../ dmsp_15_ephemeris_20190618.txt 22-Jun-2023 00:41 109513 dmsp_16_ephemeris_20190618.txt 22-Jun-2023 00:41 109645 dmsp_17_ephemeris_20190618.txt 22-Jun-2023 00:41 109627 dmsp_18_ephemeris_20190618.txt 22-Jun-2023 00:41 109662