Max radiation for lat/date

Mikeym see this thread

There was a bug with february not calculating the julian date correctly (march is OK) plus I think Brian has a problem with the solarnoon calculation needed. At present this gives you a lower reading first thing in the day than it should by quite a long way, it will get better the longer you leave it today.

Need to see what Brian thinks when he gets up in the morning (NZ time).