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Clicking on a camera site displayed on the map will open
up a page displaying the most recent images available from
that site, and the latest observations of temperature, pressure,
visibility, wind and weather (if available). If you have viewed
the page before it may be necessary to hold down the SHIFT
key whilst clicking the reload/refresh icon in order to obtain
the most up to date series. Click on the graph icon at the
bottom of the page to see time-series graphs of observation
data for the last 24 hours.
The cameras are programmed to scan every 30 minutes and record
images every 52°. Scans are made at elevations of 0°, 45°,
and 80° - thus a series of images, covering the celestial
dome, is collected.
Hyperlinks are set every 104° on the thumbnail presentation
which, when selected, open up a 156° 'sector' of the globe.
The field of view of each camera is approximately 60° and
overlaps between thumbnail images are apparent - hence, it
is possible for the same area to be visible in possibly four
adjoining images. For this reason the series of thumbnails
should strictly be considered as an index, rather than a panorama.
Clicking on any of the thumbnails will enlarge that image
for closer scrutiny.
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