1The sun
ContentsOn Oct 11 the noon sun stands 54 degrees above the horizon at 28.32 N, and the day is 11 h 29 min long. Level ground there takes 81 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.
