../ dmsp_15_ephemeris_20210511.txt 22-Jun-2023 16:29 109486 dmsp_16_ephemeris_20210511.txt 22-Jun-2023 16:29 109525 dmsp_17_ephemeris_20210511.txt 22-Jun-2023 16:29 109629 dmsp_18_ephemeris_20210511.txt 22-Jun-2023 16:29 109622