The product Sλ⋅Δλ used for the computation of the solar direct transmittance and reflectance is given for the required wavelengths in the following (DIN 67 507):
Wavelength [nm] Sλ⋅Δλ
300 0.0050
340 0.0240
380 0.0320
420 0.0500
460 0.0650
500 0.0630
540 0.0580
580 0.0540
620 0.0550
660 0.0490
700 0.0460
740 0.0410
780 0.0370
900 0.1390
1100 0.0970
1300 0.0580
1500 0.0390
1700 0.0260
1900 0.0180
2500 0.0440