../ dmsp_15_ephemeris_20170506.txt 22-Jun-2023 00:34 109641 dmsp_16_ephemeris_20170506.txt 22-Jun-2023 00:34 109578 dmsp_17_ephemeris_20170506.txt 22-Jun-2023 00:34 109613 dmsp_18_ephemeris_20170506.txt 22-Jun-2023 00:34 109688