../ dmsp_15_ephemeris_20211206.txt 22-Jun-2023 00:49 109370 dmsp_16_ephemeris_20211206.txt 22-Jun-2023 00:49 109430 dmsp_17_ephemeris_20211206.txt 22-Jun-2023 00:49 109296 dmsp_18_ephemeris_20211206.txt 22-Jun-2023 00:49 109447