[amsat-bb] Re: Math Help - maybe OT

[psschwarz@xxxxxxxxxxx]

Hi Ron. I'm not quite sure what you are seeking to accomplish. Could you be 
a little more clear? Can you give an example? 

Patrick...KB8RTZ... 

Ron Sparks AG5RS writes: 

> 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
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