../ dmsp_15_ephemeris_20180524.txt 22-Jun-2023 00:37 109457 dmsp_16_ephemeris_20180524.txt 22-Jun-2023 00:37 109506 dmsp_17_ephemeris_20180524.txt 22-Jun-2023 00:37 109760 dmsp_18_ephemeris_20180524.txt 22-Jun-2023 00:37 109610