19 October 2017
The Collection 6.1 (C6.1) reprocessing of MODIS Atmospheres data products, including Deep Blue, has begun! At the time of writing, MODIS Terra data from 2000 to mid-2008 are available; additional data are added to the archive as they are processed.
Terra and Aqua C6.1 data are both available in forward processing from 15 October 2017 onwards. The reprocessing of the historical missions (launch up to present) with C6.1 algorithms and inputs has begun for Terra and will follow early next year for Aqua. The release schedule is shown in more detail at the above link. Data products are freely available from the same locations, e.g. NASA LAADS, as previous Collections.
In C6.1, various improvements have been made to the MODIS Deep Blue data. You can read more about C6.1 in general here, and download a document detailing changes in the Deep Blue data product here. If you have any questions, please feel free to get in touch.