[Roger Hunter]

(02-07-2017, 06:52 AM)Skywise Wrote:

(02-06-2017, 02:56 PM)Roger Hunter Wrote:

(02-06-2017, 04:39 AM)Skywise Wrote:

Quote:Just calculate the sun angle of the cross locations at the time of the quake. This should give you an angle you can use to determine angle to the horizon, and from that decide if the location is in sunrise/set.

What angle? Sun to equator?

OK. I think I messed that up.

Compute the subsolar lat/lon at the time of the quake. Determine the distance from the subsolar point to the cross in degrees. If the cross is in sunrise/sunset this angle will be 90 degrees.

Brian

But - but that's what I've been doing!

That's not an angle anyway, it's a distance.

It's also a geocentric angle, if that's what you mean.

Roger