>> Are there known trends in seeing >> quality throughout the year at established sites up your way? There are monthly histograms at the bottom of this URL: http://www.lowell.edu/Research/NGLTbak/sitetest.html Perhaps more significant is the plot link called "polar plot of wind direction vs seeing". Basically the seeing is always good, but is less good when we get the classic post-frontal northeast wind. But as you can see, the seeing goes from ~0".8 for all directions except NE up to ~1".2 when it's from the NE. On Anderson Mesa we typically get 3"-4" or sometimes much worse with that same NE wind. From other data that's not on-line, the unnamed Happy Jack hill is a bit breezy, but that's why the seeing is as good as it is. A lot of sites get decoupled not far above ground level, so that it's calm at the surface, but producing the various cool-air drainages over the site that soften the images. This place sticks up just a bit into the prevailing westerlies, so stays breezy all night on a typical clear night. It's not a strong wind, but a good steady breeze at something like 6-8 mph, if I remember the mean values correctly. Most folks will need some sort of wind buffer to keep a small telescope stable. \Brian -- See message header for info on list archives or unsubscribing, and please send personal replies to the author, not the list.