../ dmsp_15_ephemeris_20210801.txt 22-Jun-2023 00:47 109519 dmsp_16_ephemeris_20210801.txt 22-Jun-2023 00:47 109548 dmsp_17_ephemeris_20210801.txt 22-Jun-2023 00:47 109639 dmsp_18_ephemeris_20210801.txt 22-Jun-2023 00:47 109546