../ dmsp_15_ephemeris_20130518.txt 22-Jun-2023 00:22 109488 dmsp_16_ephemeris_20130518.txt 22-Jun-2023 00:22 109608 dmsp_17_ephemeris_20130518.txt 22-Jun-2023 00:22 109579 dmsp_18_ephemeris_20130518.txt 22-Jun-2023 00:22 109575