- U0 corresponds to results that are specific to the first available stage in a dataset, U1 corresponds to results that are specific to the second available stage in a dataset etc...  For example, in chitaleMA1, U0 would correspond to results specific to stage 1A and U1 would correspond to results specific to stage 1B in chitaleMA1.
- The first column, usnapNo. is not in sorted order.  Usnap x is not usnap dx in general as the first columns in this directory is not sorted, e.g., usnap 0 may not be usnap d0.
