../ dmsp_15_ephemeris_20210406.txt 22-Jun-2023 00:46 108257 dmsp_16_ephemeris_20210406.txt 22-Jun-2023 00:46 108247 dmsp_17_ephemeris_20210406.txt 22-Jun-2023 00:46 108297 dmsp_18_ephemeris_20210406.txt 22-Jun-2023 00:46 108204