../ dmsp_15_ephemeris_20190904.txt 22-Jun-2023 16:31 109674 dmsp_16_ephemeris_20190904.txt 22-Jun-2023 16:31 109600 dmsp_17_ephemeris_20190904.txt 22-Jun-2023 16:31 109570 dmsp_18_ephemeris_20190904.txt 22-Jun-2023 16:31 109558