../ dmsp_15_ephemeris_20180615.txt 22-Jun-2023 00:37 109472 dmsp_16_ephemeris_20180615.txt 22-Jun-2023 00:37 109487 dmsp_17_ephemeris_20180615.txt 22-Jun-2023 00:37 109582 dmsp_18_ephemeris_20180615.txt 22-Jun-2023 00:37 109549