Showing 701 - 720 results of 1,064 for search '"low Earth orbit"', query time: 0.12s Refine Results
  1. 701

    Spatial Evolution of Energetic Electrons Affecting the Upper Atmosphere during the Last Two Solar Cycles by Alexei V. Dmitriev, Alla V. Suvorova, Sayantan Ghosh, Gennady V. Golubkov, Maxim G. Golubkov

    Published 2022-02-01
    “…Future commercial, scientific, and other satellite missions require low-Earth-orbit (LEO) altitudes of <inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>300</mn><mrow></mrow></mrow></semantics></math></inline-formula>–<inline-formula><math xmlns="http://www.w3.org/1998/Math/MathML" display="inline"><semantics><mrow><mn>400</mn><mrow></mrow></mrow></semantics></math></inline-formula> km for long-term successful space operations. …”
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  2. 702

    Exploring the Use of DSCOVR/EPIC Satellite Observations to Monitor Vegetation Phenology by Maridee Weber, Dalei Hao, Ghassem R. Asrar, Yuyu Zhou, Xuecao Li, Min Chen

    Published 2020-07-01
    “…Large-scale vegetation phenology monitoring mostly relies on Low-Earth-Orbit satellite observations with low temporal resolutions, leaving gaps in data that are important for monitoring seasonal vegetation phenology. …”
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  3. 703

    Reachable set analysis of practical trans-lunar orbit via a retrograde semi-analytic model by Bo-yong He, Sheng-gang Wu, Heng-nian Li

    Published 2023-03-01
    “…The lunar module, which includes the descent and ascent stages, flies from a low Earth orbit to the low lunar destination orbit with two tangential impulses. …”
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  4. 704

    Development of Novel Network Architectures by Ouyang Man, Liu Jiang, Liao Xinyue, Huang Tao

    Published 2022-12-01
    “…This study expounds on the implication of novel network architecture and presents several representative architectures, including information center network, expressive Internet architecture, low-Earth-orbit satellite network, service customization network, full-dimensional definable network, and multimodal network. …”
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  5. 705

    High‐resolution inverse synthetic aperture radar imaging of satellites in space by Simon Anger, Matthias Jirousek, Stephan Dill, Timo Kempf, Markus Peichl

    Published 2024-04-01
    “…Therefore, besides theoretical work, the Microwaves and Radar Institute of German Aerospace Center (DLR) has developed and constructed an experimental radar system called IoSiS (Imaging of Satellites in Space) for basic research on new concepts for the acquisition of advanced high‐resolution radar image products of objects in a low earth orbit. Based on pulse radar technology, which enables precise calibration and error correction, IoSiS has imaged space objects with a spatial resolution in the centimetre range, being novel in public perception and accessible literature. …”
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  6. 706

    Cooperative HARQ-Aided Multiple UAVs in Optical Aerospace Backhaul Networks by Khanh D. Dang, Hoang D. Le, Chuyen T. Nguyen, Anh T. Pham

    Published 2023-01-01
    “…With the growing demand for high-speed connectivity and global coverage in future 6G networks, free-space optics (FSO)-based aerospace integrated networks, incorporating low Earth orbit (LEO) satellites, high-altitude platforms (HAP), and unmanned aerial vehicles (UAV), have recently attracted research efforts worldwide. …”
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  7. 707

    Using A Sliding Window Phase Matching Method for Imaging of GNSS Radio Occultation Signals by Thomas Sievert, Joel Rasch, Anders Carlström, Vinícius Ludwig Barbosa, Mats I. Pettersson, Viet Vu

    Published 2021-03-01
    “…Signals from GNSS satellites are received in a low-Earth orbit, and they are then processed to produce bending angle profiles, from which meteorological parameters can be retrieved. …”
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  8. 708

    Hybrid-Compliant System for Soft Capture of Uncooperative Space Debris by Maxime Hubert Delisle, Olga-Orsalia Christidi-Loumpasefski, Barış C. Yalçın, Xiao Li, Miguel Olivares-Mendez, Carol Martinez

    Published 2023-07-01
    “…This paper proposed a versatile hybrid-compliant mechanism to target a vast range of small uncooperative space debris in low Earth orbit (LEO), enabling a profitable one-to-many solution. …”
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  9. 709

    Dual-Satellite Alternate Switching Ranging/INS Integrated Navigation Algorithm for Broadband LEO Constellation Independent of Altimeter and Continuous Observation by Lvyang Ye, Yikang Yang, Xiaolun Jing, Hengnian Li, Haifeng Yang, Yunxia Xia

    Published 2021-08-01
    “…For cases with only two visible satellites, we propose a dual-satellite alternate switching ranging integrated navigation algorithm based on the broadband low earth orbit (LEO) constellation, which integrates communication and navigation (ICN) technology. …”
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  10. 710

    A Unified Algorithm for the Sliding Spotlight and TOPS Modes Data Processing in Bistatic Configuration of the Geostationary Transmitter with LEO Receivers by Feng Tian, Zhiyong Suo, Yuekun Wang, Zheng Lu, Zhen Wang, Zhenfang Li

    Published 2022-04-01
    “…This paper deals with the imaging problem for sliding spotlight (SS) and terrain observation by progressive scan (TOPS) modes in bistatic configuration of the geostationary (GEO) transmitter with a low earth orbit satellite (LEO) receiver, named GTLR-BiSAR system. …”
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  11. 711

    A Deep Learning Approach to Downscale Geostationary Satellite Imagery for Decision Support in High Impact Wildfires by Nicholas F. McCarthy, Ali Tohidi, Yawar Aziz, Matt Dennie, Mario Miguel Valero, Nicole Hu

    Published 2021-03-01
    “…Our system relies on a U-Net Convolutional Neural Network (CNN) to downscale Geostationary (GEO) satellite multispectral imagery and continuously monitor active fire progression with a spatial resolution similar to Low Earth Orbit (LEO) sensors. In order to achieve this, the model trains on LEO RS products, land use information, vegetation properties, and terrain data. …”
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  12. 712

    Composite Aerosol Optical Depth Mapping over Northeast Asia from GEO-LEO Satellite Observations by Soi Ahn, Sung-Rae Chung, Hyun-Jong Oh, Chu-Yong Chung

    Published 2021-03-01
    “…Hourly AOD composites were generated (00:00–09:00 UTC, 2017) using the regression equation derived from the comparison of the composite AOD error statistics to AERONET measurements, and the results showed that the correlation coefficient and RMSE values of composite were close to those of the low earth orbit satellite products (MODIS and VIIRS). …”
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  13. 713

    Autonomous Mission Planning Method for Optical Imaging Satellites Based on Real-Time Cloud Cover Information by Zhiliang Li, Limin Zhao, Yun Liu, Xingfeng Chen, Hang Chen, Fengjie Zheng, Yunli Zhang, Donghong Wang, Jiaguo Li, Jun Liu, Shumin Liu

    Published 2022-05-01
    “…In order to solve the problem, firstly, a Geostationary Earth Orbit (GEO) and Low Earth Orbit (LEO) satellites cooperation scheme by using cloud cover information provided by GEO meteorological satellite to guide the imaging of LEO optical satellites is proposed, and the operation flow and key elements in this scheme are analyzed. …”
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  14. 714

    Dual-Band Nested Circularly Polarized Antenna Array for 5G Automotive Satellite Communications by Umais Tayyab, Ashish Kumar, Hans-Peter Petry, Muhammad Ehtisham Asghar, Matthias A. Hein

    Published 2023-10-01
    “…Currently, 5G low-earth orbit satellite communications offer enhanced wireless coverage beyond the reach of 5G terrestrial networks, with important implications, particularly for automated and connected vehicles. …”
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  15. 715

    A Review of Low-Power Electric Propulsion Research at the Space Propulsion Centre Singapore by George-Cristian Potrivitu, Yufei Sun, Muhammad Wisnuh Aggriawan bin Rohaizat, Oleksii Cherkun, Luxiang Xu, Shiyong Huang, Shuyan Xu

    Published 2020-05-01
    “…Mega-constellations of small satellites on low-Earth orbit (LEO) are proposed by many emerging commercial actors. …”
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  16. 716

    A Routing Strategy Based Genetic Algorithm Assisted by Ground Access Optimization for LEO Satellite Constellations by Peiying Zhang, Chong Lv, Guanjun Xu, Haoyu Wang, Lizhuang Tan, Kostromitin Konstantin Igorevich

    Published 2023-11-01
    “…Large-scale low Earth orbit satellite networks (LSNs) have been attracting increasing attention in recent years. …”
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  17. 717

    Robust or nonrobust: On MC-DS-CDMA acquisition in LEO satellite communications by Entong Meng, Xiangyuan Bu, Jihong Yu, Jianping An, Xuanhe Yang

    Published 2023-08-01
    “…Low Earth Orbit (LEO) satellite communications can provide global coverage in the sixth generation communication (6G) networks. …”
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  18. 718

    Design of the Angle-Resolving Electron Spectrometer Aboard the PRESET Mission by Dyer Benjamin, Cheng Xingzhi, Hanu Andrei, Byun Soo Hyun

    Published 2023-01-01
    “…We present a design study for the Pitch REsolving Spectrometer for Electron Transport (PRESET) mission, a CubeSat that is aimed at measuring the pitch angle density spectrum in low-Earth orbit (LEO). While a few missions have measured the pitch angle density spectrum, all have provided low resolution within the loss cone. …”
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  19. 719

    Rádio Ocultação GNSS: Revisão Teórica, Missões e Produtos by Gabriel Oliveira Jerez, Daniele Barroca Marra Alves, Raphael Silva Nespolo, João Francisco Galera Monico, Manuel Hernández-Pajares

    Published 2022-12-01
    “…Com o desenvolvimento do Global Navigation Satellite System (GNSS) e de missões com satélites de baixa órbita (Low Earth Orbit - LEO) surgiu a possibilidade de investigações da atmosfera terrestre com a aplicação da RO-GNSS. …”
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  20. 720

    Development and Demonstration of a Method for GEO-to-LEO NDVI Transformation by Kenta Obata, Kenta Taniguchi, Masayuki Matsuoka, Hiroki Yoshioka

    Published 2021-10-01
    “…This study presents a new method that mitigates biases between the normalized difference vegetation index (NDVI) from geostationary (GEO) and low Earth orbit (LEO) satellites for Earth observation. …”
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