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See also the IR D2 Meteosat movie.
The IAC weather page has many useful links, e.g. to the Dundee Satellite Receiving Station (you need to register, but it's free).
Atmospheric Extinction:
Click
here
for ~ half-hourly measurements of site extinction from
the Mercator telescope,
and
here
for the nightly record of extinction
measured at the Carlsberg Automatic Meridian Circle.
Atmospheric extinction above the observatory on La Palma is typically 0.12 mag in V band, and varies with wavelength . During July, August, September, a pall of neutral-extinction ('grey') dust hangs over the islands, and the total extinction may be as high as 1 mag. The summers 1996 and 1997 were notably less dusty than their predecessors, see plot.
Sky Brightness:
The median sky brightness above La Palma at high elevation, high galactic latitude
and high ecliptic latitude, at sunspot minimum, is B = 22.7, V = 21.9, R = 21.0,
rms 0.1 mag/arcsec^2, similar to that at other dark sites. Click
here for further details.
Seeing & Image Quality:
Information on the 'seeing' characteristics of the La Palma site can be found on the
Seeing pages.
Further Links:
Lightning map,
Sunspot index,
Space weather,
Meteor showers,
Moonlight diagrams &
Lunar phase tonight.
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