../ dmsp_15_ephemeris_20210820.txt 22-Jun-2023 00:48 109505 dmsp_16_ephemeris_20210820.txt 22-Jun-2023 00:48 109476 dmsp_17_ephemeris_20210820.txt 22-Jun-2023 00:48 109713 dmsp_18_ephemeris_20210820.txt 22-Jun-2023 00:48 109456