../ dmsp_15_ephemeris_20190404.txt 22-Jun-2023 16:30 108317 dmsp_16_ephemeris_20190404.txt 22-Jun-2023 16:30 108120 dmsp_17_ephemeris_20190404.txt 22-Jun-2023 16:30 108282 dmsp_18_ephemeris_20190404.txt 22-Jun-2023 16:30 108242