../ dmsp_15_ephemeris_20171207.txt 22-Jun-2023 00:35 109448 dmsp_16_ephemeris_20171207.txt 22-Jun-2023 00:35 109402 dmsp_17_ephemeris_20171207.txt 22-Jun-2023 00:35 109224 dmsp_18_ephemeris_20171207.txt 22-Jun-2023 00:35 109252