../ dmsp_15_ephemeris_20210811.txt 22-Jun-2023 00:47 109564 dmsp_16_ephemeris_20210811.txt 22-Jun-2023 00:47 109600 dmsp_17_ephemeris_20210811.txt 22-Jun-2023 00:47 109522 dmsp_18_ephemeris_20210811.txt 22-Jun-2023 00:47 109513