../ dmsp_15_ephemeris_20210924.txt 22-Jun-2023 00:48 109687 dmsp_16_ephemeris_20210924.txt 22-Jun-2023 00:48 109656 dmsp_17_ephemeris_20210924.txt 22-Jun-2023 00:48 109559 dmsp_18_ephemeris_20210924.txt 22-Jun-2023 00:48 109686