../ dmsp_15_ephemeris_20210921.txt 22-Jun-2023 17:04 109548 dmsp_16_ephemeris_20210921.txt 22-Jun-2023 17:04 109677 dmsp_17_ephemeris_20210921.txt 22-Jun-2023 17:04 109618 dmsp_18_ephemeris_20210921.txt 22-Jun-2023 17:04 109446