Results 41 to 50 of about 127,808 (185)
Quarterly Journal of the Royal Meteorological Society, EarlyView.Satellite radiance observations are spatially thinned using a grid‐based selection that retains one representative profile per cell. When observation errors are spatially correlated but treated as uncorrelated in the assimilation system, reducing thinning increases their influence, leading to overfitting and reduced analysis fit with other observations.
Joel Bedard +3 more
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Summary of Research 2000, Department of Meteorology [PDF]
, 2000 The views expressed in this report are those of the authors and do not reflect the official policy or position of the Department of Defense or U.S.
Faculty of the Department of Meteorology, Naval Postgraduate School
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Geodesy and GeodynamicsThe precise correction of atmospheric zenith tropospheric delay (ZTD) is significant for the Global Navigation Satellite System (GNSS) performance regarding positioning accuracy and convergence time.
Debao Yuan +6 more
doaj +1 more source
Instrumental Error Tolerance in Theodolite Measurements of Upper Winds [PDF]
Biuletyn Wojskowej Akademii TechnicznejModern military conflicts highlight the need for military equipment to be independent of GNSS and radio communications,which are vulnerable to interference and can reveal the position of troops.
Jolanta Siewert, Janusz Jasiński
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Geosystems and Geoenvironment, 2023 Recent studies on the application of Zenith Tropospheric Delay (ZTD) in meteorology and geodesy have shown improved accuracy with the use of locally estimated ZTD compared to Global ZTD.
Ifechukwu Ugochukwu Nzelibe +1 more
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Integrating Image Segmentation and Deep Learning to Improve Radio Frequency Propagation Models
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT This paper proposes a multi‐sensor approach to improve radio frequency (RF) propagation models, which play a key role in the rapidly expanding field of connected vehicle technology. Focusing on the 1‐ to 20‐GHz frequency range, which is critical for both satellite‐to‐vehicle and base station‐to‐vehicle communications, our study introduces a ...
Jonathan Israel +2 more
wiley +1 more source
Multi-Global Navigation Satellite System for Earth Observation: Recent Developments and New Progress
Remote SensingThe Global Navigation Satellite System (GNSS) has made important progress in Earth observation and applications. With the successful design of the BeiDou Navigation Satellite System (BDS), four global navigation satellite systems are available worldwide,
Shuanggen Jin +3 more
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GNSS for Neutral Atmosphere and Severe Weather Monitoring [PDF]
, 2022 The ability of ground-based global navigation satellite system (GNSS) receivers to detect tropospheric water vapor was demonstrated during the early 1990s.
Brenot, H.
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Long‐Term Propagation Measurements in Madrid in a Q‐Band Satellite‐to‐Earth Link
International Journal of Satellite Communications and Networking, EarlyView.ABSTRACT The Q/V band (40/50 GHz) is gaining interest as satellite operators will need larger bandwidth to be able to provide their services, which are experiencing an increasingly high demand. An accurate characterization of the satellite‐to‐Earth propagation channel is of paramount importance to guarantee a high level of quality of service, by ...
Domingo Pimienta‐del‐Valle +3 more
wiley +1 more source
GNSS Satellite Orbit Validation Using Satellite Laser Ranging [PDF]
, 2013 With a total of four new regional and global navigation sa tellite systems that have launched first satellites or even started an operational serv ice, the GNSS landscape has experienced major changes in recent years.
Steigenberger, Peter +2 more
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