../ dmsp_15_ephemeris_20211216.txt 22-Jun-2023 00:49 109328 dmsp_16_ephemeris_20211216.txt 22-Jun-2023 00:49 109337 dmsp_17_ephemeris_20211216.txt 22-Jun-2023 00:49 109305 dmsp_18_ephemeris_20211216.txt 22-Jun-2023 00:49 109316