../ dmsp_15_ephemeris_20181215.txt 22-Jun-2023 00:39 109352 dmsp_16_ephemeris_20181215.txt 22-Jun-2023 00:39 109381 dmsp_17_ephemeris_20181215.txt 22-Jun-2023 00:39 109414 dmsp_18_ephemeris_20181215.txt 22-Jun-2023 00:39 109305