../ dmsp_15_ephemeris_20240428.txt 03-Jun-2024 10:00 243 dmsp_16_ephemeris_20240428.txt 03-Jun-2024 10:00 243 dmsp_17_ephemeris_20240428.txt 03-Jun-2024 10:00 243 dmsp_18_ephemeris_20240428.txt 03-Jun-2024 10:00 243