--- Naz_David <naz_david@msn.com> wrote: <snip> I was wondering if anyone is aware of the derivation
of R.A. and Dec drift rates for a particular location and define altitude and azimuth error on polar alignment? <snip> I'm interested in a detailed
reduction of the problem ie for a particular star, . . .
[W]hat R.A. and Dec drift should be expected for a defined polar alignment error.
Covington's online calculator http://www.covingtoninnovations.com/astro/Polar.html
. . . [F]rom an observed R.A. and Dec drift rate for a star, what polar alt-az alignment error exists?
Roger Sinnott. Sept. Sept. 1991. A Spreadsheet for Polar Alignment. Sky & Telescope. 299-301. My implementation of Sinnott's 1991 polar alignment spreadsheet from the S&T article - http://members.csolutions.net/fisherka/astronote/astromath/Polarmisalignment... I can email you Sinnott's article via private email, if you want it. Enjoy - Canopus56(Kurt) __________________________________________ Yahoo! DSL Â Something to write home about. Just $16.99/mo. or less. dsl.yahoo.com