../ dmsp_15_ephemeris_20170721.txt 22-Jun-2023 00:34 109410 dmsp_16_ephemeris_20170721.txt 22-Jun-2023 00:34 109440 dmsp_17_ephemeris_20170721.txt 22-Jun-2023 00:34 109658 dmsp_18_ephemeris_20170721.txt 22-Jun-2023 00:34 109594