../ dmsp_15_ephemeris_20250227.txt 05-Apr-2025 00:00 243 dmsp_16_ephemeris_20250227.txt 05-Apr-2025 00:00 243 dmsp_17_ephemeris_20250227.txt 05-Apr-2025 00:00 243 dmsp_18_ephemeris_20250227.txt 05-Apr-2025 00:00 243