../ dmsp_15_ephemeris_20240420.txt 01-Jun-2024 18:00 243 dmsp_16_ephemeris_20240420.txt 01-Jun-2024 18:00 243 dmsp_17_ephemeris_20240420.txt 01-Jun-2024 18:00 243 dmsp_18_ephemeris_20240420.txt 01-Jun-2024 18:00 243