Re: astronomical calculations


"Phil Hobbs" <pcdh@xxxxxxxxxxxxxxxxxxxxxxxxxxxx> wrote in message
news:47C824CC.9060108@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx
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

Thanks Phil. That gives me some confidence I am on the right path, give or
take a few blunders.

Ron


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