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Why would there be missing data for certain days?

There are several possible reasons for missing data:

• The launch of the Aqua satellite that carries the AIRS instrument occurred on May 4, 2002. Processing on AIRS data to be distributed to the public began on data date March 12, 2003.
• If you are seeking most recent data, it is possible the data is still in the processing pipeline and will soon be available. There is typically a lag from the time instrument observations are made on the satellite until the data is processed and made available to the public.
• Sometimes satellite maneuvers, other necessary onboard procedures or technical problems will cause gaps in the data collection. Those instances will be documented and found at the NASA JPL AIRS website when appropriate.

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