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Re: Altitudes, close to 90
From: Alexandre Eremenko
Date: 2004 Nov 29, 13:22 -0500
From: Alexandre Eremenko
Date: 2004 Nov 29, 13:22 -0500
Dear Trevor, I repeat the sentence which you seem to object: >The source of error is that you cannot determine precisely >the point on the horizon which is exactly "below" the body. Actually this is a citation from Maskelyne. I have no experience of my own in measuring altitudes above the natural horizon: unfortunately the horizon is not vizible from my observation point:-( So I can only speculate on this. I read in many places that measuring altitudes close to 90 is extremally hard, and I was trying to find a theoretical reason for this. After having posted the message "Altitudes close to 90" I noticed that my explanation was incorrect, and immediately recognized this in my next posting. Alex.
