Results 221 to 230 of about 3,052 (255)

Near-real-time GPS integer ambiguity resolution

IEEE Conference on Decision and Control and European Control Conference, 2011
Real-time decimeter accuracy GPS positioning can be achieved using carrier phase measurements. This requires fast and reliable on-the-fly integer ambiguity resolution. However, in GPS challenged areas (e.g. Urban canyons, tunnels, thick canopy etc.) the GPS receiver may not be able to track a sufficient number of satellites to resolve the integer ...
Anning Chen, Dongfang Zheng, Arvind Ramanandan, Jay A. Farrell   +3 more
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Integer ambiguity resolution in GPS using particle filtering

Proceedings of the 2001 American Control Conference. (Cat. No.01CH37148), 2001
Using carrier phase measurements enables the differential GPS to reach centimeter level accuracy. A phase lock loop cannot measure the full cycle part of the carrier phase. This unmeasured part is called integer ambiguity that requires to be resolved through other means. In this paper we present a new integer ambiguity resolution method. In this method
Babak Azimi-Sadjadi, P. S. Krishnaprasad
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Resolution of Integer Ambiguity in GPS Attitude Determination

2011 First International Conference on Instrumentation, Measurement, Computer, Communication and Control, 2011
In order to resolve the carrier phase ambiguity in attitude determination, a new approach is proposed and discussed. A method for static baseline vector estimation is derivate based on the epoch-difference carrier phase and a receiver clock bias model. By using the estimated baseline vector, a float solution of ambiguity is computed.
Chuang Liu, Pei Chen
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Applied Interval Based Integer Ambiguity Resolution

Navigation, 2009
This paper provides improvements on the interval integer ambiguity resolution algorithm BOUNDS, which can give theoretical guarantees on finding the correct integers. The BOUNDS algorithm is validated by applying it to real GPS data and comparing it to the LAMBDA method.
E. VAN KAMPEN, E. DE WEERDT, Q.P. CHU, J.A. MULDER   +3 more
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Integer ambiguity resolution in GPS for spinning spacecrafts

IEEE Transactions on Aerospace and Electronic Systems, 1999
A procedure to compute the integer ambiguity problem when a GPS receiver is used in a multiple antenna configuration attached to a rotating spacecraft is presented. The method is applied to a simulation of an experimental satellite which uses the GPS receiver for attitude determination.
C. Ferrando, A. Perez, R.S. Sanchez Pena
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On the Reliability of Integer Ambiguity Resolution

Navigation, 2005
Global Navigation Satellite System (GNSS) carrier-phase observations are ambiguous by an unknown, integer number of cycles. These integer ambiguity parameters need to be resolved before carrier-phase observations can begin to serve as very precise pseudorange measurements. Optimal estimation of the integer ambiguities involves a complex mapping of real-
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Integer ambiguity resolution in phase closure imaging

Journal of the Optical Society of America A, 2001
Phase calibration is the key operation of phase closure imaging. In the case of nonredundant arrays, the related problem amounts to finding the node of a Z lattice closest to the end of a vector, the components of which are the differences between the closure phases of the data and those of the model.
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Improved Integer Ambiguity Resolution Technique for Fixed Arrays

Journal of Guidance, Control, and Dynamics, 2005
A method for quickly and accurately determining the integer ambiguities associated with carrier phase measurements on a rigid antenna array is presented. Residuals generated from the difference between the global positioning system measurements and the hypothesized value have been used in the multiple-hypothesis Wald sequential probability test (MHWSPT)
Jonathan D. Wolfe, Jason L. Speyer
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A GNSS integer ambiguity resolution method based on ambiguity domain search strategy

2016 IEEE International Conference on Electronic Information and Communication Technology (ICEICT), 2016
A new integer ambiguity resolution method is proposed to solve influence caused by Ambiguity real solutions accuracy and high dimensions on LAMBDA search strategy. Its search efficiency is very close to bootstrap algorithm and the success rate is higher. The reason is that the new method set reasonable number of ambiguity reservation number.
Zheng Dou, Jiaji Sun, Wenxu Zhang, Jianbo Hu   +3 more
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Modified weighted integer least squares estimations for GNSS integer ambiguity resolution

Survey Review, 2013
In this contribution, modified versions of Agrell, Eriksson, Vardy, Zeger (AEVZ) algorithms for integer ambiguity resolution of GNSS phase observations are presented. This modification removes many redundant mathematical operations of the AEVZ algorithm based on a recursive function.
S. Jazaeri, A. Amiri-Simkooei, M. Sharifi   +2 more
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