../ dmsp_15_ephemeris_20181120.txt 22-Jun-2023 00:39 109460 dmsp_16_ephemeris_20181120.txt 22-Jun-2023 00:39 109453 dmsp_17_ephemeris_20181120.txt 22-Jun-2023 00:39 109364 dmsp_18_ephemeris_20181120.txt 22-Jun-2023 00:39 109397