File:Anthorn comms masts - geograph.org.uk - 125140.jpg
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[edit]DescriptionAnthorn comms masts - geograph.org.uk - 125140.jpg |
English: Anthorn VLF antenna masts. A view looking south towards the transmitter building and the masts supporting the huge wire triatic antenna of the very low frequency (VLF) naval radio transmitter at Anthorn Radio Station, Anthorn, UK, used by the British Navy to communicate with submerged submarines. This facility was actually under the command of NATO, and in a nuclear war would be used to transmit missile launch orders to ballistic missile submarines. It transmits on 19.6 kHz with a callsign of GQD with output power of hundreds of kilowatts. The antenna consists of 6 vertical wire radiators surrounding the central mast (the second of the 3 masts visible in center), attached to 6 half-mile long rhombic-shaped horizontal multiwire toploads. These extend at angles of 60° from the central mast, supported by 12 surrounding masts, giving the antenna the shape of a snowflake when viewed from above. The entire antenna is more than a mile in diameter. |
Date | |
Source | From geograph.org.uk |
Author | Phil Williams |
Attribution (required by the license) InfoField | Phil Williams / Anthorn comms masts / |
InfoField | Phil Williams / Anthorn comms masts |
Camera location | 54° 54′ 40″ N, 3° 17′ 38″ W | View this and other nearby images on: OpenStreetMap | 54.911200; -3.294000 |
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Object location | 54° 54′ 44″ N, 3° 16′ 41″ W | View this and other nearby images on: OpenStreetMap | 54.912200; -3.278000 |
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Licensing
[edit]This image was taken from the Geograph project collection. See this photograph's page on the Geograph website for the photographer's contact details. The copyright on this image is owned by Phil Williams and is licensed for reuse under the Creative Commons Attribution-ShareAlike 2.0 license.
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This file is licensed under the Creative Commons Attribution-Share Alike 2.0 Generic license.
Attribution: Phil Williams
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Date/Time | Thumbnail | Dimensions | User | Comment | |
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current | 19:13, 24 December 2011 | 480 × 640 (65 KB) | Rotatebot (talk | contribs) | Bot: Reset EXIF-specified Orientation of image (EXIF-Orientation set from 6 to 1, rotated 0°) | |
02:12, 31 January 2010 | 640 × 480 (65 KB) | GeographBot (talk | contribs) | == {{int:filedesc}} == {{Information |description={{en|1=Anthorn comms masts. A view looking south towards the transmitter building and the masts supporting the VLF aerial array at Anthorn. }} |date=2006-02-13 |source=From [http://www.geograph.org.uk/phot |
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Camera manufacturer | Canon |
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Camera model | Canon PowerShot A85 |
Exposure time | 1/15 sec (0.066666666666667) |
F-number | f/2.8 |
Date and time of data generation | 16:56, 13 February 2006 |
Lens focal length | 5.40625 mm |
Orientation | Normal |
Horizontal resolution | 180 dpi |
Vertical resolution | 180 dpi |
File change date and time | 16:56, 13 February 2006 |
Y and C positioning | Centered |
Exif version | 2.2 |
Date and time of digitizing | 16:56, 13 February 2006 |
Meaning of each component |
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Image compression mode | 3 |
APEX shutter speed | 3.90625 |
APEX aperture | 2.96875 |
APEX exposure bias | 0 |
Maximum land aperture | 2.96875 APEX (f/2.8) |
Metering mode | Pattern |
Flash | Flash did not fire, compulsory flash suppression |
Supported Flashpix version | 1 |
Color space | sRGB |
Focal plane X resolution | 10,819.047619048 |
Focal plane Y resolution | 10,784.810126582 |
Focal plane resolution unit | inches |
Sensing method | One-chip color area sensor |
File source | Digital still camera |
Custom image processing | Normal process |
Exposure mode | Auto exposure |
White balance | Auto white balance |
Digital zoom ratio | 1 |
Scene capture type | Standard |