1The sun
ContentsOn Oct 16 the noon sun stands 49 degrees above the horizon at 31.64 N, and the day is 11 h 15 min long. Level ground there takes 76 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.
