../ dmsp_15_ephemeris_20210525.txt 22-Jun-2023 00:47 109598 dmsp_16_ephemeris_20210525.txt 22-Jun-2023 00:47 109589 dmsp_17_ephemeris_20210525.txt 22-Jun-2023 00:47 109647 dmsp_18_ephemeris_20210525.txt 22-Jun-2023 00:47 109505