Next message: Alexandre E Eremenko: "Re: Anomalous dip. was: [NAV-L] Testing pocket sextant."
Alex wrote:
"I did. I found no talk on anomalous refraction,
and Frank was apparently satisfied with his observation
(based on the difference of height of two Chicago buildings).
I found the beginning of this trend on October 10.
Am I missing something?"
Yes. See January. Or... go through any of my posts in the past nine months
referencing "dip" and/or "Chicago buildings" in the subject.
The calculation of anomalous dip is directly connected with terrestrial
refraction which, to first order, is a simple function of the atmospheric lapse
rate. It's fun stuff, and I would be happy to chat about it at some length
(you can express everything in terms of a variable radius for the Earth!), but
unfortunately I am very busy this weekend. Strike that... make it "FORTUNATELY
I am very busy this weekend".
-FER
42.0N 87.7W, or 41.4N 72.1W.
www.HistoricalAtlas.com/lunars
