1The sun
ContentsOn Oct 11 the noon sun stands 37 degrees above the horizon at 45.39 N, and the day is 11 h 01 min long. Level ground there takes 61 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.
