../ dmsp_15_ephemeris_20190301.txt 22-Jun-2023 16:55 108031 dmsp_16_ephemeris_20190301.txt 22-Jun-2023 16:55 108165 dmsp_17_ephemeris_20190301.txt 22-Jun-2023 16:55 108128 dmsp_18_ephemeris_20190301.txt 22-Jun-2023 16:55 108221