../ dmsp_15_ephemeris_20210914.txt 22-Jun-2023 16:36 109562 dmsp_16_ephemeris_20210914.txt 22-Jun-2023 16:36 109567 dmsp_17_ephemeris_20210914.txt 22-Jun-2023 16:36 109659 dmsp_18_ephemeris_20210914.txt 22-Jun-2023 16:36 109615