Showing 1,421 - 1,440 results of 2,648 for search '"satellites"', query time: 0.07s Refine Results
  1. 1421

    The Investigation of Global Real-Time ZTD Estimation from GPS/Galileo PPP Based on Galileo High Accuracy Service by Xin Chen, Xuhai Yang, Yulong Ge, Yanlong Liu, Hui Lei

    Published 2024-12-01
    “…Firstly, the accuracy of satellite orbit and clock products of the HAS GPS and HAS Galileo system are evaluated. …”
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    Article
  2. 1422

    Tracking over 30 years of coral reef infrastructure degradation in Barbados by Aliyah Griffith, Max Buglisi, Sandra Lee, Karl Castillo

    Published 2025-01-01
    “…Our results underscore the urgency of monitoring reef health and highlight the potential limitations of satellite assessment. This research enhances understanding of reef dynamics and offers a framework for identifying vulnerable areas, which are crucial for effective conservation efforts.…”
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    Article
  3. 1423

    Mechanics Design of Conical Spiral Structure for Flexible Coilable Antenna Array by Hairui Wang, Yao Zhang, Siyu Chen, Yinji Ma, Heling Wang, Ying Chen, Xue Feng

    Published 2022-01-01
    “…The above findings have potential applications in the effective reduction of antenna array weight and satellite launch costs.…”
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    Article
  4. 1424

    Climatology of Total Cloudiness in the Arctic: An Intercomparison of Observations and Reanalyses by Alexander Chernokulsky, Igor I. Mokhov

    Published 2012-01-01
    “…Total cloud fraction over the Arctic (north of 60°N) has been evaluated and intercompared based on 16 Arctic cloud climatologies from different satellite and surface observations and reanalyses. …”
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    Article
  5. 1425

    An Alternating Variable Step-Size Adaptive Long-Range Prediction of LMS Fading Signals by Xi Liao, Rui Xue, Dan-feng Zhao, Yang Wang

    Published 2015-02-01
    “…Firstly, we establish the Gilbert-Elliot channel model based on first-order Markov chain for satellite communication downlink and take advantage of smoothing average to obtain channel observed values. …”
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    Article
  6. 1426

    On the Performance of a Real‐Time Electron Radiation Belt Specification Model by Frances Staples, Adam Kellerman, Janet Green

    Published 2024-12-01
    “…Abstract Maintaining accurate real‐time hindcast and forecast specification of the radiation environment is essential for operators to monitor and mitigate the effects of hazardous radiation on satellite components. The Radiation Belt Forecasting Model and Framework (RBFMF) provides real‐time forecasts and hindcasts of the electron radiation belt environment, which are used as inputs for the Satellite Charging Assessment Tool. …”
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    Article
  7. 1427

    Characterization of paleodrainages in desert regions of Saudi Arabia multisatellite images with field based study by Mashael M. Al Saud

    Published 2025-02-01
    “…This study investigated these features primarily based on the integration of multi-satellite images including SRTM DEM for generating stream networks, ALOS-PALSAR which is capable to penetrate the surficial materials, and ASTER for detecting thermal differentiation in terrain surface. …”
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  8. 1428

    Statistical Characterization of GITM Thermospheric Horizontal Winds in Comparison to GOCE Estimations by Daniel A. Brandt, Aaron J. Ridley

    Published 2022-03-01
    “…The mechanisms and drivers that underlie the physics of thermospheric horizontal winds remain under investigation and, to date, no comprehensive statistical study between thermospheric winds generated by a physics‐based atmospheric model and those retrieved from satellite measurements has been performed. Comparisons between cross‐track horizontal winds from a 10‐month run of Global Ionosphere‐Thermosphere (GITM) and those derived from the Gravity field and steady‐state Ocean Circulation Explorer (GOCE) satellite show that GITM did best modeling horizontal winds in the polar zone but overestimated horizontal wind speeds at midlatitudes just outside of the equatorial ionization anomaly region. …”
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  9. 1429

    The Error of Global Ionospheric Map‐TEC During Equatorial Plasma Bubble Event in the High Solar Activity Year by Long Tang, Fenkai Zhang, Wu Chen

    Published 2024-06-01
    “…The frequently‐used assessment parameter of ionospheric TEC model, namely difference of Slant TEC (difference of slant total electron content (dSTEC)) is checked and employed based on eight global navigation satellite system (GNSS) stations distributed around the geomagnetic equator during the high solar activity year of 2014. …”
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    Article
  10. 1430
  11. 1431

    GA-ARMA Model for Predicting IGS RTS Corrections by Mingyu Kim, Jeongrae Kim

    Published 2017-01-01
    “…The global navigation satellite system (GNSS) is widely used to estimate user positions. …”
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    Article
  12. 1432

    Comparison and Analysis of Matching patterns using Simulation with Subsurface Navigation Approach Based on Magnetic Maps by Ali Hasankhani

    Published 2024-03-01
    “…Today, the widespread use of satellite equipment to determine the location of objects or persons is done in a commercial and common way. …”
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    Article
  13. 1433

    Inland Water Body Fraction Map for Canada and Adjacent Regions at 250-m Spatial Resolution by Shaheen Ghayourmanesh, Alexander P. Trishchenko, Calin Ungureanu

    Published 2025-12-01
    “…This dataset provides a more precise and up-to-date tool for medium-resolution studies of surface inland water in Canada, aligning closely with satellite imagery of similar spatial resolution. The dataset is freely available through the Government of Canada’s Open Government Portal.…”
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  14. 1434
  15. 1435

    The Social Return on Investment in programs designed for young people living with a family member who experiences mental health challenges: study protocol by Andrea Erika Reupert, Nerelie Claire Freeman, Nivedita Nandakumar, Rochelle Hine, Rebecca Cain, Kim Foster

    Published 2025-01-01
    “…The purpose of this paper is to describe the protocol for the evaluation of programs offered by the Satellite Foundation, designed for, and with, children and young people aged between 8 and 25 years who have family members experiencing mental health challenges. …”
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    Article
  16. 1436

    Measuring and modelling functional moat area in perennially ice-covered Lake Fryxell, Antarctica by Michael S. Stone, Mark R. Salvatore, Hilary A. Dugan, Madeline E. Myers, Peter T. Doran

    Published 2024-12-01
    “…Finally, we developed a predictive model based on readily available climate data, allowing moat area to be predicted beyond the limits of the satellite-based records. We found that functional moat area varies annually, potentially influencing ecosystem processes in the moats.…”
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  17. 1437

    Vehicle positioning systems in tunnel environments: a review by Suying Jiang, Qiufeng Xu, Wei Wang, Peng Peng, Jiachun Li

    Published 2025-01-01
    “…In the tunnel, the positioning accuracy of Global Navigation Satellite System (GNSS) decreases due to blocked satellite signals. …”
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  18. 1438

    UAV Localization Method with Keypoints on the Edges of Semantic Objects for Low-Altitude Economy by Yineng Li, Qinghua Zeng, Chen Shao, Peng Zhuo, Bowen Li, Kecheng Sun

    Published 2024-12-01
    “…The localization accuracy of UAVs highly relies on the Global Navigation Satellite System (GNSS), which can be easily affected in low-altitude urban environments, making it difficult to maintain effective localization accuracy. …”
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    Article
  19. 1439

    Exploring the feasibility of GF1-WFV data in estimating SPAD using spatiotemporal fusion algorithms by Annan Zeng, Jianli Ding, Jinjie Wang, Lijing Han, Haiyan Han, Shuang Zhao, Xiangyu Ge

    Published 2025-05-01
    “…Given the challenges associated with satellite image quality and spatiotemporal resolution, spatiotemporal fusion algorithms for estimating vegetation chlorophyll content have garnered significant attention in recent years. …”
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    Article
  20. 1440

    Separation algorithm of paired carrier multiple access based on independent component analysis by WAN Jian, XU Hua, ZHU Zhong-liang

    Published 2006-01-01
    “…Based on the introduction of paired carrier multiple access(PCMA)technology,a new algorithm was proposed to separate the satellite PCMA downlink mixed signals with independent component analysis(ICA).The new algorithm utilized maximum negentropy as the separating criterion which could overcome the limitation that the power of two up-link signals could not be different too much.The computer simulations testified the validity of the algorithm.…”
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