../ dmsp_15_ephemeris_20190519.txt 22-Jun-2023 00:40 109573 dmsp_16_ephemeris_20190519.txt 22-Jun-2023 00:40 109645 dmsp_17_ephemeris_20190519.txt 22-Jun-2023 00:40 109693 dmsp_18_ephemeris_20190519.txt 22-Jun-2023 00:40 109537