../ dmsp_15_ephemeris_20230708.txt 08-Sep-2023 22:00 109634 dmsp_16_ephemeris_20230708.txt 08-Sep-2023 22:00 109588 dmsp_17_ephemeris_20230708.txt 08-Sep-2023 22:00 109637 dmsp_18_ephemeris_20230708.txt 08-Sep-2023 22:00 109515