Vaisala Ceilometer CL31

PI Harry Kambezidis
Operator: Nikos Kappos
Participant National Observatory of Athens
Instrument picture

Vaisala Ceilometer CL31 measures cloud height and vertical visibility. Powerful laser pulses are sent out in a vertical direction. The reflection of light - backscatter -caused by haze, fog, mist, virga, precipitation and clouds is measured as the laser pulses traverse the sky.

Instrument activity

Recent measurements

No measurements found.


The campaign is organized and funded through the ACTRIS, the European Research Infrastructure for the observation of Aerosol, Clouds, and Trace gases.