Solar irradiance at LWIR

Card 1

• MODEL = 2 or 3 (midlatitude summer or winter) (p.21 3.2.1)
• IEMSCT = 3
• ITYPE = 3 (slant path to space)
• IMULT = 0

CARD 3

• H1 = 0.05
• ANGLE = apparent solar zenith angle at H1
• IDAY = day of the year

The spectral output consists of the transmitted solar irradiance and the Incident solar irradiance, corrected for variations in the earth-to-sun distance according to the day or the year. Also given are the cumulative integrals of these two quantities and the total transmittance for the path from H1 to the sun.