According to Sat Guy's numbers for Gal 19@97 W is Geo Azimuth at 186.9 deg aand Mag azimuth at 186.6. The number at GEOSAT finder.com is 189.9. What is this all about thanks.
It appears that the Satguys calculation is referencing an updated Magnetic Declination table. We will update the declination table next week. Quite interesting that the Magnetic Declination point really jumped a large distance in the last year! Seems that we are due for a reversal in the upcoming years, but who knows....
When you are calculating azimuth and elevation for an install, the compass reading will influenced by regional / site factors and mechanical variances in the dish assembly will account for more than the few degrees of difference in calculations....