../ dmsp_15_ephemeris_20220913.txt 22-Jun-2023 00:53 109571 dmsp_16_ephemeris_20220913.txt 22-Jun-2023 00:53 109603 dmsp_17_ephemeris_20220913.txt 22-Jun-2023 00:53 109640 dmsp_18_ephemeris_20220913.txt 22-Jun-2023 00:53 109555