[특허]Method of precise position determination

[미국특허] Method of precise position determination 원문보기

IPC분류정보
국가/구분	United States(US) Patent 등록
국제특허분류(IPC7판)	G01S-005/08 H04B-007/185
출원번호	US-0849065 (1992-04-23)
우선권정보	DE-4026740 (1990-08-24)
국제출원번호	PCT/EP91/01504 (1991-08-07)
§371/§102 date	19920423 (19920423)
국제공개번호	WO-9203747 (1992-03-05)
발명자 / 주소	Frei Erwin (Widnau CHX)
출원인 / 주소	Leica Heerbrugg A.G. (Heerbrugg CHX 03)
인용정보	피인용 횟수 : 33 인용 특허 : 0

초록 ▼

The method of precise position determination, in particular for geodetic positioning by means of carrier-frequency phase-difference measurement on GPS satellites, uses a double difference (Df12nm (k)) of a measured phase values, forms an initial solution for a position vector (xjc) by means of a compensation calculation, and actual phase ambiguities (xjN) and then integer alternative phase ambiguities (xjA). A rapid reduction in the number of alternative phase ambiguities (xjA) to be processed and automatic statistical protection of the results is achieved by means of special statistical selection tests, using a corresponding cofactor matrix (Qxxj) and an a posteriori rms error (m0s) of the initial solution. In this way, the required number of satellites (4 to 5) observed and the observation duration (a few minutes) can be reduced considerably, likewise the computer cost. Operator decisions are eliminated.

대표청구항 ▼

A method of precise position determination a) of a first receiver (R1) at a measurement location (r1) relative to b) a second receiver (R2) at a reference location (r2), c) using a number of transmitters (Sn) of electromagnetic radiation, which is received by the receivers (R1R2) and whose position is known relative to one another and relative to the two receives (R1, R2) at a time of a measurement with a certain accuracy, d) each receiver (R1, R2) producing a measured phase value (fin (k)) per transmitter (Sn) for a number of time epochs (Ek), which measured phase value, except for an additive complete phase ambiguity (nifn(k)), determines quotients of a transmitter-receiver distance (│rin│) and a wavelength (lf) of the electromagnetic radiation precisely and e) the measured phase values (fn(k)) and the position of the transmitters (Sn) stored for each epoch (Ek) and supplied to an automatic data processing installation wherein they are processed in a program-controlled manner, f) an initial solution produced using a compensation calculation unit by forming a double difference (Df12nm(k)) of measured phase values (fin(k)) for each pair of transmitters (Sn, Sm), fa) a solution vector (xj) of which initial solution contains as components (xji) approximate values for 3 components of the position vector to be determined (xjc) and actual approximate values of all phase ambiguities (xjN) and which, at the same time, provides fb) a corresponding cofactor matrix (Qxxj) and fc) an a posteriori rms error (m0j); g) according to which, integer alternative phase ambiguities (xjAi) are formed within an interval characterized by the a posteriori rms error (m0) around each actual phase ambiguity (xjNi) and h) various combinations (xjA) of alternative phase ambiguities (xjAi) are used as known variables to determine alternative position vectors (xjAc) and associated rms errors (m0j), i) the alternative position vector (xsAc:) with the minimum rms error (m0s) is determined; wherein j) combinations (xjA) of alternative phase ambiguities (xjAi) formed are subjected to a statistical selection test which takes into account a correlation of the phase ambiguities (xjAi), which is characterized by a corresponding cofactor matrix (Qxxj) and a posteriori rms error (m0, and k) only the combinations (xjA) of alternative phase ambiguities (xjAi) which have passed the selection test are used as known variables to determine alternative position vectors (xjAc) and associated rms errors (m0j); l) the minimum rms error (m0s) is tested to determine whether 1a) the associated alternative position vector (xsAc) can be statistically combined with the position vector (xjC) of the initial solution and 1b) the minimum rms error (mos) can be statistically combined with an a priori variance (s0) of the initial solution, and 1c) the difference with respect to the second smallest rms error (m0s′) is statistically significant, m) in the presence of these conditions for the minimum rms error (m0s), the alternative position vector (xsAC) having the minimum rms error (m0s) is produced as the measured value of the precise position determination.

이 특허를 인용한 특허 (33) 인용/피인용 타임라인 분석

Waid James D. (Grove City OH), Apparatus and method using relative GPS positioning for aircraft precision approach and landing.
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Kennedy ; III William C. ; Westerlage Kenneth R., Data messaging in a communications network using a feature request.
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Kennedy ; III William C. ; Westerlage Kenneth R. ; Hammer Kenneth W., Data messaging in a communications network using a feature request.
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Westerlage Kenneth R. ; Kennedy ; III William C., Data messaging in a communications network using a feature request.
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Larschan, Bradley R.; Lesesky, Alan C.; Bishop, Jr., J. Richard; Welch, James W., Driver activity and vehicle operation logging and reporting.
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Larschan, Bradley R.; Lesesky, Alan C.; Bishop, Jr., J. Richard; Welch, James W., Driver activity and vehicle operation logging and reporting.
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Larschan, Bradley R.; Lesesky, Alan C.; Bishop, Jr., J. Richard; Welch, James W., Driver activity and vehicle operation logging and reporting.
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Larschan,Bradley R.; Lesesky,Alan C.; Bishop, Jr.,J. Richard; Welch,James W., Driver activity and vehicle operation logging and reporting.
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Zhang Qiyue John, Hybrid approach for antenna baseline self-survey and line bias calibration using GPS carrier phase.
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Wortham Larry C., Locating system and method using a mobile communications network.
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Kennedy ; III William C. ; Russell Thomas D. ; Westerlage Kenneth R., Method and apparatus for call delivery to a mobile unit.
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Westerlage Kenneth R. ; Kennedy ; III William C. ; Saunders William C. ; Beasley Dale E. ; Hoag William L., Method and apparatus for determining expected time of arrival.
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Westerlage Kenneth R. (Fort Worth TX) Kennedy ; III William C. (Dallas TX) Hoag William L. (Farmers Branch TX), Method and apparatus for determining tax of a vehicle.
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Westerlage Kenneth R. ; Kennedy ; III William C. ; Hoag William L., Method and apparatus for determining tax of a vehicle.
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Bonel, Roland; Coatantiec, Jacques; Legoll, Sebastien Francois Philippe, Method and integrity verification device location information obtained by at least two satellite geolocation devices.
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Larschan, Bradley R.; Lesesky, Alan C.; Bishop, Jr., J. Richard; Welch, James W., Method for data communication between a vehicle and fuel pump.
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Larschan, Bradley R.; Lesesky, Alan C.; Bishop, Jr., J. Richard; Welch, James W., Method for data communication between a vehicle and fuel pump.
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Lesesky, Alan C.; Larschan, Bradley R.; Bishop, Jr., J. Richard, Method for data communication between vehicle and fuel pump.
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Vigen Erik,NOX, Method for integrity monitoring in position determination.
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Lesesky, Alan C., Method for logging and reporting driver activity and operation of a vehicle.
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Boyer, Pete A.; Mia, Rashidus S.; Segall, Edward Joseph, Method for position estimation using generalized error distributions.
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Hamza,Ridha M, Multi-sensor information fusion technique.
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Kennedy ; III William C. (Dallas TX) Charles Robert J. (Plano TX), Phantom mobile-identification number method and apparatus.
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Speasl Jerry A. ; Schupak Leonard, Positioning system and method.
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Yang Xinyu ; Brock Robert, RDOP surface for GPS relative positioning.
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Mitchell Scott ; Cubbedge Skip, Real time precision orbit determination system.
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Semler James Russell ; Thorndyke ; Jr. Earl Clare, Real-time high-accuracy determination of integer ambiguities in a kinematic GPS receiver.
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Fenton, Patrick C., Seismic measuring system including GPS receivers.
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Cohen Clark E. ; Parkinson Bradford W. ; Powell John D. ; Lawrence David G. ; Pervan Boris S. ; Cobb Henry S., System and method for generating precise position determinations.
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Wortham, Larry C., System and method for locating a mobile unit within the service area of a mobile communications network.
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Beasley Dale E. (Flower Mound TX) Kennedy ; III William C. (Dallas TX) Westerlage Kenneth R. (Fort Worth TX), System and method for remote patching of operating code located in a mobile unit.
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Lesesky, Alan C., System for logging and reporting driver activity and operation data of a vehicle.
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Manzen,Yoshihisa, Terminal with position-measuring functions.
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A	생활필수품
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[미국특허] Method of precise position determination 원문보기