../ dmsp_15_ephemeris_20190317.txt 22-Jun-2023 00:40 108243 dmsp_16_ephemeris_20190317.txt 22-Jun-2023 00:40 108174 dmsp_17_ephemeris_20190317.txt 22-Jun-2023 00:40 108283 dmsp_18_ephemeris_20190317.txt 22-Jun-2023 00:40 108222