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Thank you, George. Gracefully done. Hewitt

On 6/4/10, George Huxtable  wrote:
> Hewitt Schlereth wrote-
>
>  "I'm not sure I understand your table. It seems to say that for a given
>  declination the sunrise bearings would be different for folks in
>  different hemispheres. On any given day doesn't the sun rise in the
>  same direction, no matter whether you're looking at it from the
>  Southern hemisphere or the Northern?"
>
>
> and on 3 June, I cast some doubt on that, writing-
>
>
>  "To me, that notion of Hewitt's seemed wrong, and five minutes spent with a
>  blow-up Earth globe and a piece of string convinced me further that it was.
>  But perhaps I'm just misunderstanding what he is saying, and ask him to
>  spell it out a bit further, if he wishes to defend it."
>
>
> Some rejoinders have caused me to think again, and to repeat my tests with
>  a blowup Earth globe and a piece of string, with a bit more care. I am now
>  happy to confirm that Hewitt's statement is correct, and that I was wrong,
>  and that my tests that indicated otherwise were too crude.
>
>  On further thought, it's that very anti-symmetry in the azimuth that allows
>  such a simple table of amplitudes as its result, as long as the moment of
>  rise or fall of a body is taken to be when its centre is on the true (not
>  the apparent) horizontal.
>
>
>  contact George Huxtable, at  george@hux.me.uk
>  or at +44 1865 820222 (from UK, 01865 820222)
>  or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
>
>
>
>
>

   

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