On Sun, 2009-10-18 at 19:27 -0700, L Knauth wrote: > The sky was clear but bright for some reason; the best meter > reading was 21.3. I'm pretty sure the night airglow has been in a high state recently. I got similar 'bright' SQM values all night last week at Anderson Mesa. The data are shown at my nighttime cloudiness page: http://www.lowell.edu/Research/cloudiness_data/clouds.html See the list at the bottom of the report for October 2009. \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.