../ dmsp_15_ephemeris_20210804.txt 22-Jun-2023 16:36 109663 dmsp_16_ephemeris_20210804.txt 22-Jun-2023 16:36 109579 dmsp_17_ephemeris_20210804.txt 22-Jun-2023 16:36 109658 dmsp_18_ephemeris_20210804.txt 22-Jun-2023 16:36 109475