../ dmsp_15_ephemeris_20210318.txt 22-Jun-2023 16:35 108306 dmsp_16_ephemeris_20210318.txt 22-Jun-2023 16:35 108180 dmsp_17_ephemeris_20210318.txt 22-Jun-2023 16:35 108236 dmsp_18_ephemeris_20210318.txt 22-Jun-2023 16:35 108267