| 词条 | Usuda Deep Space Center |
| 释义 |
| name = Usuda Deep Space Center | image = The 64 m antenna at Usuda Deep Space Center.jpg | caption = The 64 meter antenna at the Usuda Deep Space Complex | organization = | code = | abbreviation = | location = | coordinates = {{coord|36|07|59|N|138|21|44|E|region:JP_type:landmark_source:kolossus-jawiki|display=inline,title}} | altitude = 1,456 m | weather = | established = | closed = | website = http://www.isas.jaxa.jp/about/facilities/usuda.html | telescope1_name = | telescope1_type = | telescope2_name = | telescope2_type = | telescope3_name = | telescope3_type = | telescope4_name = | telescope4_type = }} Usuda Deep Space Center is a facility of the Japan Aerospace Exploration Agency[1] It is a spacecraft tracking station opened in October, 1984. The main feature of the station is a 64-meter beam waveguide antenna.[2] Usuda was the first deep-space antenna constructed with beam-waveguide technology. Although this construction dramatically simplifies installation and maintenance of electronics, it was previously thought to offer poor noise performance.[3] However, after the U.S. Jet Propulsion Lab (JPL) tested this antenna and found the noise performance was better than its conventional 64-meter antennas,[4] it too switched to this method of construction for all subsequent antennas of their Deep Space Network (DSN). Similar huge antennas are used by the deep space networks of the USA, China, Russia, Europe, and India. Because the 64 meter antenna is getting old, JAXA is building a new antenna nearby. This antenna will be slightly smaller (54 meters in diameter) but have better surface accuracy and hence be capable of working at the higher Ka-band frequencies. This will increase the potential data throughput despite the smaller size.[5] Public Access Classification
References1. ^{{cite web |url=http://www.jaxa.jp/about/centers/udsc/index_e.html |title=Usuda Deep Space Center |publisher=JAXA}} {{JAXA Facilities}}{{radio-astronomy}}{{Use American English|date=January 2014}}{{space-stub}}2. ^{{cite journal|title=Japanese deep-space station with 64-m-diameter antenna fed through beam waveguides and its mission applications|display-authors=4|author=Hayashi, T.|author2=Nishimura, T.|author3=Takano, T.|author4=Betsudan, S.I.|author5=Koshizaka, S.|last-author-amp=yes|journal=Proceedings of the IEEE|volume=82|number=5|pages=646–657|issn=0018-9219|date=1994|publisher=IEEE|url=http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=284732|doi=10.1109/5.284732 }} 3. ^{{cite news |title = The Evolution of Technology in the Deep Space Network: A History of the Advanced Systems Program |author = Layland, J.W. |author2 = Rauch, L.L. |last-author-amp = yes |date = 1995 |publisher = National Aeronautics and Space Administration, Jet Propulsion Laboratory, California Institute of Technology |url = http://deepspace.jpl.nasa.gov/technology/95_20/95-20.pdf |pages = 5 |deadurl = yes |archiveurl = https://web.archive.org/web/20110614133812/http://deepspace.jpl.nasa.gov/technology/95_20/95-20.pdf |archivedate = 2011-06-14 |df = }} 4. ^{{cite techreport|title=Use of a 2.3-GHz Traveling-Wave Maser on the Usuda 64-Meter Antenna|author=Neff, D.|journal=TDA Progress Report 42|volume=89|pages=34–40|institution=JPL|url=http://tmo.jpl.nasa.gov/progress_report/42-89/89C.PDF }} 5. ^{{cite web |title=Toward a New Era of Deep Space Exploration: Kenji Numata, Project Manager, Ground Station for Deep Space Exploration and Telecommunication Project |url=http://global.jaxa.jp/article/2017/interview/vol98/ |publisher=JAXA |year=2017}} 2 : Space program of Japan|Space technology research institutes |
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