../ dmsp_15_ephemeris_20170428.txt 22-Jun-2023 00:34 109580 dmsp_16_ephemeris_20170428.txt 22-Jun-2023 00:34 109611 dmsp_17_ephemeris_20170428.txt 22-Jun-2023 00:34 109604 dmsp_18_ephemeris_20170428.txt 22-Jun-2023 00:34 109678