../ dmsp_15_ephemeris_20190911.txt 22-Jun-2023 16:31 109621 dmsp_16_ephemeris_20190911.txt 22-Jun-2023 16:31 109700 dmsp_17_ephemeris_20190911.txt 22-Jun-2023 16:31 109592 dmsp_18_ephemeris_20190911.txt 22-Jun-2023 16:31 109513