../ dmsp_15_ephemeris_20211129.txt 22-Jun-2023 00:49 109503 dmsp_16_ephemeris_20211129.txt 22-Jun-2023 00:49 109382 dmsp_17_ephemeris_20211129.txt 22-Jun-2023 00:49 109470 dmsp_18_ephemeris_20211129.txt 22-Jun-2023 00:49 109255