../ dmsp_15_ephemeris_20210812.txt 22-Jun-2023 00:47 109656 dmsp_16_ephemeris_20210812.txt 22-Jun-2023 00:47 109615 dmsp_17_ephemeris_20210812.txt 22-Jun-2023 00:47 109689 dmsp_18_ephemeris_20210812.txt 22-Jun-2023 00:47 109490