I have noticed recently that the attitude and ephemeris files are not availble on a timely basis in the Aqua  subscription areas. Of course Terra is unaffected.
For a week or two I have been getting many failures in my logs which I see in the morning all look like the below snippet.

My script that picks up subcription data runs every 1/2 hour. It d/l's data only one regardless of the several subcriptions that may require the same granule.
It appears that granules are posted prior to the attitude and ephemeris files, since my script always d/l's the attitude and ephemeris files files prior to d/l'ing the L0 data.

Was there a change made recently? Perhaps the Aqua L0 should not be staged until the attitude and ephemeris files are availble as it cannot be processed without it.

LOG ERRORS:

Determining required predicted attitude and ephemeris files...
/optics1/software/seadas/seadas_6.2/run/scripts/modis_predicted_atteph.csh 2011062194000 2011062194949

Checking local hard disk for required real-time attitude and ephemeris files...
Present on hard disk: A20110621817112011062195238.att
Missing on hard disk: Predicted attitude file corresponding to pass stop time.
Present on hard disk: A20110621817112011062195238.eph
Missing on hard disk: Predicted ephemeris file corresponding to pass stop time.

Attempting to download missing files...

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TO CANCEL THESE TRANSFERS (AND ABORT GEOLOCATION PROCESSING) PRESS CTRL-\
WARNING: IF YOU ABORT, MAKE SURE TO REMOVE THE PARTIALLY DOWNLOADED FILES
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*** No real-time attitude file corresponding to pass stop time exists on http site. Exiting.

*Failed to determine/retrieve required predicted attitude and ephemeris files*

The required attitude and ephemeris files are not available!
Processing cannot proceed.