../ dmsp_15_ephemeris_20170401.txt 22-Jun-2023 00:33 108157 dmsp_16_ephemeris_20170401.txt 22-Jun-2023 00:33 108138 dmsp_17_ephemeris_20170401.txt 22-Jun-2023 00:33 108266 dmsp_18_ephemeris_20170401.txt 22-Jun-2023 00:33 108143