Comparison of exact and approximate FSO rain attenuation formulas based on actual DSD

Author

Brazda, Vladimir ; Fiser, Ondrej

Author_Institution

Inst. of Atmos. Phys. Prague, Prague, Czech Republic

fYear

2015

fDate

13-17 April 2015

Firstpage

1

Lastpage

5

Abstract

This contribution deals with estimation of rain attenuation on free space optical (FSO) links. The approximative model recommended by ITU-R is compared with the exact solution using actual rain drop size distribution (DSD) measured in Prague by 2D video-distrometer. Results show that the error is non-negligible especially at rain rates higher than 15 mm/h due to rain spectrum variability. We produced the new power law model. However, we concluded, that another parameter representing DSD must be added when estimating the rain attenuation on FSO links.

Keywords

drops; optical links; rain; size measurement; 2D video distrometer; ITU-R model; Prague; actual DSD measurement; actual rain drop size distribution measurement; approximate FSO rain attenuation formula; exact FSO rain attenuation formula; free space optical link; power law model; rain spectrum variability; Approximation methods; Atmospheric measurements; Atmospheric modeling; Attenuation; Optical attenuators; Rain; Scattering; drop size distribution; free space optics; rain attenuation; video-distrometer;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation (EuCAP), 2015 9th European Conference on

Conference_Location

Lisbon

Type

conf

Filename

7228735