1The sun
ContentsOn Oct 6 the noon sun stands 53 degrees above the horizon at 31.64 N, and the day is 11 h 34 min long. Level ground there takes 80 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.
