../ dmsp_15_ephemeris_20121021.txt 22-Jun-2023 16:33 109488 dmsp_16_ephemeris_20121021.txt 22-Jun-2023 16:33 109533 dmsp_17_ephemeris_20121021.txt 22-Jun-2023 16:33 109555 dmsp_18_ephemeris_20121021.txt 22-Jun-2023 16:33 109493