../ dmsp_15_ephemeris_20180922.txt 22-Jun-2023 00:38 109527 dmsp_16_ephemeris_20180922.txt 22-Jun-2023 00:38 109597 dmsp_17_ephemeris_20180922.txt 22-Jun-2023 00:38 109687 dmsp_18_ephemeris_20180922.txt 22-Jun-2023 00:38 109494