../ dmsp_15_ephemeris_20201204.txt 22-Jun-2023 00:45 109353 dmsp_16_ephemeris_20201204.txt 22-Jun-2023 00:45 109322 dmsp_17_ephemeris_20201204.txt 22-Jun-2023 00:45 109259 dmsp_18_ephemeris_20201204.txt 22-Jun-2023 00:45 109277