../ dmsp_15_ephemeris_20210321.txt 22-Jun-2023 00:46 108239 dmsp_16_ephemeris_20210321.txt 22-Jun-2023 00:46 108197 dmsp_17_ephemeris_20210321.txt 22-Jun-2023 00:46 108149 dmsp_18_ephemeris_20210321.txt 22-Jun-2023 00:46 108193