../ dmsp_15_ephemeris_20190731.txt 22-Jun-2023 16:56 109610 dmsp_16_ephemeris_20190731.txt 22-Jun-2023 16:56 109594 dmsp_17_ephemeris_20190731.txt 22-Jun-2023 16:56 109748 dmsp_18_ephemeris_20190731.txt 22-Jun-2023 16:56 109567