Hourly Epic_99 ceilometer statistics file
July 2, 2000


The 15-s ceilometer data were used to generate hourly cloud base and cloud fraction statistics. 
The data are contained in files sMMDDYY.dat in the stat_data.zip archive.  These daily files
were read in and combined into a single ascii txt file (epic99_cloudf_hr.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   20th percentile cloud base (m)
12   50th percentile (median) cloud base (m)
13   80th percentile cloud base (m)
 

Note, the raw 15-s data is also available from the ftp site.
rawbase_data.zip        15-s raw sky designation and cloud base data

ftp etl.noaa.gov 
username> anonymous
password> your email
cd /pub/et7/users/cwf/epic/epicmonitor/fall99/ceilometer