../ dmsp_15_ephemeris_20180811.txt 22-Jun-2023 00:38 109541 dmsp_16_ephemeris_20180811.txt 22-Jun-2023 00:38 109568 dmsp_17_ephemeris_20180811.txt 22-Jun-2023 00:38 109615 dmsp_18_ephemeris_20180811.txt 22-Jun-2023 00:38 109697