../ dmsp_15_ephemeris_20210804.txt 22-Jun-2023 00:47 109663 dmsp_16_ephemeris_20210804.txt 22-Jun-2023 00:47 109579 dmsp_17_ephemeris_20210804.txt 22-Jun-2023 00:47 109658 dmsp_18_ephemeris_20210804.txt 22-Jun-2023 00:47 109475