Results 161 to 170 of about 2,371 (202)

Integer Ambiguity Resolution by Mixture Kalman Filter for Improved GNSS Precision

IEEE Transactions on Aerospace and Electronic Systems, 2020
Accurate carrier-phase integer ambiguity resolution is fundamental to high-precision global navigation satellite systems (GNSSs). Real-time GNSSs typically resolve the ambiguities by a combination of recursive estimators and integer least-squares solvers, which need to be reset when satellites are added or cycle slip occurs. In this article, we propose
Karl Berntorp, Avishai Weiss, Stefano Di Cairano   +2 more
exaly   +2 more sources

Improvement of PPP-inferred tropospheric estimates by integer ambiguity resolution

Advances in Space Research, 2012
Abstract Integer ambiguity resolution in Precise Point Positioning (PPP) can improve positioning accuracy and reduce convergence time. The decoupled clock model proposed by Collins (2008) has been used to facilitate integer ambiguity resolution in PPP, and research has been conducted to assess the model’s potential to improve positioning accuracy ...
J. Shi, Y. Gao
exaly   +2 more sources

INS aided GPS integer ambiguity resolution

2011 IEEE International Conference on Control Applications (CCA), 2011
Real-time high precision GPS positioning is based on carrier phase measurements, which requires fast and precise on-the-fly integer ambiguity resolution. In some navigation applications, external sensors are available that provide auxiliary measurements.
Anning Chen, Dongfang Zheng, Arvind Ramanandan, Jay A. Farrell   +3 more
openaire   +1 more source

Aided integer ambiguity resolution algorithm

PLANS 2004. Position Location and Navigation Symposium (IEEE Cat. No.04CH37556), 2004
The key issue in precise positioning using the GPS carrier phase is to solve for the integer ambiguities quickly and correctly. For some navigation applications, external sensors am available that provide auxiliary measurements. For example, in the control and guidance of land vehicles relative to a desired trajectory (e.g., lane-keeping on a highway ...
null Jingrong Cheng, J.A. Farrell, null Lu Yu, E. Thomas   +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

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
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

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

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