../ dmsp_15_ephemeris_20211218.txt 22-Jun-2023 17:05 109317 dmsp_16_ephemeris_20211218.txt 22-Jun-2023 17:05 109317 dmsp_17_ephemeris_20211218.txt 22-Jun-2023 17:05 109294 dmsp_18_ephemeris_20211218.txt 22-Jun-2023 17:05 109279