 class="m-help">Description of TimeSeries&nbsp;</td>
         </tr>
         <tr class="summary-item">
            <td class="name">dimension</td>
            <td class="m-help">Number of pixels on x, y, (and z) axes.&nbsp;</td>
         </tr>
         <tr class="summary-item">
            <td class="name">external_file</td>
            <td class="m-help">Path or URL to one or more external file(s). Field only present if format=external. NOTE: this is only relevant if the image
               is stored in t