taset and the computed
maximum divided by minimum delta time should always be 1.0.  for
monthly data, the delta time should be between 28 and 31 days and the
maximum ratio should be about 1.1.  the running value of the delta
time is computed as data is read and any wraparound or cycling is also
included.  this input helps trap missing data or errors in cycling.
to turn off trapping, set the value to 1.0e30 or something similar.
default=1.5. 
</pre>
        </div>
    </td>
    <td>real(30)</td>
    <td>shr_