Here is the File format of 

(from http://licel.com/manuals/programmingManual.pdf)

Sample file header
a9981017.204567
Berlin 10/08/1999 17:20:36 10/08/1999 17:20:41 0015 0015.0 0053.0 00
0000000 0010 0002000 0005 02
1 0 2 08000 1 1600 07.5 286.o 0 0 00 000 12 002000 0.100 BT1
1 1 2 08000 1 1600 07.5 286.o 0 0 00 000 00 002000 0.793 BC1
Line 1
Filename string a.
Format: ?yyMddhh.mmssmsms
? - The first letter can be choose freely.
yy - Two numbers showing the years in the century.
M - One number containing the month as a hexadecimal number
(December  C).
dd - Two numbers containing the day of month.
hh - Two numbers containing the hours since midnight.
mm - Two numbers containing the minutes.
s - Two number containing the seconds.
ms - Two number containing the milliseconds divided by ten.
Line 2
Location String with 8 Letters.
Start Time dd/mm/yyyy hh:mm:ss..
Stop Time dd/mm/yyyy hh:mm:ss.
Hight asl. Four digits (meter).
Longitude Four digits (including - sign). one digit for decimal grades.
Lattitude Four digits (including - sign). one digit for decimal grades.
zenith angle Two digits in degrees.
37
C - Example Programs
Line 3
Laser 1 Number of shots Integer 7 digits
Pulse repetition frequency for Laser 1 Integer 5 digits
Laser 2 Number of shots Integer 7 digits
Pulse repetition frequency for Laser 2 Integer 5 digits
number of datasets in the file Integer 2 digits
Dataset Description
Active 1 if dataset is present, 0 otherwise
Analog/Photoncounting Analog  0, Photoncounting  1
Laser source One digit Laser 1  1, Laser 2  2.
Number of bins 5 digits
1
PMT highvoltage Four digits in Volt
binwidth In meter two digits before . and 2 digits after the dot
Laser wavelength In nm, three digits dot
Polarisation One letter, o  no polarisation, s  perpendikular, l  parallel
0 0 00 000 Backward compatibility
number of ADC bits In case of an analog dataset, otherwise 0
number of shots 6 digits
analog input range/discriminator level Analog input range in Volt in case of analog dataset , discriminator
level in case of photon counting, one digit dot 3 digits.
Dataset descriptor BT  analog dataset, BC  photon counting, the number is the transient
recorder number as a hexadecimal.
The data set description is followed by an extra CRLF. The datasets are 32bit integer values and are
separated by CRLF. The last dataset is followed by a CRLF. These CRLF are used as markers and can be
used as check points for file integrity.