Column assignment is as follow:
* CALNEXceilo_30s_a.txt.
1 Year day
2 N, where N=number of cloud layers (0-3) or a code (4-5) for marginal clouds
(4 is full obscuration determined but no cloud base detected;
5 is some obscuration detected but determined to be transparent)
3 Height of the first layer in meters (NaN unless N>0)
4 Height of the second layer in meters (NaN unless N>1)
5 Height of the third layer in meters (NaN unless N>2)
* CALNEXceilo_10min_a.txt and CALNEXceilo_h_a.txt (1-hour)
1 Year day
2 number of data points in selected window section (10-min or hour)
3 number of clear samples
4 number of times at least one layer is present
5 number of times second or third layers are present
6 Obscuration cases (code 4 or 5)
7 number of partially obscured cases (code 5 only)
8 Clear fraction
9 cloud Fraction (cloud only)
10 cloud Fraction (cloud + oscure cases)
11 cloudbase heights (m)
12 + standard deviation of cloudbase height (16%)
13 - standard deviation of cloudbase height (84%)
* cloudbase_yyyy_mm_dd_doy.txt daily cloud base information
1 N, where N=number of cloud layers (0-3) or a code (4-5) for marginal clouds
2 Height of the first layer in meters (NaN unless N>0)
3 Height of the second layer in meters (NaN unless N>1)
4 Height of the third layer in meters (NaN unless N>2)
5 hour (utc)
6 min
7 sec
8 Year day
* backscatter_yyyy_mm_dd_doy.mat are raw variables saved into a binary MAT-file form.
To retrieve the data, use the load function of Matlab.
1 UTC time in decimal hours
2 Range of each gate in m
3 Sensitivity normalized backscatter coefficient in the unit srad-1.km-1