../ dmsp_15_ephemeris_20200912.txt 22-Jun-2023 00:45 109678 dmsp_16_ephemeris_20200912.txt 22-Jun-2023 00:45 109646 dmsp_17_ephemeris_20200912.txt 22-Jun-2023 00:45 109685 dmsp_18_ephemeris_20200912.txt 22-Jun-2023 00:45 109625