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    Study on an effective integrated model of Ka-band mobile satellite channel by Juan WEI, Da LIU, Gang-qi TIAN

    Published 2012-11-01
    “…In order to describe the Ka-band mobile satellite communications channel fading features more realitically,a mobile satellite integrated channel model was proposed.The characteristics of the mobile satellite propogation channel were analysed in detail.Weather conditions,as well as multi-path fading and shadowing were taken into account as main influencing factors.On this basis,airspace channel model was built obeying the Gaussian distribution as well ground surface,which obey Rice,Rayleigh and Lognormal joint distribution.Then the integrated channel model was presented considering weather effects on condition that the two parts are independent each other in the influence of the channel characteristics.The mathematical analysis model and simulation model of the new integrated channel model were established respectively.Finally,the BER(bit error rate)performance was analyzed for different weather conditions and shadows.Compared with the theoretical BER,the integrated channel model in satellite mobile communication systems is correct and reasonable.…”
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  3. 103

    Calibration and Validation of MODIS-Derived Ground-Level Air Temperature Models by Means of Ground Measurements by Marica Teresa Rocca, Marica Franzini, Vittorio Marco Casella

    Published 2024-12-01
    “…Starting from multitemporal MODIS data matrices, we interpolate them to estimate the temperature of the weather stations, in order to compare the estimation with the real weather station data, thus allowing the validation of MODIS data.…”
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  4. 104

    Including the Temporal Dimension in the SECS Technique by S. Marsal, J. M. Torta, F. J. Pavón‐Carrasco, S. P. Blake, M. Piersanti

    Published 2020-10-01
    “…It has been successfully applied to numerous Space Weather (SW) events, whereas some advantages have been reported over other techniques such as Fourier or Spherical (Cap) Harmonic Analysis. …”
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    Ionospheric Nowcasting Over Italy Through Data Assimilation: A Synergy Between IRI UP and IONORING by Alessio Pignalberi, Claudio Cesaroni, Marco Pietrella, Michael Pezzopane, Luca Spogli, Carlo Marcocci, Emanuele Pica

    Published 2024-05-01
    “…Abstract An accurate modeling of the ionosphere electron density is pivotal to guarantee the effective operation of communication and navigation systems, particularly during Space Weather events. Despite the crucial contribution of empirical models like the International Reference Ionosphere (IRI), their limitations in predicting ionospheric variability, especially under geomagnetically disturbed conditions, are acknowledged. …”
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    A New Standalone Tool for DC‐Equivalent Network Generation and GIC Calculation in Power Grids With Multiple Voltage Levels by S. Marsal, J. M. Torta, V. Canillas‐Pérez, J. J. Curto

    Published 2022-03-01
    “…Abstract Space Weather phenomena pose a major socio‐economic threat due, in part, to the vulnerability of power network transformers to geomagnetically induced currents (GIC). …”
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  10. 110

    Characterizing Extreme Geomagnetic Storms Using Extreme Value Analysis: A Discussion on the Representativeness of Short Data Sets by G. Bernoux, V. Maget

    Published 2020-06-01
    “…Abstract One of the main goals when studying Space Weather is to characterize extreme events occurrences and related characteristics. …”
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    Ultrasonic Testing of Railroad Rails: Cold Temperature Effects and Considerations by Aqeel T. Fadhil, Glenn Washer, Anish Poudel, Kalpana Yadav, Survesh Shrestha

    Published 2024-01-01
    “…The research presented in this article investigated the effect of low temperatures on acoustic properties in coupling fluid and rail steel. …”
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  15. 115

    Analysis of Key Technologies and Applications of Meteorological Service for Offshore Wind Power by Boni WANG, Feng WANG, Hangcheng GE, Fang HUANG, Xiaozhuo SANG, Min ZHANG

    Published 2025-01-01
    “…By utilizing the data assimilation techniques and state-of-the-art artificial intelligence methods, combined with numerical models, it developed key technologies such as wind-wave-current forecasting for offshore wind farms, intelligent forecasting of significant wave height and storm surges, as well as high-impact weather monitoring and forecasting alerts. Ultimately, this led to the refinement of meteorological services and applications for offshore wind farms. …”
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    Transpolar Convection and Magnetospheric Ring Current Relations: Real‐Time Applications of the Polar Cap (PC) Indices by Peter Stauning

    Published 2021-07-01
    “…Abstract The present study confirms the validity of previously derived relations between the polar cap (PC) indices and the ASY‐H and the Dst and SYM‐H ring current indices when used in real‐time applications. …”
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    Modeling Geomagnetically Induced Currents in the Alberta Power Network: Comparison and Validation Using Hall Probe Measurements During a Magnetic Storm by Darcy Cordell, Ian R. Mann, Hannah Parry, Martyn J. Unsworth, Ryan Cui, Colin Clark, Eva Kelemen, Ryan MacMullin

    Published 2024-04-01
    “…Abstract During space weather events, geomagnetic disturbances (GMDs) induce geoelectric fields which drive geomagnetically induced currents (GICs) through electrically‐grounded power transmission lines. …”
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