../ dmsp_15_ephemeris_20210809.txt 22-Jun-2023 00:47 109595 dmsp_16_ephemeris_20210809.txt 22-Jun-2023 00:47 109573 dmsp_17_ephemeris_20210809.txt 22-Jun-2023 00:47 109730 dmsp_18_ephemeris_20210809.txt 22-Jun-2023 00:47 109603