../ dmsp_15_ephemeris_20190404.txt 22-Jun-2023 16:55 108317 dmsp_16_ephemeris_20190404.txt 22-Jun-2023 16:55 108120 dmsp_17_ephemeris_20190404.txt 22-Jun-2023 16:55 108282 dmsp_18_ephemeris_20190404.txt 22-Jun-2023 16:55 108242