A short correction to my post on Astronomy Day - I incorrectly had the impression that the atmospheric turbulence measuring box on the top of the University of Utah South Physics building was something that the Physics Department cobbled together. In surfing the web, it turns out that the box is an off the shelf commercial product made by SBIG - an SBIG seeing monitor: http://www.sbig.com/products/seeingmonitor.htm The seeing monitor houses an SBIG ST-402ME camera in a weatherproof box. To my knowlege, there is no formal characterization of the seeing over Salt Lake City. Might be a thought to ask the U Physics Department for a data file when they are done testing the box and before they move the seeing monitor to the field in central Utah. - Kurt _______________________________________________ Sent via CSolutions - http://www.csolutions.net