevation is calculated according to following formula
Angle:
Wherein R is earth mean radius, and U is position ambiguity, and M is satellite elevation mask
Step S3: according to the terminal location obtained in the satellite ephemeris and step S1 of server storage, satellite altitude is calculated
Angle；
Step S4: elevation of satellite is greater than the satellite elevation mask calculated in step 2, then the satellite is classified as visible defend
Star set, otherwise the satellite is classified as invisible satellite set；
Step S5: terminate process.
Step S1 the following steps are included:
Step S11: determining whether terminal has directly reported position and position ambiguity, has reported position and location fuzzy,
It then determines that position and fuzziness obtain successfully, completes step S1；
Step S12: terminal does not report position and fuzziness, then further determines the mobile cellular base station identity of terminal connection
Whether information is known；The mobile cellular base station identity information of terminal connection is it is known that be then transferred to step S13；The movement of terminal connection
Cellular base station identity information is unknown, then is transferred to step S14；
Step S13: mobile cellular base station record is inquired into cell-site location information database whether there is；Mobile bee
Nest base station record exists, then obtains mobile cellular base station and record corresponding position and its fuzziness, complete step S1；Mobile cellular
Base station record is not present, and is transferred to step S17；
Step S14: inquiry WLAN information: WLAN information is it is known that be then transferred to step S15；WLAN information is unknown, then is transferred to step
Rapid S16；
Step S15: WLAN record is inquired into WLAN data library: WLAN record exists, then obtains WLAN record
Corresponding position and its fuzziness complete step S1；WLAN record is not present, then it is assumed that and position and fuzziness obtain failure,
Terminate process；
Step S16: think that position and fuzziness obtain failure, terminate process；
Step S17: record from MCC data base querying MCC: successful inquiring then successfully obtains position Loc1 and its fuzziness
Unc1 is transferred to step S18；Inquiry failure, terminates process；
Step S18: correspond to MNC record from MNC data base querying: successful inquiring then obtains position Loc2 and its fuzziness
Unc2 completes step S1；Inquiry failure, then be still used as stream using by MCC the position Loc1 inquired and its fuzziness Unc1
Journey output, completes step S1.
Technical solution of the present invention realize the utility model has the advantages that
According to the Cell information or WLAN information of the physical connection that GNSS terminal reports, general location and the position of terminal are determined
Fuzziness is set, terminal location range is reduced, to fast and effeciently determine the visible satellite set of GNSS terminal, and can be with end
True visible satellite set is held to be consistent as far as possible.
Detailed description of the invention
Fig. 1 is the implementation steps that a kind of visible satellite based on position ambiguity of the present invention determines method.
Fig. 2 is that terminal location of the present invention and its fuzziness determine flow chart.
Fig. 3 is that terminal location and its fuzziness flow chart are determined the present invention is based on MCC, MNC.
Fig. 4 is position ambiguity floor map of the present invention (zenith visual angle).
Fig. 5 is the present invention according to position ambiguity calculating satellite elevation mask schematic diagram.
Specific embodiment
In the following with reference to the drawings and specific embodiments, the present invention is further explained, and the embodiment of the present invention is only to illustrate this hair
The protection scope that bright technical solution is not intended to limit the present invention.
As shown in Figure 1, the present invention, which mentions a kind of visible satellite based on position ambiguity, determines method, comprising the following steps:
Step S1: terminal location and position ambiguity are obtained；
Step S2: according to the position obtained step S1 and position ambiguity, satellite elevation is calculated according to following formula
Angle:
Wherein R is earth mean radius, and U is position ambiguity, and M is satellite elevation mask
Step S3: according to the terminal location obtained in the satellite ephemeris and step S1 of server storage, satellite altitude is calculated
Angle；
Step S4: the elevation of satellite is greater than the satellite elevation mask calculated in the step 2, then returns the satellite
For visible satellite set, it is otherwise classified as invisible satellite set；
Step S5: terminate process.
As shown in Figure 2 and Figure 3, step S1 the following steps are included:
Step S11: determining whether terminal has directly reported position and position ambiguity, has reported position and location fuzzy,
It then determines that position and fuzziness obtain successfully, completes step S1；
Step S12: terminal does not report position and fuzziness, then further determines the mobile cellular base station identity of terminal connection
Whether information is known；The mobile cellular base station identity information of terminal connection is it is known that be then transferred to step S13；The movement of terminal connection
Cellular base station identity information is unknown, then is transferred to step S14；
Step S13: mobile cellular base station record is inquired into cell-site location information database whether there is；Mobile bee
Nest base station record exists, then obtains mobile cellular base station and record corresponding position and its fuzziness, complete step S1；Mobile cellular
Base station record is not present, and is transferred to step S17；
Step S14: inquiry WLAN information: WLAN information is it is known that be then transferred to step S15；WLAN information is unknown, then is transferred to step
Rapid S16；
Step S15: WLAN record is inquired into WLAN data library: WLAN record exists, then obtains WLAN record
Corresponding position and its fuzziness complete step S1；WLAN record is not present, then it is assumed that and position and fuzziness obtain failure,
Terminate process；
Step S16: think that position and fuzziness obtain failure, terminate process；
Step S17: record from MCC data base querying MCC: successful inquiring then successfully obtains position Loc1 and its fuzziness
Unc1 is transferred to step S18；Inquiry failure, terminates process；
Step S18: correspond to MNC record from MNC data base querying: successful inquiring then obtains position Loc2 and its fuzziness
Unc2 completes step S1；Inquiry failure, then be still used as stream using by MCC the position Loc1 inquired and its fuzziness Unc1
Journey output, completes step S1.
The present invention is further elaborated below:
Position ambiguity is used to describe the accuracy (or uncertainty) of a certain position, be generally the center of circle to the position,
The range that actual position may be distributed is indicated as the border circular areas of radius using fuzziness, as shown in Figure 4.
Regard ground spheric approximation as standard ball, since earth's surface is spherical surface, C in Fig. 41、C0、C2Positioned at same earth's surface great circle
In segmental arc, the earth is splitted along the earth's surface great circle, obtains sectional view as shown in Figure 5.In Fig. 5, C0C1(or C0C2) segmental arc length is
For position C0Fuzziness, straight line C0P、PC1It is the round tangent line of section (for position C0For, C0P be the position correspondingly
Horizontal line), dotted line C0P1It is parallel to tangent line PC1.With C0C1For, actual position is likely located at C0C1Any point in segmental arc, wherein C1
For boundary critical point, and tangent line PC1Upper left half portion belongs to satellite visibility region.In order to make full use of known location C0And largely subtract
Few visible star determines calculation amount, by tangent line PC1It is moved to dotted line C0P1Place, if note C0P1Corresponding elevation angle is ∠ PC0P1, then
Visible satellite elevation angle is centainly greater than ∠ PC0P1, therefore, by ∠ PC0P1It is determined as satellite elevation mask.
In Fig. 5, due to C0P1It is parallel to tangent line PC1, then ∠ PC0P1Size is equal with θ, and according to geometrical principle, θ and the center of circle
Angle ∠ C0OC1It is equal, therefore, seek elevation mask ∠ PC0P1It is converted into and seeks ∠ C0OC1。
If earth mean radius is R, if position ambiguity is U, then
Due to ∠ PC0P1Positioned at horizon C0P hereinafter, therefore elevation mask be negative value, that is, take ∠ C0OC1Opposite number.
Note satellite elevation mask is M, then has
Satellite altitude is conventionally calculated in conjunction with the terminal location of acquisition according to the satellite ephemeris that server stores
The satellite is classified as visible satellite collection if the elevation of satellite E calculated is greater than the satellite elevation mask M calculated by angle E
It closes；Otherwise, it is classified as invisible satellite set.
In order to make it easy to understand, the present invention relates to terms to be explained as follows:
GNSS:Global Nayigation Satellite System, Global Navigation Satellite System
AGNSS:Assisted Global Nayigation Satellite System, assisted global navigation satellite system
System
Cell:Cellular, cellular network
WLAN:Wireless Local Area Network, Wireless LAN
MCC:Mobile Country Code, Mobile Country Code MCC
MNC:Mobile Network Code, Mobile Network Code
CI:Cell Identity, cell identities number
Cell information: the mobile cellular base station identity information of terminal connection has uniqueness, generally comprises MCC, MNC, CI
Deng.
Cell database: a Cell information and cell-site location information (containing fuzziness) for AGNSS server maintenance
Corresponding database, the database will update and expand for a long time.
WLAN information: the WLAN information of terminal connection or the WLAN fingerprint of terminal local environment.WLAN
Database a: WLAN information of AGNSS server maintenance number corresponding with location information (the containing fuzziness) of hot spot or fingerprint
According to library, which will update and expand for a long time.
MCC database: description MCC and the national center position Loc1 and its fuzziness Unc1 (describe any position in the country
Set the maximum distance relative to national center position) database of corresponding relationship.
MNC database: describe certain national (being determined by MCC) MNC and network operation regional center position Loc2 and its
The number of fuzziness Unc2 (describing maximum distance of any position relative to center in the network operation region) corresponding relationship
According to library.
Claims (1)
1. a kind of visible satellite based on position ambiguity determines method, it is characterised in that the following steps are included:
Step S1: terminal location and position ambiguity are obtained；
Step S2: according to the position obtained the step S1 and position ambiguity, satellite elevation is calculated according to following formula
Angle:
Wherein R is earth mean radius, and U is position ambiguity, and M is satellite elevation mask
Step S3: according to the terminal location obtained in the satellite ephemeris and the step S1 of server storage, satellite altitude is calculated
Angle；
Step S4: the elevation of satellite is greater than the satellite elevation mask calculated in the step S2, then is classified as the satellite
Visible satellite set, otherwise the satellite is classified as invisible satellite set；
Step S5: terminate process；
The position ambiguity is used to describe the accuracy or uncertainty of a certain position, be generally the center of circle to the position,
The range that actual position may be distributed is indicated as the border circular areas of radius using fuzziness；
The step S1 the following steps are included:
Step S11: determining whether terminal has directly reported position and position ambiguity, has reported position and location fuzzy, then really
Positioning is set and fuzziness obtains successfully, completes the step S1；
Step S12: terminal does not report position and fuzziness, then further determines the mobile cellular base station identity information of terminal connection
It is whether known；The mobile cellular base station identity information of terminal connection is it is known that be then transferred to step S13；The mobile cellular of terminal connection
Base station identity information is unknown, then is transferred to step S14；
Step S13: the mobile cellular base station record is inquired into cell-site location information database whether there is；The shifting
Dynamic cellular base station record exists, then obtains the mobile cellular base station and record corresponding position and its fuzziness, complete the step
Rapid S1；The mobile cellular base station record is not present, and is transferred to step S17；
Step S14: inquiry WLAN information: WLAN information is it is known that be then transferred to step S15；WLAN information is unknown, then is transferred to step
S16；
Step S15: WLAN record is inquired into WLAN data library: WLAN record exists, then obtains WLAN record and correspond to
Position and its fuzziness, complete the step S1；WLAN record is not present, then it is assumed that and position and fuzziness obtain failure,
Terminate process；
Step S16: think that position and fuzziness obtain failure, terminate process；
Step S17: record from MCC data base querying MCC: successful inquiring then successfully obtains position Loc1 and its fuzziness Unc1,
It is transferred to step S18；Inquiry failure, terminates process；
Step S18: correspond to MNC record from MNC data base querying: successful inquiring then obtains position Loc2 and its fuzziness Unc2,
Complete the step S1；Inquiry failure, then still using the position Loc1 and its fuzziness Unc1 inquired by MCC as process
Output, completes the step S1.
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| CN201710118910.3A CN106932799B (en) | 2017-03-01 | 2017-03-01 | A kind of visible satellite based on position ambiguity determines method |
| CN201811574217.8A CN109597107B (en) | 2017-03-01 | 2017-03-01 | Visible satellite determining method based on position ambiguity |
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| JP2006284452A (en) * | 2005-04-01 | 2006-10-19 | Mazeran Systems Japan Kk | Satellite positioning method |
| CN101442729A (en) * | 2007-11-12 | 2009-05-27 | 美国博通公司 | Method and system for locating device |
| CN101835258B (en) * | 2010-04-21 | 2013-03-20 | 上海魔睿信息科技有限公司 | Mobile terminal positioning method and system independent of base station positioning information |
| JP5638476B2 (en) * | 2011-07-12 | 2014-12-10 | 株式会社Ｎｔｔドコモ | Positioning support apparatus and positioning support method |
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| CN105204048B (en) * | 2014-06-24 | 2017-06-23 | 东南大学 | A kind of Ambiguity Resolution in Reference Station Network fast resolution algorithm of Big Dipper compatible with GPS/GLONASS |
| CN105510946B (en) * | 2015-12-28 | 2017-10-31 | 辽宁工程技术大学 | A kind of BDS satellite carriers Phase integer ambiguity fast resolution algorithm |
| CN105807301B (en) * | 2016-03-03 | 2018-05-15 | 东南大学 | A kind of optimization of vehicle based on digitally enhanced map selects star positioning method |
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| CN109597107A (en) | 2019-04-09 |
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