../ dmsp_15_ephemeris_20211213.txt 22-Jun-2023 00:49 109315 dmsp_16_ephemeris_20211213.txt 22-Jun-2023 00:49 109348 dmsp_17_ephemeris_20211213.txt 22-Jun-2023 00:49 109259 dmsp_18_ephemeris_20211213.txt 22-Jun-2023 00:49 109338