with the following equation,
h = c
t
2
where c is the speed of light (c = 2.99 x 108 m/s). In principle, CL51 is able to detect three cloud
layers simultaneously, but if the cloud base is obscured due to precipitation or ground-based
fog, vertical visibility is reported. Information about fog and precipitation can also be derived
from the return signal as they attenuate the return signal from a cloud. In its
/media/vedurstofan-utgafa-2019/VI_2019_009.pdf
scale, used to identify weather analogues. These fields are
extracted twice daily (00UTC and 12UTC) on a 1 x 1 latitude-longitude grid from the
ECMWF operational analysis and forecasts available for the period 2001–2006. The ana-
logue meteorological situations are extracted from the ERA-40 reanalysis archive (Uppala
et al., 2005) for the period 1958–2001.
14
Predictants:
Gridded series of daily
/media/vedurstofan/utgafa/skyrslur/2014/VI_2014_006.pdf