../ dmsp_15_ephemeris_20211026.txt 22-Jun-2023 00:48 109483 dmsp_16_ephemeris_20211026.txt 22-Jun-2023 00:48 109542 dmsp_17_ephemeris_20211026.txt 22-Jun-2023 00:48 109537 dmsp_18_ephemeris_20211026.txt 22-Jun-2023 00:48 109515