../ dmsp_15_ephemeris_20170613.txt 22-Jun-2023 00:34 109530 dmsp_16_ephemeris_20170613.txt 22-Jun-2023 00:34 109609 dmsp_17_ephemeris_20170613.txt 22-Jun-2023 00:34 109589 dmsp_18_ephemeris_20170613.txt 22-Jun-2023 00:34 109499