../ dmsp_15_ephemeris_20121021.txt 22-Jun-2023 00:20 109488 dmsp_16_ephemeris_20121021.txt 22-Jun-2023 00:20 109533 dmsp_17_ephemeris_20121021.txt 22-Jun-2023 00:20 109555 dmsp_18_ephemeris_20121021.txt 22-Jun-2023 00:20 109493