Path loss due to wet snow
Calculate the one-way path loss due to snow for an RF transmission of
77 GHz at a range of
10 km. The snow equivalent precipitation rate is
r = 10e3; f = 77e9; rs = 0.75; l = snowpl(r,f,rs)
l = 1.0017
r— Propagation distances
Propagation distances in meters, specified as an M-length vector.
f— Signal carrier frequency
Signal carrier frequency in hertz, specified as an N-length vector.
rs— Equivalent liquid water content
Equivalent liquid water content, specified as a scalar expressed in mm/h.
comma-separated pairs of
the argument name and
Value is the corresponding value.
Name must appear inside quotes. You can specify several name and value
pair arguments in any order as
snowpl(r,f,rs,'SnowModel','ITU','Type','Dry')specifies the ITU snow model with dry snow.
'SnowModel'— Snow model
Snow model, specified as
'ITU'. Use the
'GunnEast' model for RF
frequencies and the
'ITU' model for optical frequencies.
'Type'— Type of snow
Type of snow, specified as
'Type' applies only when
SnowModel is set
'ITU'. The function ignores this input when
SnowModel is set to
l— Path loss
Path loss of each propagation path under the corresponding frequency, returned as an M-by-N matrix.
 Gunn, K. L. S., and T. W. R. East. “The Microwave Properties of Precipitation Particles.” Quarterly Journal of the Royal Meteorological Society 80, no. 346 (October 1954): 522–45. https://doi.org/10.1002/qj.49708034603.
 International Telecommunication Union (ITU). "Propagation Data Required for the Design of Terrestrial Free-Space Optical Links". Recommendation ITU-R P.1817-1, P Series, Radiowave Propagation, February 2012.
 Nakaya, Ukitiro, and Tôiti Jr Terada. “Simultaneous Observations of the Mass, Falling Velocity and Form of Individual Snow Crystals.” Journal of the Faculty of Science, vol.1, no. 7 (January 30, 1935): 191–200.
 Richards, M. A., Jim Scheer, William A. Holm, and William L. Melvin, eds. Principles of Modern Radar. Raleigh, NC: SciTech Pub, 2010.