../ dmsp_15_ephemeris_20170818.txt 22-Jun-2023 00:35 109532 dmsp_16_ephemeris_20170818.txt 22-Jun-2023 00:35 109590 dmsp_17_ephemeris_20170818.txt 22-Jun-2023 00:35 109621 dmsp_18_ephemeris_20170818.txt 22-Jun-2023 00:35 109603