../ dmsp_15_ephemeris_20180412.txt 22-Jun-2023 00:37 109653 dmsp_16_ephemeris_20180412.txt 22-Jun-2023 00:37 109686 dmsp_17_ephemeris_20180412.txt 22-Jun-2023 00:37 109704 dmsp_18_ephemeris_20180412.txt 22-Jun-2023 00:37 109590