Quote:
Originally Posted by AdrianF
If I set the points on the ground showing N-S & E-W using the solar noon method are they accurate all year round or do they have to be reset occasionally?
Adrian
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Not counting earthmoving machinery, landslides or earthquakes moving your markers, or continental drift moving the whole country it will remain correct.
You might repeat the process for a few days with semi-permanent marks and average out any discrepencies before making them permanent.
Winter gives longer shadows so might work better than summer.
It's not vital they be exact. They just make it easier to plonk the mount down in exactly the same place every time, to minimise the amount of fine adjustment you have to do.