PROCEDURE: cdf_leap_second_init PURPOSE: CDF library 3.4.0 and later supports time formats the include leap seconds. Specifically tt2000. This routine maintains the calibration file that is required by the CDF library and TDAS to perform the conversions. NOTES: #1 Missions that use tt2000 times in their CDFs should call this routine inside their mission init/ config routines. (e.g. thm_init/thm_config) #2 Set !CDF_LEAP_SECOND.preserve_leap_seconds=1 if you want to keep leap seconds included in unix times after they're imported. This may mean that the data set will have a time dependent time skew with other data sets by ~35 seconds.(or more as additional leap seconds are added.) #3 This routine may modify the environment variable CDF_LEAPSECONDTABLE and update the CDF leap second table if a new version is found. $LastChangedBy: kersten $ $LastChangedDate: 2013-07-16 10:55:55 -0700 (Tue, 16 Jul 2013) $ $LastChangedRevision: 12683 $ $URL: svn+ssh://thmsvn@ambrosia.ssl.berkeley.edu/repos/spdsoft/trunk/general/misc/time/TT2000/cdf_leap_second_init.pro $