To: atm{at}shore.net, tkrajci{at}san.osd.mil
From: mdholm{at}telerama.com
Reply-To: mdholm{at}telerama.com


Tom,

I just (literally) did some hand waving and convinced myself that you would
get less field rotation with first axis east-west rather than north-south.
It probably depends on latitude.  Below 45 degrees this may be true.  Above
45 degrees the north-south orientation would yield less rotation.  At the
equator, a north-south, alt-alt is an equatorial.  At the poles, an alt-az
is an equatorial.

No orientation other than equatorial gives no rotation.

Sorry, I don't have the equations for that transformation.

Mark Holm
mdholm{at}telerama.com

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