../ dmsp_15_ephemeris_20230913.txt 13-Nov-2023 22:00 243 dmsp_16_ephemeris_20230913.txt 13-Nov-2023 22:00 243 dmsp_17_ephemeris_20230913.txt 13-Nov-2023 22:00 243 dmsp_18_ephemeris_20230913.txt 13-Nov-2023 22:00 243