../ dmsp_15_ephemeris_20210619.txt 22-Jun-2023 00:47 109585 dmsp_16_ephemeris_20210619.txt 22-Jun-2023 00:47 109568 dmsp_17_ephemeris_20210619.txt 22-Jun-2023 00:47 109546 dmsp_18_ephemeris_20210619.txt 22-Jun-2023 00:47 109509