../ dmsp_15_ephemeris_20211101.txt 22-Jun-2023 16:37 109457 dmsp_16_ephemeris_20211101.txt 22-Jun-2023 16:37 109487 dmsp_17_ephemeris_20211101.txt 22-Jun-2023 16:37 109494 dmsp_18_ephemeris_20211101.txt 22-Jun-2023 16:37 109476