../ dmsp_15_ephemeris_20190615.txt 22-Jun-2023 00:41 109482 dmsp_16_ephemeris_20190615.txt 22-Jun-2023 00:41 109519 dmsp_17_ephemeris_20190615.txt 22-Jun-2023 00:41 109560 dmsp_18_ephemeris_20190615.txt 22-Jun-2023 00:41 109513