t valid value of the time array.
valid values: cycle,extend,limit
    extend = extrapolate before and after the period by using the first or last value.
    cycle  = cycle between the range of data
    limit  = restrict to the period for which the data is valid
default="cycle".
</pre>
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    <td>char*256(30)</td>
    <td>shr_strdata_nml</td>
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        <code cla