../ dmsp_15_ephemeris_20190422.txt 22-Jun-2023 00:40 109502 dmsp_16_ephemeris_20190422.txt 22-Jun-2023 00:40 109700 dmsp_17_ephemeris_20190422.txt 22-Jun-2023 00:40 109729 dmsp_18_ephemeris_20190422.txt 22-Jun-2023 00:40 109683