../ dmsp_15_ephemeris_20210523.txt 22-Jun-2023 00:47 109502 dmsp_16_ephemeris_20210523.txt 22-Jun-2023 00:47 109602 dmsp_17_ephemeris_20210523.txt 22-Jun-2023 00:47 109526 dmsp_18_ephemeris_20210523.txt 22-Jun-2023 00:47 109537