../ dmsp_15_ephemeris_20170714.txt 22-Jun-2023 16:49 109502 dmsp_16_ephemeris_20170714.txt 22-Jun-2023 16:49 109579 dmsp_17_ephemeris_20170714.txt 22-Jun-2023 16:49 109577 dmsp_18_ephemeris_20170714.txt 22-Jun-2023 16:49 109663