../ dmsp_15_ephemeris_20180929.txt 22-Jun-2023 00:38 109610 dmsp_16_ephemeris_20180929.txt 22-Jun-2023 00:38 109655 dmsp_17_ephemeris_20180929.txt 22-Jun-2023 00:38 109683 dmsp_18_ephemeris_20180929.txt 22-Jun-2023 00:38 109501