../ dmsp_15_ephemeris_20190913.txt 22-Jun-2023 16:57 109486 dmsp_16_ephemeris_20190913.txt 22-Jun-2023 16:57 109680 dmsp_17_ephemeris_20190913.txt 22-Jun-2023 16:57 109698 dmsp_18_ephemeris_20190913.txt 22-Jun-2023 16:57 109606