Results 161 to 170 of about 2,220 (199)

Integer aperture ambiguity resolution based on difference test

Journal of Geodesy, 2015
Carrier-phase integer ambiguity resolution (IAR) is the key to highly precise, fast positioning and attitude determination with Global Navigation Satellite System (GNSS). It can be seen as the process of estimating the unknown cycle ambiguities of the carrier-phase observations as integers. Once the ambiguities are fixed, carrier phase data will act as
Jingyu Zhang, Meiping Wu, Tao Li, Kaidong Zhang   +3 more
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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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A comparison of three PPP integer ambiguity resolution methods

GPS Solutions, 2013
Precise point positioning (PPP) integer ambiguity resolution with a single receiver can be achieved using advanced satellite augmentation corrections. Several PPP integer ambiguity resolution methods have been developed, which include the decoupled clock model, the single-difference between-satellites model, and the integer phase clock model.
Junbo Shi, Yang Gao
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Improving GNSS data analysis with undifferenced integer ambiguity resolution

2023
Along with other space geodetics, the Global Navigation Satellite Systems (GNSS) technique has a profound impact on the realization of terrestrial reference frames and the provision of geodetic and geophysical parameters such as Earth Rotation Parameters (ERP) and geocenter (GCC) coordinates.
Longjiang Tang, Jungang Wang, Liangwei Nie, Huizhong Zhu, Maorong Ge, Harald Schuh   +5 more
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R-ratio test threshold selection in GNSS integer ambiguity resolution

Journal of Applied Geodesy, 2022
Abstract Ensuring that ambiguity cycles are correctly fixed as integers is a critical prerequisite for ensuring the reliability of GNSS high-precision carrier positioning results. As a result, it is both theoretically and practically important to investigate the performance of the ambiguity validation test by selecting an appropriate ...
Yanze Wu, Xianwen Yu, Jiafu Wang
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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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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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New Approach for Integer Ambiguity Resolution using Interval Analysis

Navigation, 2008
: A new algorithm is proposed for resolving the integer ambiguities encountered in GNSS carrier phase observations. The algorithm is based on Interval Analysis, which deals with computations on intervals of numbers instead of crisp numbers. The advantage of optimization algorithms using interval analysis is that they will detect all solutions within a ...
E. DE WEERDT, E. VAN KAMPEN, Q. P. CHU, J. A. MULDER   +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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Direct Ambiguity Resolution Using Integer Nonlinear Programming Methods

1996
This paper presents a new and efficient strategy for ambiguity resolution on the fly. The new approach is based on the method of Integer Nonlinear Programming (INLP). After discussing some typical methods for INLP, ambiguity resolution of GPS phase measurements based on the Integer Least-Squares Method (ILSM) is formulated as a problem of INLP.
M. Wei, K. P. Schwarz
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