../ dmsp_15_ephemeris_20211117.txt 22-Jun-2023 00:49 109367 dmsp_16_ephemeris_20211117.txt 22-Jun-2023 00:49 109384 dmsp_17_ephemeris_20211117.txt 22-Jun-2023 00:49 109307 dmsp_18_ephemeris_20211117.txt 22-Jun-2023 00:49 109343