What do the time values in AIRS L1 and L2 data products represent?
The time values (TAI93: International Atomic Time 1993) are elapsed time in seconds since Jan 1, 1993, Coordinated Universal Time (UTC). For example, a time value of 410227204.00 corresponds to 12/31/2005 23:59:59.00 UTC. Note that a leap second was added at the end of 2005 (i.e. December 31, 2005). Therefore, TAI93 value of 410227206.00 (2 seconds after the above example) is 01/01/2006 00:00:00.00 UTC (not 01/01/2006 00:00:01.00 UTC) due to the leap second. Leap seconds are introduced on an irregular basis (see http://maia.usno.navy.mil/eo/leapsec.html for additional information on leap seconds and ftp://hpiers.obspm.fr/iers/bul/bulc/bulletinc.dat for announcements on the introduction of new leap seconds).
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- What do the time values in AIRS L1 and L2 data products represent?
