../ dmsp_15_ephemeris_20180902.txt 22-Jun-2023 00:38 109669 dmsp_16_ephemeris_20180902.txt 22-Jun-2023 00:38 109609 dmsp_17_ephemeris_20180902.txt 22-Jun-2023 00:38 109660 dmsp_18_ephemeris_20180902.txt 22-Jun-2023 00:38 109628