../ dmsp_15_ephemeris_20190316.txt 22-Jun-2023 00:40 108315 dmsp_16_ephemeris_20190316.txt 22-Jun-2023 00:40 108305 dmsp_17_ephemeris_20190316.txt 22-Jun-2023 00:40 108230 dmsp_18_ephemeris_20190316.txt 22-Jun-2023 00:40 108143