../ dmsp_15_ephemeris_20190308.txt 22-Jun-2023 00:40 108206 dmsp_16_ephemeris_20190308.txt 22-Jun-2023 00:40 108205 dmsp_17_ephemeris_20190308.txt 22-Jun-2023 00:40 108254 dmsp_18_ephemeris_20190308.txt 22-Jun-2023 00:40 108090