../ dmsp_15_ephemeris_20220912.txt 22-Jun-2023 00:53 109580 dmsp_16_ephemeris_20220912.txt 22-Jun-2023 00:53 109601 dmsp_17_ephemeris_20220912.txt 22-Jun-2023 00:53 109618 dmsp_18_ephemeris_20220912.txt 22-Jun-2023 00:53 109644