../ dmsp_15_ephemeris_20170909.txt 22-Jun-2023 16:50 109664 dmsp_16_ephemeris_20170909.txt 22-Jun-2023 16:50 109499 dmsp_17_ephemeris_20170909.txt 22-Jun-2023 16:50 109754 dmsp_18_ephemeris_20170909.txt 22-Jun-2023 16:50 109565