../ dmsp_15_ephemeris_20210704.txt 22-Jun-2023 00:47 109510 dmsp_16_ephemeris_20210704.txt 22-Jun-2023 00:47 109513 dmsp_17_ephemeris_20210704.txt 22-Jun-2023 00:47 109448 dmsp_18_ephemeris_20210704.txt 22-Jun-2023 00:47 109550