../ dmsp_15_ephemeris_20210221.txt 22-Jun-2023 16:28 108240 dmsp_16_ephemeris_20210221.txt 22-Jun-2023 16:28 108090 dmsp_17_ephemeris_20210221.txt 22-Jun-2023 16:28 108054 dmsp_18_ephemeris_20210221.txt 22-Jun-2023 16:28 108160