../ dmsp_15_ephemeris_20210924.txt 22-Jun-2023 16:36 109687 dmsp_16_ephemeris_20210924.txt 22-Jun-2023 16:36 109656 dmsp_17_ephemeris_20210924.txt 22-Jun-2023 16:36 109559 dmsp_18_ephemeris_20210924.txt 22-Jun-2023 16:36 109686