../ dmsp_15_ephemeris_20181222.txt 22-Jun-2023 00:39 109456 dmsp_16_ephemeris_20181222.txt 22-Jun-2023 00:39 109444 dmsp_17_ephemeris_20181222.txt 22-Jun-2023 00:39 109237 dmsp_18_ephemeris_20181222.txt 22-Jun-2023 00:39 109316