Results 151 to 160 of about 2,220 (199)

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
openaire   +1 more source

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
openaire   +1 more source

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
openaire   +1 more source

Integer Ambiguity Resolution with Nonlinear Geometrical Constraints

2011
Integer ambiguity resolution is the key to obtain very accurate positioning solutions out of the GNSS observations. The Integer Least Squares (ILS) principle, a derivation of the least-squares principle applied to a linear system of equations in which some of the unknowns are subject to an integer constraint, was demonstrated to be optimal among the ...
Giorgi, G, Teunissen, Peter, Verhagen, S, Buist, Peter   +3 more
openaire   +3 more sources

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
openaire   +1 more source

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
B. Azimi-Sadjadi, P.S. Krishnaprasad
openaire   +1 more source

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
openaire   +1 more source

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.
openaire   +2 more sources

Fast integer ambiguity resolution for GPS attitude determination

Guidance, Navigation, and Control Conference and Exhibit, 1999
In this paper, a new algorithm for GPS (Global Positioning System) integer ambiguity resolution is shown. The algorithm first incorporates an instantaneous (static) integer search to significantly reduce the search space using a geometric inequality.
E. Lightsey, John Crassidis, F. Markley
openaire   +1 more source

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
openaire   +1 more source