../ dmsp_15_ephemeris_20201121.txt 22-Jun-2023 00:45 109468 dmsp_16_ephemeris_20201121.txt 22-Jun-2023 00:45 109488 dmsp_17_ephemeris_20201121.txt 22-Jun-2023 00:45 109402 dmsp_18_ephemeris_20201121.txt 22-Jun-2023 00:45 109413