Calipso satellite time conversion to matlab time

The function converts time of data stored in the Caliop Instrument hdf file.

[YEAR, MONTH, DAY, HOUR, MINUTE, SECOND] = UNIXSECS2DATE(SECS) returns
% the calendar date (year, month, day, hour, minute, and second)
% corresponding to given number of seconds since 00:00:00 1 January 1993
% thus in calipso time taken from Profile_Time Variable

Use of HDFREAD function required to extract Profile_Time variable from the Calipso dataset.