../ dmsp_15_ephemeris_20190422.txt 22-Jun-2023 16:30 109502 dmsp_16_ephemeris_20190422.txt 22-Jun-2023 16:30 109700 dmsp_17_ephemeris_20190422.txt 22-Jun-2023 16:30 109729 dmsp_18_ephemeris_20190422.txt 22-Jun-2023 16:30 109683