../ dmsp_15_ephemeris_20190421.txt 22-Jun-2023 00:40 109650 dmsp_16_ephemeris_20190421.txt 22-Jun-2023 00:40 109516 dmsp_17_ephemeris_20190421.txt 22-Jun-2023 00:40 109549 dmsp_18_ephemeris_20190421.txt 22-Jun-2023 00:40 109641