../ dmsp_15_ephemeris_20210131.txt 22-Jun-2023 16:35 108138 dmsp_16_ephemeris_20210131.txt 22-Jun-2023 16:35 107997 dmsp_17_ephemeris_20210131.txt 22-Jun-2023 16:35 107991 dmsp_18_ephemeris_20210131.txt 22-Jun-2023 16:35 108131