Responsible: Georg Witt
Under the 6th Frame Programme of the European Union, the EU is promoting and financing the utilisation the ALOMAR Research Infrastructure (ARI) at Andřya, Norway. A co-operative project that currently enjoys EU's support is the experiment CABLE (Co-operative Alomar Bi-static Lidar Experiment). CABLE makes use of the laser beam emitted by one of the powerful ALOMAR lidars to study the scattering properties of tropospheric ice clouds and aerosol particles.
The main objective of the study is to assess the shape and possible orientation of the scattering particles, parameters not readily accessible by the common lidar backscatter observing mode. In contrast to the conventional lidar backscatter technique, the bi-static experiment records the scattered radiation of the vertically propagating laser beam from a remote site a few kilometres from the lidar transmitter. The rationale of this set-up is that the measurement can be extended to scattering angles of 130-170o where the polarisation parameters of the scattered light are sensitive indicators of the effect of non-sphericity of the scattering centres.
CABLE is a co-operation with the Hebrew University of Jerusalem and the Atmospheric Science Group at the Chemistry Department of Göteborg University. The instrumentation used for the study is a polarisation-sensitive lidar receiver, an updated version of the MISU lidar system used in the years 1965-71.
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Last updated: January 21, 2006
Jörg Gumbel (gumbel@misu.su.se)