../ dmsp_15_ephemeris_20190503.txt 22-Jun-2023 16:30 109558 dmsp_16_ephemeris_20190503.txt 22-Jun-2023 16:30 109598 dmsp_17_ephemeris_20190503.txt 22-Jun-2023 16:30 109607 dmsp_18_ephemeris_20190503.txt 22-Jun-2023 16:30 109687