Quote:
Originally Posted by ausastronomer
Hi Darren,
I think looking at the Unihedron Database in all likelihood the problem could be isolated to the older type units. You may not find any issues with the newer units. I think it significant those 8 readings I mentioned would have all been taken with the older units, which is what Andrew and I have. I have repeated the high 22's readings on at least 4 different occasions (not counting Andrew's 23.45) from skies I know aren't 22+ skies, only to find the reading drops by at almost 1 mag when I put a fresh battery in.
Cheers,
John B
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Currently in our Database I think we have 3 reading over 22. The Benmore Park 22.01 reading and a reading of 23.1 in a very dark region of Scotland but with full cloud. The interesting one is the reading of 22.72 in Galloway Forest Park which is designated a dark sky park. The reading is quite a bit higher than other readings taken in the same area. The reading was taken with an SQM-L. My contact in Galloway Forest Park is investigating.
Those light pollution maps do make things look terrible here and in many places the light pollution is terrible. But it's not all bad, there are regions with little or no light pollution at all. Just not as big as your regions.