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I am Pierre Brunet from ANPCN
My presentation will show you what can be expected from a
digital camera for showing light pollution domes
extension and intensity.
The superiority of a
digital camera over a film camera is the more linear response
to light intensity, that gives way to quantitative information.
But at this time, my presentation is restricted to a qualitative
exploitation. Well, more or less, as you will see.
Here is the content.
After exposing the way the night sky pictures are acquired, I
will show you what kind of information may be derived
from them. Especially if there is some correlation
between these field recordings, and the Cinzano Atlas of the artificial night sky brightness.
We’ll
see also in any improvement in the sky transparency may be expected with the night hour, the season in the year, or the meteorological
conditions.
When recording night
sky photographs there are a few purposes we are looking
for :
•To show how light pollution intensity
compares to the stars light. The higher is the light
pollution intensity, the lesser are the stars we can see. Astronomers knows that for a long time. In fact, it is quite easy to evaluate
the loss in stars for a given artificial/natural night
sky brightness rati
•Another purpose may be
to map the extent of the light pollution domes above the
horizon.
•To show how light pollution domes compare
between themselves. In fact it is a powerful way to
compare