Results 151 to 160 of about 89,960 (192)

Generalized integer aperture estimation for partial GNSS ambiguity fixing

Journal of Geodesy, 2014
In satellite navigation, the key to high precision is to make use of the carrier-phase measurements. The periodicity of the carrier-phase, however, leads to integer ambiguities. Often, resolving the full set of ambiguities cannot be accomplished for a given reliability constraint. In that case, it can be useful to resolve a subset of ambiguities.
Brack, Andreas, Günther, Christoph
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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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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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Resolving Integer Ambiguity of GPS Carrier Phase Difference

IEEE Transactions on Aerospace and Electronic Systems, 2010
A new approach to resolve integer ambiguity and achieve instantaneous spacecraft attitude from phase information of Global Positioning System (GPS) signals, without requiring independent attitude information from traditional attitude sensors is presented. A newly approached algorithm based on Gram-Schmidt orthonormalisation (GSO) is proposed for medium
S. Purivigraipong, S. Hodgart, M. Unwin, S. Kuntanapreeda   +3 more
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Carrier Phase Integer Ambiguity Resolution

2017
Global Navigation Satellite System (GNSS ) carrier-phase integer ambiguity resolution is the process of resolving the carrier-phase ambiguities as integers. It is the key to fast and high-precision GNSS parameter estimation and it applies to a great variety of GNSS models that are currently in use in navigation, surveying, geodesy and geophysics.
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A General Criterion of Integer Ambiguity Search

Journal of Global Positioning Systems, 2002
A general criterion for integer ambiguity searching is derived in this paper. The criterion takes into account not only the residuals caused by ambiguity parameter changing, but also the residuals caused by coordinates changing through ambiguity fixing. The search can be carried out in a coordinate domain, in an ambiguity domain or in both domains. The
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Omega Ambiguity Resolution Through Direct Integer Laning

Navigation, 1976
In multi-frequency omega navigation systems, it is desirable to have the wide lanes of the beat frequency without sacrificing the higher resolution of the original frequencies. Many schemes are available for doing this such as operation on difference frequencies until the system is within a small lane and then switching to the original frequency. Also,
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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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A improved algorithm of integer ambiguity search space

2017 Chinese Automation Congress (CAC), 2017
The ambiguity search space has a great effect on integer ambiguity searching efficiency and confirmation. In the case of high ambiguity dimension, the search space is determined when the ambiguity dimension is large. The conventional method is prone to the ambiguity fixed failure.
Yan Liu, Wentao Bai, Bingnan Pei, Wei Pan   +3 more
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Minimizing the integer ambiguity search space for RTK

Wuhan University Journal of Natural Sciences, 2003
Differential GPS carrier phase measurements have much lower noise and multipath error than that of pseudorange measurements. The result is centimeter accuracy for Real-Time Kinematic (RTK). However, the measurement of the carrier phase has a constant unknown integer ambiguity.
Yang Yun-chun, R. R. Hatch, R. T. Sharpe
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