to set up NORTH for ur Antenna use Sun North.. look at the shadow from ur vertical pole post and around Miday see where the shadow is es place a small pole at that spot now if u have it correct both shadows will be in line" taking that u plumbed the vertical poles. if not it wont be correct, Now the fiddley bit you will have to chase the shadow +/= approx 30 munites to get both shadows to line up in parrell.long poles es in our summer time is best..ur Compas is the worst way of sett'n up Antennas..way way out!!
when this happens u r as close as one can get.. ur local midday time is over a large range here in VK EAST COAST ,MIDAY IS ANY WHERE BETWEEN SYDNEY nswTO BROKENHILL. NSW