Re: astronomical calculations

Ron Gibbs wrote:
"Ron Gibbs" <ron.gibbs@xxxxxxxxxxx> wrote in message news:47c7f237$0$521$c5fe31e7@xxxxxxxxxxxxxxxxxxxxxxx
I'm working on the design of solar collection optics, and trying to calculate the meridional and sagittal angles of the sun (for a given altitude & elevation) relative to a tilted plane. My brain hurts!

Has anyone out there (maybe working with imaging astronomical objects with a stationary optical system) done this and/or can point me towards useful texts/online resources to help with the trigonometry?

TIA
Ron
I now think I can do this, using 3D rotation matrices, and transforms
between spherical polar and cartesian coordinates.
Ron


That's how I've done it in the past. It's worth wasting a few cycles to avoid blunders.

Cheers,

Phil Hobbs
.