Simple Solar Spectral Model for Direct and Diffuse Irradiance on Horizontal and Tilted Planes at the Earth's Surface for Cloudless Atmospheres

Table 4-1. Direct Normal Spectral Irradiance Comparison of Dave Results with SPCTRAL2 Results for a Rayleigh Atmosphere with Molecular Absorption (O3 = 0.31 atm-cm, H20 = 2.93 cm)
Z = 0° Z = 60° Z = 80°
(Ám) Dave SPCTRAL2 Dave SPCTRAL2 Dave SPCTRAL2
0.31 105.4 103.0 16.1 15.8 0.01 0.0
0.36 607.7 607.1 345.8 346.3 41.5 45.6
0.415 1299.0 1298.0 951.0 951.7 294.5 310.2
0.515 1591.0 1590.0 1381.0 1380.0 811.5 832.0
0.615 1469.0 1469.0 1334.0 1334.0 926.7 953.7
0.7035 1292.0 1291.0 1231.0 1230.0 1032.0 1042.0
0.725 1125.0 1119.0 1033.0 1028.0 793.4 803.1
0.9935 743.4 731.8 730.5 714.5 689.8 667.6
2.1 83.4 70.7 80.0 75.2 72.2 63.4


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