TUBA input formats follow the rules laid down by the evaluation package TUBA (see 15.41 and Appendix C of the TUBA User Manual) where three separate formats are specified:
1) One record per origin, CSV;
2) One record per cell, CSV: Origin, Destination, Cell value;
3) One record per cell, fixed columns, user class plus multiple time periods.
Thus TUBA Format 1 is very similar to that of “CSV” described in Section 10.5.5 while 2 and 3 are similar to that in 10.5.4.
Further information on the three alternative formats may be found in Section 10.15.1.5.
Note that TUBA Format 3 is presumably intended to deal with multiple time periods whereas, as implemented in SATURN, only one cell value is generally output. It may, therefore, not be much use as of yet to “serious” TUBA users but it could be extended as and when required.