../ dmsp_15_ephemeris_20210523.txt 22-Jun-2023 17:02 109502 dmsp_16_ephemeris_20210523.txt 22-Jun-2023 17:02 109602 dmsp_17_ephemeris_20210523.txt 22-Jun-2023 17:02 109526 dmsp_18_ephemeris_20210523.txt 22-Jun-2023 17:02 109537