../ dmsp_15_ephemeris_20170723.txt 22-Jun-2023 00:34 109576 dmsp_16_ephemeris_20170723.txt 22-Jun-2023 00:34 109568 dmsp_17_ephemeris_20170723.txt 22-Jun-2023 00:34 109555 dmsp_18_ephemeris_20170723.txt 22-Jun-2023 00:34 109497