Our data are not available via FTP, except for data orders (we will eventually eliminate FTP distribution for these as well).
To identify retrospective files for a given region, use the
L1/L2 browser - MODIS L0 are included, however unless you intend
to stitch adjacent granules together, you can use the L1A data.
You can also create a
data subscription to have forward stream data for your region of interest staged for you.
Sean