../ dmsp_15_ephemeris_20211101.txt 22-Jun-2023 00:48 109457 dmsp_16_ephemeris_20211101.txt 22-Jun-2023 00:48 109487 dmsp_17_ephemeris_20211101.txt 22-Jun-2023 00:48 109494 dmsp_18_ephemeris_20211101.txt 22-Jun-2023 00:48 109476