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Table 6 Considered geographic locations and climatic data

From: Long permanence high altitude airships: the opportunity of hydrogen

  Lat. Air temperature Relative humidity Daily solar radiation* Wind speed Earth temperature
deg °C % kWh/m2/d m/s °C
Bjornoya Island 74.5 −1.3 88.3 % 1.81 7.0 3.0
Oslo 60 5.7 73.4 % 2.41 2.6 4.5
Torino 45 11.6 69.5 % 3.67 1.5 7.3
Cairo 30 21.4 58.1 % 5.38 4.0 24.5
Asmara 15 24.6 53.3 % 5.93 4.0 27.6
Singapore 0 26.7 83.3 % 4.45 1.7 26.6
  1. * Average daily solar radiation on a horizontal plane