../ dmsp_15_ephemeris_20210820.txt 22-Jun-2023 17:03 109505 dmsp_16_ephemeris_20210820.txt 22-Jun-2023 17:03 109476 dmsp_17_ephemeris_20210820.txt 22-Jun-2023 17:03 109713 dmsp_18_ephemeris_20210820.txt 22-Jun-2023 17:03 109456