File:ATA-gregorian.jpg
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ATA-gregorian.jpg (532 × 376 pixels, file size: 46 KB, MIME type: image/jpeg)
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DescriptionATA-gregorian.jpg |
English: Artist rendering of dish antenna of the Allan Telescope Array, a radio telescope for combined radio astronomy and SETI (search for extraterrestrial intelligence) research being built by the University of California at Berkeley, outside San Francisco. The first phase, consisting of 42 6-meter dish antennas shown here, was completed in 2007. Eventually it will have 350 antennas. This type of antenna is called an offset Gregorian design. The incoming radio waves are reflected by the large parabolic dish onto the secondary parabolic reflector in front of the dish, and then into a feed horn at the edge of the dish. It covers the frequency range from 0.5 to 11.2 GHz. |
Date | 8 June 2005 (original upload date) |
Source | Artwork by Dave Deboer Originally from en.wikipedia; description page is/was here. |
Author | Original uploader was Jcolbyk at en.wikipedia |
Permission (Reusing this file) |
Released under the GNU Free Documentation License. |
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This file is licensed under the Creative Commons Attribution-Share Alike 3.0 Unported license. Subject to disclaimers. | ||
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This licensing tag was added to this file as part of the GFDL licensing update.http://creativecommons.org/licenses/by-sa/3.0/CC BY-SA 3.0Creative Commons Attribution-Share Alike 3.0truetrue |
Permission is granted to copy, distribute and/or modify this document under the terms of the GNU Free Documentation License, Version 1.2 or any later version published by the Free Software Foundation; with no Invariant Sections, no Front-Cover Texts, and no Back-Cover Texts. A copy of the license is included in the section entitled GNU Free Documentation License. Subject to disclaimers.http://www.gnu.org/copyleft/fdl.htmlGFDLGNU Free Documentation Licensetruetrue |
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 16:23, 5 January 2009 | 532 × 376 (46 KB) | Mktopai~commonswiki (talk | contribs) | {{Information |Description={{en|1=Artist rendering of ATA Antenna, Offset Gregorian Design. Credit: Dave Deboer}} |Source=Originally from [http://en.wikipedia.org/ en.wikipedia]; description page is/was [http://en.wikipedia.org/wiki/File:ATA-gregorian.jpg |
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Orientation | Normal |
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Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop Elements 3.0 Macintosh |
File change date and time | 05:14, 8 June 2005 |
Color space | Uncalibrated |
Image width | 532 px |
Image height | 376 px |
Date and time of digitizing | 22:14, 7 June 2005 |
Date metadata was last modified | 22:14, 7 June 2005 |