DK200001053A - position Monitoring - Google Patents

position Monitoring Download PDF

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Publication number
DK200001053A
DK200001053A DK200001053A DKPA200001053A DK200001053A DK 200001053 A DK200001053 A DK 200001053A DK 200001053 A DK200001053 A DK 200001053A DK PA200001053 A DKPA200001053 A DK PA200001053A DK 200001053 A DK200001053 A DK 200001053A
Authority
DK
Denmark
Prior art keywords
position vectors
signals
calculated
position monitoring
satellites
Prior art date
Application number
DK200001053A
Other languages
Danish (da)
Inventor
Kai Borre
Original Assignee
Gps Survey Aps
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Gps Survey Aps filed Critical Gps Survey Aps
Priority to DK200001053A priority Critical patent/DK200001053A/en
Priority to PCT/DK2001/000453 priority patent/WO2002004978A1/en
Priority to AU2001268952A priority patent/AU2001268952A1/en
Publication of DK200001053A publication Critical patent/DK200001053A/en

Links

Classifications

    • 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
    • G01S19/43—Determining position using carrier phase measurements, e.g. kinematic positioning; using long or short baseline interferometry
    • G01S19/44—Carrier phase ambiguity resolution; Floating ambiguity; LAMBDA [Least-squares AMBiguity Decorrelation Adjustment] method
    • 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
    • G01S19/03—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers
    • G01S19/04—Cooperating elements; Interaction or communication between different cooperating elements or between cooperating elements and receivers providing carrier phase data
    • 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
    • G01S19/22—Multipath-related issues

Description

PATENTKRAV 1. Fremgangsmåde til reducering af virkningen af multipath forsinkelse i overvågningssystemer, der anvender signaler modtaget fra positioneringssatellitter, hvori den positionsbaserede konstellation af positioneringsatellitterne gentages med en periode på D timer, kendetegnet ved, at fremgangsmåden omfatter trinene - at der ved mindst to punkter er placeret organer til at modtage satellitsignaler for på et første tidspunkt at tilvejebringe en første sæt positionsvektorer, der er beregnet af signaler fra mindst fire positionssatellitter og at lagre positionsvektoreme i et lagermedium, - på et andet tidspunkt, efter et helt antal D timer, at tilvejebringe et andet sæt positionsvektorer, der er beregnet fra signaler fra de samme mindst fire satellitter, - at overføre positionsvektoreme, der er tilvejebragt fra de mindst to punkter, til en central behandlingsstation, - at fratrække nævnte andet sæt positionsvektorer fra nævnte første sæt positionsvektorer. 2. Fremgangsmåde ifølge krav 1, kendetegnet ved, at den periodiske cyklus er 23 timer 56 minutter. 3. Fremgangsmåde ifølge ethvert af de foregående krav, kendetegnet ved, at nævnte beregning af positionsvektorer omfatter en korrektion af signalerne for effekter på grund af ionosfærisk forsinkelse og på grund af troposfærisk forsinkelse. 4. Fremgangsmåde ifølge ethvert af de foregående krav, kendetegnet ved, at nævnte fremgangsmåde yderligere omfatter at lagre beregnede multipath fejl mellem enhver satellit og enhver antenne for enhver målt tidsperiode i en tabel. 5. Fremgangsmåde ifølge ethvert af de foregående krav, kendetegnet ved, at det første sæt positionsvektorer lagres sammen med data, der er karakteristiske for vejrforholdene, især data, der relaterer til overfladetryk, fugtighed og temperatur. 6. Apparat for tilvejebringelse af positionsvektorer mellem et referencepunkt og et relativt geografisk punkt af interesse - en første antenne, der er placeret ved et referencepunkt og i stand til at modtage signaler fra positionssatellitter - en anden antenne, der er placeret ved det relative punkt af interesse og i stand til at modtage signaler fra positionssatellitter, - en computer, der er i stand til at modtage signalerne fra den første og den antenne og i stand til at beregne positionsvektorer fra nævnte signaler, kendetegnet ved, at nævnte computer er i stand - til at lagre beregnede positions vektorer mellem referencepunkt og objektpunkt, og - at beregne restforskelle mellem positionsvektorer, som er blevet beregnet ifølge modtagne satellitsignaler, der har en gensidig tidsforsinkelse, som er et multiplum af D timer. 7. Apparat ifølge krav 6, kendetegnet ved, at beregningen af positionsvektorer omfatter en modelbaseret korrektion af signalerne for ionosfærisk forsinkelse og for troposfærisk forsinkelse. 8. Apparat ifølge krav 6 eller 7, kendetegnet ved, at computeren kan lagre beregnede multipath fejl mellem enhver satellit og enhver antenne for enhver målt tidsperiode i en tabel.PATENT REQUIREMENT 1. A method for reducing the effect of multipath delay in monitoring systems using signals received from positioning satellites, repeating the position-based constellation of the positioning satellites with a period of D hours, characterized in that the method comprises the steps of - at least two points: positioning means for receiving satellite signals to provide, at a first time, a first set of position vectors calculated from signals from at least four position satellites and to store the position vectors in a storage medium, - at a second time, after a full number of D hours, to provide a second set of position vectors calculated from signals from the same at least four satellites, - transmitting the position vectors provided from the at least two points to a central processing station, - subtracting said second set of position vectors from said first set of position vectors. Process according to claim 1, characterized in that the periodic cycle is 23 hours 56 minutes. Method according to any of the preceding claims, characterized in that said calculation of position vectors comprises a correction of the signals for effects due to ionospheric delay and due to tropospheric delay. Method according to any of the preceding claims, characterized in that said method further comprises storing calculated multipath errors between any satellite and any antenna for any measured time period in a table. Method according to any one of the preceding claims, characterized in that the first set of position vectors is stored together with data characteristic of the weather conditions, in particular data relating to surface pressure, humidity and temperature. 6. Apparatus for providing position vectors between a reference point and a relative geographical point of interest - a first antenna located at a reference point and capable of receiving signals from position satellites - a second antenna located at the relative point of - a computer capable of receiving the signals from the first and the antenna and capable of calculating position vectors from said signals, characterized in that said computer is capable, - storing calculated position vectors between reference point and object point; and - calculating residual differences between position vectors which have been calculated according to received satellite signals having a mutual time delay which is a multiple of D hours. Apparatus according to claim 6, characterized in that the calculation of position vectors comprises a model-based correction of the signals for ionospheric delay and for tropospheric delay. Apparatus according to claim 6 or 7, characterized in that the computer can store calculated multipath errors between any satellite and any antenna for any measured time period in a table.

DK200001053A 2000-07-06 2000-07-06 position Monitoring DK200001053A (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
DK200001053A DK200001053A (en) 2000-07-06 2000-07-06 position Monitoring
PCT/DK2001/000453 WO2002004978A1 (en) 2000-07-06 2001-06-29 Positioning survey system
AU2001268952A AU2001268952A1 (en) 2000-07-06 2001-06-29 Positioning survey system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DK200001053A DK200001053A (en) 2000-07-06 2000-07-06 position Monitoring

Publications (1)

Publication Number Publication Date
DK200001053A true DK200001053A (en) 2002-01-07

Family

ID=8159602

Family Applications (1)

Application Number Title Priority Date Filing Date
DK200001053A DK200001053A (en) 2000-07-06 2000-07-06 position Monitoring

Country Status (3)

Country Link
AU (1) AU2001268952A1 (en)
DK (1) DK200001053A (en)
WO (1) WO2002004978A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU2003901463A0 (en) * 2003-03-31 2003-04-17 Qx Corporation Pty Ltd A method and device for multipath mitigation in positioning systems using clustered positioning signals

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5323322A (en) * 1992-03-05 1994-06-21 Trimble Navigation Limited Networked differential GPS system

Also Published As

Publication number Publication date
AU2001268952A1 (en) 2002-01-21
WO2002004978A1 (en) 2002-01-17

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Legal Events

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AHB Application shelved due to non-payment