../ dmsp_15_ephemeris_20171227.txt 22-Jun-2023 00:36 109455 dmsp_16_ephemeris_20171227.txt 22-Jun-2023 00:36 109458 dmsp_17_ephemeris_20171227.txt 22-Jun-2023 00:36 109373 dmsp_18_ephemeris_20171227.txt 22-Jun-2023 00:36 109247