../ dmsp_15_ephemeris_20171220.txt 22-Jun-2023 00:36 109449 dmsp_16_ephemeris_20171220.txt 22-Jun-2023 00:36 109353 dmsp_17_ephemeris_20171220.txt 22-Jun-2023 00:36 109285 dmsp_18_ephemeris_20171220.txt 22-Jun-2023 00:36 109192