../ dmsp_15_ephemeris_20180803.txt 22-Jun-2023 16:53 109484 dmsp_16_ephemeris_20180803.txt 22-Jun-2023 16:53 109440 dmsp_17_ephemeris_20180803.txt 22-Jun-2023 16:53 109655 dmsp_18_ephemeris_20180803.txt 22-Jun-2023 16:53 109640