CONTENTS

RECOMMENDATION  ITU-R  P.1817     1
Propagation data required for the design of terrestrial free-space optical links     1
Scope     1
Annex 1     2
1 Atmospheric considerations  2
2 Molecular absorption  3
3 Molecular scattering  4
4 Aerosol absorption  5
5 Aerosol scattering  5
6 Scintillation  10
7 Rain attenuation  12
8 Snow attenuation  13
9 Ambient light effect 14
10  Cumulative distribution of attenuation  14
11 Hybrid/FSO systems  14
12     Visibility measurement 16
Appendix 1 to Annex 1  Computer modelling     18