Is there a guide to atmosphereic density by elevation?
For example, we know that having less atmosphere between you and the stars will enable higher resolution views (seeing dependent, of course).
But under the same conditions, how much better will the seeing be at, say, 300m compared to sea level? Or even 700m? These are elevations that are typically achievable in Australia, but I guess overseas, maybe people can be observing at up to 3,000m?
I figure (apart from the typical weather fluctuations) that the atmospheric pressure is higher, the closer to sea level you are. So, is there a way of measuring how much better off you are at elevation? What is the half-way point, where there is just as much atmosphere below you as above?
Any smart meteorological types out there?
Markus
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