../ dmsp_15_ephemeris_20210526.txt 22-Jun-2023 16:35 109552 dmsp_16_ephemeris_20210526.txt 22-Jun-2023 16:35 109610 dmsp_17_ephemeris_20210526.txt 22-Jun-2023 16:35 109740 dmsp_18_ephemeris_20210526.txt 22-Jun-2023 16:35 109460