../ dmsp_15_ephemeris_20211001.txt 22-Jun-2023 00:48 109648 dmsp_16_ephemeris_20211001.txt 22-Jun-2023 00:48 109617 dmsp_17_ephemeris_20211001.txt 22-Jun-2023 00:48 109716 dmsp_18_ephemeris_20211001.txt 22-Jun-2023 00:48 109584