1The sun
ContentsOn Oct 17 the noon sun stands 41 degrees above the horizon at 39.79 N, and the day is 10 h 56 min long. Level ground there takes 65 per cent of the noon sunlight a surface facing the sun would.
From the Field Book
FB-ENG-007, Fig. ARadiation budgetWhere the sunlight that reaches this ground goes once it arrives.
