../ dmsp_15_ephemeris_20171231.txt 22-Jun-2023 16:27 109377 dmsp_16_ephemeris_20171231.txt 22-Jun-2023 16:27 109401 dmsp_17_ephemeris_20171231.txt 22-Jun-2023 16:27 109336 dmsp_18_ephemeris_20171231.txt 22-Jun-2023 16:27 109289