TECH NOTE 1: Local midnight and noontime roll-overs occur several hours into Universal Time (UTC, aka GMT, aka Z, aka Greenwich time, aka London time):
midnight EST = 1 am EDT = 0500 UTC; noon EST = 1 pm EDT = 1700 UTC
midnight CST = 1 am CDT = 0600 UTC; noon CST = 1 pm CDT = 1800 UTC
midnight MST = 1 am MDT = 0700 UTC; noon MST = 1 pm MDT = 1900 UTC
midnight PST = 1 am PDT = 0800 UTC; noon PST = 1 pm PDT = 2000 UTC
TECH NOTE 2: Most of our files have time-stamp names in odometer-style Universal Time, "YYMMDDhhmmSatChan.TYPE".
For example, "0312311745G08I01.TIFF" is decoded as:
- year = 03 (2003)
- month = 12 (December)
- day = 31 (the 31st of the month)
- hour = 17 (12 noon + 5 pm Universal Time in London, England)
- minutes = 45 (:45 minutes after the hour)
- Satellite = G12 (GOES-12, aka GOES-EAST)
- Channel = I01 (Imager channel 1, aka visible)
- Type = TIFF (Tagged Image File Format)