../ dmsp_15_ephemeris_20181207.txt 22-Jun-2023 00:39 109331 dmsp_16_ephemeris_20181207.txt 22-Jun-2023 00:39 109390 dmsp_17_ephemeris_20181207.txt 22-Jun-2023 00:39 109285 dmsp_18_ephemeris_20181207.txt 22-Jun-2023 00:39 109231