left"><tt>axis_centers&nbsp;&nbsp;&nbsp;</tt></td><td>   MPP_IO axistype array for grid centers ordered X-Y-Z-T (optional). <br>&nbsp;&nbsp;&nbsp;<span class="type">[axistype, dimension(4)]</span></td>
</tr>
<tr>
<td valign="top" align="left"><tt>axis_sizes&nbsp;&nbsp;&nbsp;</tt></td><td>   array of axis lengths ordered X-Y-Z-T (optional). <br>&nbsp;&nbsp;&nbsp;<span class="type">[integer, dimension(4)]</span></td>
</tr>
</table>
</dd>
<br>
</dl>
</li>
<li>
<a name="time_interp_external"></a>
<h4>time_inter