../ dmsp_15_ephemeris_20211215.txt 22-Jun-2023 00:49 109485 dmsp_16_ephemeris_20211215.txt 22-Jun-2023 00:49 109343 dmsp_17_ephemeris_20211215.txt 22-Jun-2023 00:49 109237 dmsp_18_ephemeris_20211215.txt 22-Jun-2023 00:49 109295