../ dmsp_15_ephemeris_20200617.txt 22-Jun-2023 16:59 109638 dmsp_16_ephemeris_20200617.txt 22-Jun-2023 16:59 109629 dmsp_17_ephemeris_20200617.txt 22-Jun-2023 16:59 109505 dmsp_18_ephemeris_20200617.txt 22-Jun-2023 16:59 109483