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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: U.S. Standard Atmosphere 1976
From: Paul Hirose
Date: 2005 Sep 7, 12:57 -0700
From: Paul Hirose
Date: 2005 Sep 7, 12:57 -0700
Marcel E. Tschudin wrote: > > Could it be, that in the 1976 edition they removed the lower part of the > atmosphere since there are sufficient balloon data available in this most > variing part between 0 and 30 to 40km, and left the data for the upper > parts > which seem to be more difficult to obtain (rockets, LIDAR)? In the book I don't see any explanation for the change. > Do the graphs in the 1976 supplement for heights of 40, 60 and 80km > actually > show typical temperature profiles for different latitudes? Yes, the set of three graphs (for 40, 60, 80 km) is labeled "Mean annual temperature variation with latitude." Latitude is on the horizontal axis and temperature on the vertical. The observation stations are marked on the latitude scale (Ascension, Cape Canaveral, Primrose Lake, Thule, etc.). For each station a point is plotted, and a curve drawn through the points. > Unfortunately I couldn't find some data as indicated above, when searching > under COESA. I couldn't either, but have you seen this: http://modelweb.gsfc.nasa.gov/atmos/about_atmos.html The CIRA-86 link led me to an FTP site with ASCII tables of temperature vs height & latitude for 80 S through 80 N.
