File:NRAO Calibration Horn Antenna (1967).jpg
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[edit]DescriptionNRAO Calibration Horn Antenna (1967).jpg |
English: The Calibration Horn Antenna, nicknamed the “Little Big Horn,” at Green Bank. As its name implies, this 120-foot long horn antenna was used to measure the intensity of radio waves coming from the sky’s strongest non-solar radio source, Cassiopeia A. The Calibration Horn measured a total power output for Cas A at a frequency of 1.4 GHz (a wavelength of 20cm), and thus provided astronomers with a standard reference point on the sky against which they could measure other sources. |
Date | |
Source | https://public.nrao.edu/gallery/little-big-horn/ |
Author | NRAO/AUI/NSF |
Permission (Reusing this file) |
NRAO Image Use Policy [1] |
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[edit]This file is licensed under the Creative Commons Attribution 3.0 Unported license.
Attribution: NRAO/AUI/NSF
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 12:51, 5 May 2021 | 1,920 × 1,485 (1.43 MB) | Sv1xv (talk | contribs) | Uploaded a work by NRAO/AUI/NSF from https://public.nrao.edu/gallery/little-big-horn/ with UploadWizard |
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- User:Sv1xv
- File:Gallery-images-largeCalibration-Horn-1967 large.jpg (file redirect)
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Width | 1,526 px |
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Height | 1,180 px |
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Pixel composition | RGB |
Orientation | Normal |
Number of components | 3 |
Horizontal resolution | 72 dpi |
Vertical resolution | 72 dpi |
Software used | Adobe Photoshop CS6 (Macintosh) |
File change date and time | 09:17, 11 June 2013 |
Exif version | 2.21 |
Color space | sRGB |
Unique ID of original document | xmp.did:E7426E2D0B2068118083B3C20E733AFD |
Date metadata was last modified | 05:17, 11 June 2013 |
Date and time of digitizing | 05:41, 23 May 2013 |