../ dmsp_15_ephemeris_20180921.txt 22-Jun-2023 00:38 109693 dmsp_16_ephemeris_20180921.txt 22-Jun-2023 00:38 109660 dmsp_17_ephemeris_20180921.txt 22-Jun-2023 00:38 109647 dmsp_18_ephemeris_20180921.txt 22-Jun-2023 00:38 109625