../ dmsp_15_ephemeris_20211007.txt 22-Jun-2023 00:48 109539 dmsp_16_ephemeris_20211007.txt 22-Jun-2023 00:48 109537 dmsp_17_ephemeris_20211007.txt 22-Jun-2023 00:48 109588 dmsp_18_ephemeris_20211007.txt 22-Jun-2023 00:48 109524