CONTENTS

RECOMMENDATION  ITU-R  P.1814
Prediction methods required for the design of terrestrial free-space optical links
Scope
Annex 1
1 Introduction
2 Initial considerations in designing an FSO link
        2.1 Weather
        2.2 Path characteristics
        2.3 Transceiver mounting
3 Geometrical attenuation
4 Specific atmospheric attenuation due to absorption and scattering γ_atmo
        4.1 Specific clear-air attenuation γ_{clear_air}
        4.2 Specific excess attenuation
                  4.2.1 Estimation of specific attenuation due to fog γ_fog (Mie scattering)
                  4.2.2 Specific attenuation due to rain γ_rain
                  4.2.3 Specific attenuation due to snowγ_snow
5 Scintillation effects
6 Ambient light effect
7 Link margin calculation
8 Other issues