../ dmsp_15_ephemeris_20210810.txt 22-Jun-2023 16:36 109579 dmsp_16_ephemeris_20210810.txt 22-Jun-2023 16:36 109585 dmsp_17_ephemeris_20210810.txt 22-Jun-2023 16:36 109577 dmsp_18_ephemeris_20210810.txt 22-Jun-2023 16:36 109634