../ dmsp_15_ephemeris_20201218.txt 22-Jun-2023 00:45 109358 dmsp_16_ephemeris_20201218.txt 22-Jun-2023 00:45 109334 dmsp_17_ephemeris_20201218.txt 22-Jun-2023 00:45 109271 dmsp_18_ephemeris_20201218.txt 22-Jun-2023 00:45 109389