Results 171 to 180 of about 16,903 (186)

Tropospheric Delay from VLBI and GNSS Measurements

Astronomy Letters, 2018
Using an updated version of the QUASAR software package developed at the Institute of Applied Astronomy of the Russian Academy of Sciences, we have processed the VLBI observations within the international CONT14 program (May 6–20, 2014), in which a global network of 17 stations was involved (a total of ~250 000 observations).
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Estimation of tropospheric time delay for Indian LAAS

2013 International Conference on Emerging Trends in VLSI, Embedded System, Nano Electronics and Telecommunication System (ICEVENT), 2013
In LAAS with airport pseudolites (APLs), error introduced in the signals due to tropospheric time delay proves to be the largest in pseudolite error budget. In this paper, tropospheric delay (TD) is estimated using Hopfield model and RTCA model for a typical LAAS scenario. Hopfield model is used to estimate delay in GPS signal and RTCA model is used to
Q. Sultana, A. D. Sarma, M. Q. Javeed
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Evaluation of Different Tropospheric Delay Models

2008
Tropospheric delay can be a signifi cant source of error in satellite-based positioning systems. Two basic types of delay prediction models exist, the first using surface meteorological parameters to estimate the magnitude of the tropospheric delay, and the other global models using average and seasonal variation data.
Kos, Tomislav, Markežić, Ivan, Botinčan, Maja   +2 more
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Estimation of Tropospheric Delay Models Compliance

2008
Tropospheric delay can be a significant source of error for satellite-based positioning systems, if it is not properly estimated. Two basic types of delay prediction models exist. The first use surface meteorological parameters to estimate the magnitude of the tropospheric delay, and the other global models use average and seasonal variation data.
Kos, Tomislav, Botinčan, Maja, Markežić, Ivan   +2 more
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An Tropospheric Delay Model for GPS NET RTK

2010 Second International Conference on Information Technology and Computer Science, 2010
The network-based GPS technique provides a broad Spectrum of corrections for real-time kinematic. And the atmospheric refraction error is the main factors to be sufficient to support the ambiguity resolution (AR) and accuracy of the long-distance RTK.
Qiu Lei, Li Lei, Wang Zemin
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Assessment of BeiDou’s Tropospheric Model (IGGtrop) for tropospheric delay correction in northern hemisphere

Journal of Applied Geodesy, 2019
Abstract Satellite navigation systems face different types of errors that affect the positioning accuracy. The tropospheric delay considers one of the major sources of error for the transmitted signal that could face a tropospheric delay of over 2 m at zenith and 20 m at lower satellite elevation angles. A positioning error of 10 m could
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Modeling tropospheric delays for space geodetic techniques

2017
Elektromagnetische Wellen werden auf ihrem Signalweg durch die neutrale Atmosph re oder Troposph re verz gert und gekr mmt. Da es keine M glichkeit gibt, diese troposph rische Laufzeitverz gerung mit ausreichender Genauigkeit direkt zu messen, muss sie stattdessen mittels Daten aus anderen Quellen modelliert werden.
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Prediction of troposphere wet delay

Journal of Applied Geodesy, 2011
Ahmed El-Mowafy, Johnny Lo
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Tropospheric slant delays interpolating multiple mapping functions

Representing the tropospheric slant delays in geodesy can get complicated due to the inhomogeneity and fast variations of the weather. Mapping functions are the most common used tool for this task, but due to the lack of information when calculating the parameters of the mapping functions, relevant errors could appear.
Angel Navarro Trastoy, Ghodsiyeh Motlagh Zadeh, Maksym Vasiuta, Patrick Dumitraschkewitz, Torsten Mayer-Gürr, Heikki Jarvinen   +5 more
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Modeling Research on Tropospheric Delay Mapping Function

2023 Cross Strait Radio Science and Wireless Technology Conference (CSRSWTC), 2023
Ruoyu Li, Leke Lin, Xiangming Chen, Qiang Zhang   +3 more
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