FreeLists / az-observing / [AZ-Observing] Re: Seeing Conditions at a Dark Site

["Steve Coe" <stevecoe@xxxxxxxxx>]

Bill, et al;

I have seen excellent seeing in both flat desert sites, including my backyard 
at 7th Street and Thunderbird in Phoenix.  I do believe that these types of 
sites have good seeing more often than mountain sites.  We have found that 
sites too near a mountain get hot and cold air breezes even at midnight.  
Occasionally I have been the lucky telescope user on an excellent night with 
both good transparency and seeing, but those are rare indeed.  

I have found this:  if the wind is blowing hard then the seeing is never good, 
this often happens when the jet stream is directly over the center of Arizona.

Hope that helps;
Steve

stevecoe@xxxxxxxxx
Author:  Deep Sky Observing--The Astronomical Tourist
Saguaro Astronomy Club web site:
www.saguaroastro.org


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