../ dmsp_15_ephemeris_20210613.txt 22-Jun-2023 16:29 109520 dmsp_16_ephemeris_20210613.txt 22-Jun-2023 16:29 109527 dmsp_17_ephemeris_20210613.txt 22-Jun-2023 16:29 109640 dmsp_18_ephemeris_20210613.txt 22-Jun-2023 16:29 109502