../ dmsp_15_ephemeris_20190404.txt 22-Jun-2023 00:40 108317 dmsp_16_ephemeris_20190404.txt 22-Jun-2023 00:40 108120 dmsp_17_ephemeris_20190404.txt 22-Jun-2023 00:40 108282 dmsp_18_ephemeris_20190404.txt 22-Jun-2023 00:40 108242