14.2.7 Time level indices

As explained in Section 21.4, indices are used to point to various time levels on disk and in the memory window. Note that all of these indices are integers.

The indices which point to time levels within the memory window are:

•  taum1 which points to data at time level $\tau-1$.
•  tau which points to data at time level $\tau$.
•  taup1 which points to data at time level $\tau+1$.

The indices which point to time levels on disk are:

•  taum1disk which points to data at time level $\tau-1$.
•  taudisk which points to data at time level $\tau$.
•  taup1disk which points to data at time level $\tau+1$.

Note that typically there are only two disks needed (unless multi-tasking with the coarse grained parallel approach). In this typical case, the ``taup1disk'' takes on the value of ``taum1disk''.