Hourly Epic2001 legII ceilometer statistics file
Feb 20, 2002


The 15-s ceilometer data were used to generate hourly cloud base and cloud 
fraction statistics. 
The data are computed from the logged files MM_DD_YY.cxx contained in files 
MM_DD_YY.zip in the archive.  These daily files
were read in and combined into a single hourly ascii txt file 
(epic2_ceilo_h.txt) which contain 13
columns:

1    Julian day GMT (middle of hour)
2    # of "total" 15-s data points
3    # of "clear" data points
4    # of "single cloud base" data points
5    # of "multiple cloud base" data points
6    # of "totally obscured" data points
7    # of "partially obscured" data points
8    clear fraction
9    cloud fraction without including totally obscured points
10   cloud fraction including totally obscured points
11   16th percentile cloud base (m)
12   50th percentile (median) cloud base (m)
13   84th percentile cloud base (m)
 


There is also a similar file that has been averaged at 10-min time resolution: 
epic2_ceilo_10min.txt.

Note, the raw 15-s data is also available from the ftp site in the form of 
daily zip files mentioned above.
        There is also a single ascii file with the 15-s raw sky designation and 
cloud base data
	which is called epic2_ceilo_15s.txt.

Access the data at
ftp://ftp.etl.noaa.gov/et7/anonymous/cfairall/EPIC/epic2001/ceilo/