atten_specific_annex2

pycraf.atm.atten_specific_annex2(freq_grid, press, rho_w, temp)

Specific (one layer) atmospheric attenuation based on a simplified algorithm according to ITU-R P.676-10, Annex 2.1.

Parameters:

freq_gridQuantity

Frequencies at which to calculate line-width shapes [GHz]

pressQuantity

Total air pressure (dry + wet) [hPa]

rho_wQuantity

Water vapor density [g / m^3]

tempQuantity

Temperature [K]

Returns:

atten_dryQuantity

Dry-air specific attenuation [dB / km]

atten_wetQuantity

Wet-air specific attenuation [dB / km]

Notes

In contrast to Annex 1, the method in Annex 2 is only valid below 350 GHz.