检索结果-内蒙古大学图书馆

74th International Astronautical Congress, IAC 2023

作者： Lee, Hyeon-Cheol Moon, Sangman Cho, Young Ho Kim, dae-Kwan Heo, Haeng-Pal Satellite Payload Research & Development Division Korea Aerospace Research Institute 169-84 Gwahak-ro Yuseong-gu Daejeon34133 Korea Republic of Satellite & Space Exploration Systems Engineering and Architecture R&D Division Korea Aerospace Research Institute 169-84 Gwahak-ro Yuseong-gu Daejeon34133 Korea Republic of Future Innovation Research Center Korea Aerospace Research Institute 169-84 Gwahak-ro Yuseong-gu Daejeon34133 Korea Republic of

A rep. of Korea's first lunar orbiter, Korea Pathfinder Lunar Orbiter (KPLO), launched on August 5, 2022, cruised along its Ballistic Lunar Transfer (BLT) orbit for 4.5 months before successfully entering the Moon trajectory on december 17, 2022. Currently, the observation mission is scheduled to be carried out by december 2022 (can be extended to one more year) as it travels around the Moon every two hours, and various data observed from six payloads are being transmitted to the Earth. In this paper, it was identified that the KPLO's X-band transmitter (XTXU) affects the receiver according to the drift and drift rate of the transmitting center frequency (Fc) when transmitting observation data to the Earth's deep space antenna, and its impact was analysed by the orbits of cruise and mission phases. As a result, the drift rate in the cruise phase was small at 13 Hz/s, so the NASA's deep space Network (dSN) receivers and the Korea deep space Antenna (KdSA) receiver contacted the KPLO easily and received it well. However, in the mission phase, the drift rate increased up to 50 Hz/s and fluctuated twice a month due to the doppler frequency, stabilized after NASA adjusted window size of the symbol rate of dSN. On the other hand, unlike dSN, the KdSA receiver automatically matched the frequency change and received it well without changing the set value. Copyright © 2023 by the International Astronautical Federation (IAF). All rights reserved.

关键词： BLT drift rate dSN KdSA KPLO XTXU

来源：评论

学校读者我要写书评

暂无评论

GLOBAL CLIMATE

引用

Bulletin of the American Meteorological Society 2024年第8期105卷 S12-S155页

作者： dunn, r.J.H. Blannin, J. Gobron, N. Miller, J.B. Willett, K.M. Met Office Hadley Centre Exeter United Kingdom European Commission Joint Research Centre Ispra Italy NOAA Global Monitoring Laboratory Boulder Colorado European Centre for Medium-Range Weather Forecasts Reading United Kingdom University of Maryland College Park Maryland European Centre for Medium-Range Weather Forecasts Bonn Germany Department of Meteorology and National Centre for Earth Observation University of Reading Reading United Kingdom Hampton University Hampton Virginia National Research Institute for Agriculture Food and Environment (INRAE) CARRTEL Université Savoie Mont Blanc Thonon les Bains France Graduate School of Agriculture Osaka Metropolitan University Sakai Japan NOAA/NESDIS National Centers for Environmental Information Asheville North Carolina Science Faculty Universidad Nacional de Colombia Bogotá Colombia University of Bremen Bremen Germany Centro de Investigaciones sobre Desertificación – Spanish National Research Council (CSIC-UV-GVA) Valencia Spain Hydro-Climate Extremes Lab (H-CEL) Ghent University Ghent Belgium Laboratoire des Sciences du Climat et de l’Environnement (LSCE) LSCE/IPSL CEA-CNRS-UVSQ Gif-sur-Yvette France Instituto de Geografía Pontificia Universidad Católica de Valparaíso Valparaíso Chile Physical Science and Engineering Division King Abdullah University of Science and Technology Thuwal Saudi Arabia University of Reading Reading United Kingdom Institute Pierre Simon Laplace (IPSL) Guyancourt France School of Engineering Newcastle University Newcastle-upon-Tyne United Kingdom Université Paris Cité Institut de physique du globe de Paris CNRS IGN F-75005 Paris France Univ Gustave Eiffel ENSG IGN F-77455 Marne-la-Vallée France Laboratoire EDYTEM CNRS/Université Savoie Mont-Blanc Le Bourget-du-Lac France Global Modeling and Assimilation Office NASA Goddard Space Flight Center Greenbelt Maryland Universität Hamburg Hamburg Germany Climate Dynamics Lab University of St Andrews St Andrews United Kingdom Ea

来源：评论

学校读者我要写书评

暂无评论

INTrOdUCTION

引用

Bulletin of the American Meteorological Society 2024年第8期105卷 S1-S11页

作者： Boyer, T. Blunden, J. dunn, r.J.H. NOAA/NESDIS National Centers for Environmental Information Silver Spring Maryland NOAA/NESDIS National Centers for Environmental Information Asheville North Carolina Met Office Hadley Centre Exeter United Kingdom European Centre for Medium-Range Weather Forecasts Reading United Kingdom University of Maryland College Park Maryland Scripps Institution of Oceanography University of California San Diego La Jolla California NOAA/NWS National Centers for Environmental Prediction Climate Prediction Center College Park Maryland Brandenburg University of Technology (BTU) Cottbus-Senftenberg Germany Servicio Meteorológico Nacional Buenos Aires Argentina NOAA/OAR Physical Sciences Laboratory Boulder Colorado European Centre for Medium-Range Weather Forecasts Bonn Germany Center for Geophysical Research and School of Physics University of Costa Rica San José Costa Rica Department of Meteorology and National Centre for Earth Observation University of Reading Reading United Kingdom Centro Nacional de Monitoramento e Alertas de Desastres Naturais CEMADEN São Paulo Brazil Université Grenoble Alpes Institut des Géosciences de l’Environnement IRD CNRS Grenoble INP Grenoble France Hampton University Hampton Virginia Seychelles Meteorological Authority Mahe Seychelles Section for Glaciers Ice and Snow Norwegian Water Resources and Energy Directorate Oslo Norway National Research Institute for Agriculture Food and Environment (INRAE) CARRTEL Université Savoie Mont Blanc Thonon les Bains France Graduate School of Agriculture Osaka Metropolitan University Sakai Japan Science Faculty Universidad Nacional de Colombia Bogotá Colombia University of Bremen Bremen Germany NOAA Global Monitoring Laboratory Boulder Colorado Servicio Nacional de Meteorología e Hidrología del Perú Lima Perú Centro de Investigaciones sobre Desertificación – Spanish National Research Council (CSIC-UV-GVA) Valencia Spain Hydro-Climate Extremes Lab (H-CEL) Ghent University Ghent Belgium Department o

In 2023, La Niña conditions that generally prevailed in the eastern Pacific Ocean from mid-2020 into early 2023 gave way to a strong El Niño by October. Atmospheric concentrations of Earth’s major greenhouse gases—carbon dioxide, methane, and nitrous oxide—all increased to record-high levels. The annual global average carbon dioxide concentration in the atmosphere rose to 419.3±0.1 ppm, which is 50% greater than the pre-industrial level. The growth from 2022 to 2023 was 2.8 ppm, the fourth highest in the record since the 1960s. The combined short-term effects of El Niño and the long-term effects of increasing levels of heat-trapping gases in the atmosphere contributed to new records for many essential climate variables reported here. The annual global temperature across land and oceans was the highest in records dating as far back as 1850, with the last seven months (June–december) having each been record warm. Over land, the globally averaged temperature was also record high. dozens of countries reported record or near-record warmth for the year, including China and continental Europe as a whole (warmest on record), India and russia (second warmest), and Canada (third warmest). Intense and widespread heatwaves were reported around the world. In Vietnam, an all-time national maximum temperature record of 44.2°C was observed at Tuong duong on 7 May, surpassing the previous record of 43.4°C at Huong Khe on 20 April 2019. In Brazil, the air temperature reached 44.8°C in Araçuaí in Minas Gerais on 20 November, potentially a new national record and 12.8°C above normal. The effect of rising temperatures was apparent in the cryosphere, where snow cover extent by June 2023 was the smallest in the 56-year record for North America and seventh smallest for the Northern Hemisphere overall. Heatwaves contributed to the greatest average mass balance loss for Alpine glaciers around the world since the start of the record in 1970. due to rapid volume loss beginning in 2021, St. A

关键词：

来源：评论

学校读者我要写书评

暂无评论

The impact and recovery of asteroid 2018 LA

arXiv

引用

arXiv 2021年

作者： Jenniskens, Peter Gabadirwe, Mohutsiwa Yin, Qing-Zhu Proyer, Alexander Moses, Oliver Kohout, Tomas Franchi, Fulvio Gibson, roger L. Kowalski, richard Christensen, Eric J. Gibbs, Alex r. Heinze, Aren denneau, Larry Farnocchia, davide Chodas, Paul W. Gray, William Micheli, Marco Moskovitz, Nick Onken, Christopher A. Wolf, Christian devillepoix, Hadrien A.r. Ye, Quanzhi robertson, darrel K. Brown, Peter Lyytinen, Esko Moilanen, Jarmo Albers, Jim Cooper, Tim Assink, Jelle Evers, Läslo Lahtinen, Panu Seitshiro, Lesedi Laubenstein, Matthias Wantlo, Nggie Moleje, Phemo Maritinkole, Joseph Suhonen, Heikki Zolensky, Michael E. Ashwal, Lewis Hiroi, Takahiro Sears, derek W. Sehlke, Alexander Maturilli, Alessandro Sanborn, Matthew E. Huyskens, Magdalena H. dey, Supratim Ziegler, Karen Busemann, Henner riebe, My E.I. Meier, Matthias M.M. Welten, Kees C. Caffee, Marc W. Zhou, Qin Li, Qiu-Li Li, Xian-Hua Liu, Yu Tang, Guo-Qiang McLain, Hannah L. dworkin, Jason P. Glavin, daniel P. Schmitt-Kopplin, Philippe Sabbah, Hassan Joblin, Christine Granvik, Mikael Mosarwa, Babutsi Botepe, Koketso SETI Institute 189 Bernardo Avenue Mountain ViewCA94043 United States NASA Ames Research Center Moffett FieldCA94035 United States Botswana Geoscience Institute Plot 11566 Khama 1 Avenue Private Bag 0014 Lobatse Botswana Department of Earth and Planetary Sciences University of California Davis One Shields Avenue CA95616 United States Botswana International University of Science and Technology Private Bag 16 Palapye Botswana Department of Geosciences and Geography University of Helsinki P. O. Box 64 HelsinkiFI-00014 Finland Ursa Finnish Fireball Network Kopernikuksentie 1 HelsinkiFI-00130 Finland School of Geosciences University of the Witwatersrand P.O. WITS Johannesburg2050 South Africa Catalina Sky Survey Lunar & Planetary Laboratory University of Arizona 1629 E University Blvd. TucsonAZ85721 United States ATLAS Institute for Astronomy 2680 Woodlawn Drive HonoluluHI96822-1839 United States Jet Propulsion Laboratory California Institute of Technology 4800 Oak Grove Drive PasadenaCA91109 United States Project Pluto 168 Ridge Road BowdoinhamME04008 United States ESA NEO Coordination Centre Largo Galileo Galilei 1 FrascatiI-00044 Italy Lowell Observatory 1400 W. Mars Hill Rd. FlagstaffAZ86001 United States Research School of Astronomy and Astrophysics Australian National University CanberraACT2611 Australia School of Earth and Planetary Sciences Curtin University PerthWA6845 Australia Department of Astronomy University of Maryland College ParkMD20742 United States Division of Physics Mathematics and Astronomy Caltech PasadenaCA91125 United States NASA Ames Research Center Asteroid Threat Assessment Project Mail Stop 239-1 Moffett FieldCA94035 United States Centre for Planetary Science and Exploration Western University LondonONN6A 5B7 Canada Astronomical Society of Southern Africa Suite 617 Private Bag X043 Benoni1500 South Africa Royal Dutch Meteorological Institute R&D Seismology and Acoustics P. O. Box 201

来源：评论

学校读者我要写书评

暂无评论

26th Annual Computational Neuroscience Meeting (CNS*2017) of the Organization for Computational Neuroscience Antwerp, Belgium, July 15-20, 2017

引用

BMC NEUrOSCIENCE 2017年第SUPPL 1期18卷 59-59页

作者： [Anonymous] Indiana University Purdue University Indianapolis Indianapolis IN 46032 USA Stark Neurosciences Research Institute Indiana University School of Medicine Indianapolis IN 46032 USA Department of Mathematics East Carolina University Greenville NC 27858 USA Jülich Supercomputing Centre Forschungszentrum Jülich 52425 Jülich Germany Future Systems Swiss National Supercomputing Centre 8092 Zurich Switzerland User Engagement and Support Swiss National Supercomputing Centre 6900 Lugano Switzerland Institut de Neurosciences des Systèmes Aix Marseille Univ 13005 Marseille France Simulation Lab Neuroscience Forschungszentrum Jülich Jülich Germany Department of Experimental Psychology Ghent University 9000 Ghent Belgium Donders Center for Cognitive Neuroimaging Radboud University 6525HR Nijmegen The Netherlands Department of Electrical Computer and Energy Engineering University of Colorado Boulder CO 80309 USA Department of Neurosurgery Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Neurology Johns Hopkins School of Medicine Baltimore MD 21287 USA Department of Otolaryngology Johns Hopkins School of Medicine Baltimore MD 21287 USA INSERM U968 Paris France Sorbonne Universités UPMC University Paris 06 UMR_S 968 Institut de la Vision Paris France CNRS UMR_7210 Paris France Department of Computer Architecture and Technology University of Granada (CITIC) Granada Spain Sorbonne Universités UPMC Univ Paris 06 INSERM CNRS Institut de la Vision Paris France Department of Adaptive Machine Systems Osaka University Osaka Japan Department of Computer Science University of Cergy-Pontoise Cergy-Pontoise France Department of Physics and Astronomy College of Charleston Charleston SC 29424 USA School of Physics Faculty of Science University of Sydney Sydney NSW 2006 Australia Center of Excellence for Integrative Brain Function Australian Research Council Sydney Australia Max Planck Institute for Human Cognitive and Brain Sciences Saxony Lei

来源：评论

学校读者我要写书评

暂无评论

architecture ANd NETWOrKING ISSUES IN satellite systems FOr PErSONAL COMMUNICATIONS

引用

INTErNATIONAL JOUrNAL OF satellite COMMUNICATIONS 1994年第1期12卷 33-44页

作者： ANANASSO, F CArOSI, M Received the Electronics and Electrical Communications Degree from the University of Rome in 1973 after which he joined Selenia S.p.A (Rome) as a microwave designer in the Development Laboratory. He was involved in several military and civilian projects concerning microwave subsystems for Radar Avionics and Satellite Communications equipment. In 1981 he joined Telespazio S.p.A. (Rome) as Section Chief in the Space and Advanced Programs Division with responsibilities related to satellite payload and digital transmission channel design. In 1987 he was appointed Associate Professor of Digital Signal Processing at the University of Rome Tor Vergata Electronics Engineering Department. In 1990 he again joined Telespazio where he is now Director of the Advanced Studies and Experimentations Division. He has performed a number of studies for National and International Organizations including ESA EUTELSAT INMARSAT and INTELSAT is author of a Radio Systems book a Chapter (‘Digital transmission channel’) of the ‘Satellite Communication System Design’ book by Plenum Publishing (1993) and over 80 technical papers on communication systems and technology. Received the Electronics and Electrical Communications Degree from the University ‘La Sapienza’ of Rome Italy in 1987. From 1987 to 1990 he worked as a Research Engineer in the INFOCOM department of the University ‘La Sapienza’ of Rome carrying out research on design and performance evaluation of multiple access protocols particularly in the metropolitan area network and in the satellite fields. Since 1990 he has been working in the System Studies and Payload group of Telespazio S.p.A. Rome Italy. He is currently involved in projects sponsored by the European Space Agency and by INMARSAT for communications systems via satellite for mobiles both at study and R&D level. Mr Carosi is a member of the IEEE Communication Society.

The paper expands on some specific aspects of personal communications via satellite, often-although not necessarily-envisaging extensive use of 'small' satellites, using orbits not necessarily coinciding with the geostationary one (36,000 km), but rather at 1000-11,000 km altitude. One key point to be borne in mind is the issue of internetworking between satellite and terrestrial systems. Network integration should be carefully implemented in order to comply with ITU future public land mobile telecommunication systems (FPLMTS) requirements, also accepted in the European Telecommunication Standards Institute (ETSI) universal mobile telecommunication systems (UMTS). In addition to some insight into the technology of small satellites and associated orbits, architectures and networking aspects of most relevant systems providing personal communication services (PCS) are addressed in some detail, and potential applications highlighted. Frequency spectrum allocation is addressed in the light of the 1992 World Administrative radio Conference (WArC-92), taking into account also multiple access problems and regulatory issues such as Federal Communications Commission (FCC) licensing and spectrum sharing debates. Some remarks on critical technologies and cost conclude the paper.

关键词： PErSONAL COMMUNICATIONS SMALL satelliteS NETWOrKING FrEQUENCY SPECTrUM

来源：评论

学校读者我要写书评

暂无评论

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案：

请选择收藏分类：

通借通还

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：