../ dmsp_15_ephemeris_20211028.txt 22-Jun-2023 16:36 109503 dmsp_16_ephemeris_20211028.txt 22-Jun-2023 16:36 109519 dmsp_17_ephemeris_20211028.txt 22-Jun-2023 16:36 109513 dmsp_18_ephemeris_20211028.txt 22-Jun-2023 16:36 109477