../ dmsp_15_ephemeris_20210524.txt 22-Jun-2023 00:47 109649 dmsp_16_ephemeris_20210524.txt 22-Jun-2023 00:47 109557 dmsp_17_ephemeris_20210524.txt 22-Jun-2023 00:47 109665 dmsp_18_ephemeris_20210524.txt 22-Jun-2023 00:47 109512