Re: Hc formula difference why?
From: Herman Dekker
Date: 2017 Nov 23, 02:52 -0800
Thanks for the info. Just one formula.
I know now I only have to remember
Hc=arcSin(Cos Ldt+Sin Ld) (ik write then of course CosLdt is Cos L•Cos d•Cos t etc.)
if L and d are contrary use -d