../ dmsp_15_ephemeris_20230417.txt 22-Jun-2023 17:11 109752 dmsp_16_ephemeris_20230417.txt 22-Jun-2023 17:11 109639 dmsp_17_ephemeris_20230417.txt 22-Jun-2023 17:11 109709 dmsp_18_ephemeris_20230417.txt 22-Jun-2023 17:11 109519