../ dmsp_15_ephemeris_20180519.txt 22-Jun-2023 00:37 109463 dmsp_16_ephemeris_20180519.txt 22-Jun-2023 00:37 109558 dmsp_17_ephemeris_20180519.txt 22-Jun-2023 00:37 109650 dmsp_18_ephemeris_20180519.txt 22-Jun-2023 00:37 109541