The migrated and depth-converted stacks of the FIRE project are available as a set of SEG-Y files. The file sizes range from 45 MB (FIRE 2-3) to 655 MB (FIRE 4 & 4A). The number of CMPs varies from 1,537 to 22,699.
Typically, each stack represents a different subdivision of a line – FIRE 2-1 is separate from FIRE 2-2 and so on. The only exception is FIRE 4 & 4A. They form a continuous line but were surveyed in different directions, the former from south to north (Ranua to Sirkka) and the latter from north to south (Näätämö to Sirkka). In OpenFIRE, FIRE 4 and 4A have been joined to avoid possible confusion.
The pre-migration steps are described separately under NMO and DMO stacks. All stacks preserve their original sample rate at 2 milliseconds (15,000 or 8,001 samples per trace).