../ dmsp_15_ephemeris_20170521.txt 22-Jun-2023 00:34 109496 dmsp_16_ephemeris_20170521.txt 22-Jun-2023 00:34 109587 dmsp_17_ephemeris_20170521.txt 22-Jun-2023 00:34 109674 dmsp_18_ephemeris_20170521.txt 22-Jun-2023 00:34 109683