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*Subject*: [amsat-bb] Math Help - maybe OT*From*: "Ron Sparks AG5RS" <rlssat1@xxxxxxxxxxxxx>*Date*: Wed, 29 May 2002 23:09:33 -0500*In-Reply-To*: <007501c205d9$cf4dcde0$6501a8c0@america>

If I have a spherical coordinate system with the equatorial great circle parallel to the floor and I want to do a rotational translation to a spherical coordinate system with its equatorial plane orthogonal (i.e., at a right angle to the floor) what equations would I use? Can I use the ones for going from a Horizon system to Dec/RA system some way? I want to avoid converting to a Cartesian system and back to spherical to minimize computational requirements and rounding errors. My hope is to be able to do the conversion in a little Excel sheet I am working on. Thanks in advance for any suggestions. Ron, AG5RS ---- Via the amsat-bb mailing list at AMSAT.ORG courtesy of AMSAT-NA. To unsubscribe, send "unsubscribe amsat-bb" to Majordomo@amsat.org

**Follow-Ups**:**Re: Math Help - maybe OT***From:*psschwarz

**References**:**Re: How many x-ray in space ?***From:*Gregory Beat

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