title: Measurement and simulation of the effect of snowfall on free-space optical propagation.
abstract: We measured the time variation of a received laser signal level during snowfall over a distance of 72 m. The signal level dropped sharply for up to 10 ms when a snowflake crossed the laser beam. The probability distribution of the variation due to snowfall was calculated by assuming it to be the linear superposition of the light diffracted by snowflakes. The measured distributions could be reproduced by assuming reasonable snowflake size distributions. Furthermore, the probability distributions due to snowfall over a 1 km distance were calculated, and the expected bit errors during snowfall and the transmitted beam sizes were evaluated.
authors.affiliation: National Institute of Information and Communications Technology, 4-2-1 Nukui-Kitamachi, Koganei, Tokyo 184-8795, Japan. akiba@nict.go.jp
authors.forename: Makoto
authors.initials: M
authors.lastname: Akiba
authors.forename: Kayo
authors.initials: K
authors.lastname: Ogawa
authors.forename: Kazuhiko
authors.initials: K
authors.lastname: Wakamori
authors.forename: Kashiko
authors.initials: K
authors.lastname: Kodate
authors.forename: Shigeo
authors.initials: S
authors.lastname: Ito