../ dmsp_15_ephemeris_20170819.txt 22-Jun-2023 00:35 109524 dmsp_16_ephemeris_20170819.txt 22-Jun-2023 00:35 109613 dmsp_17_ephemeris_20170819.txt 22-Jun-2023 00:35 109688 dmsp_18_ephemeris_20170819.txt 22-Jun-2023 00:35 109684