../ dmsp_15_ephemeris_20170531.txt 22-Jun-2023 16:49 109569 dmsp_16_ephemeris_20170531.txt 22-Jun-2023 16:49 109566 dmsp_17_ephemeris_20170531.txt 22-Jun-2023 16:49 109571 dmsp_18_ephemeris_20170531.txt 22-Jun-2023 16:49 109567