../ dmsp_15_ephemeris_20110511.txt 22-Jun-2023 00:17 109525 dmsp_16_ephemeris_20110511.txt 22-Jun-2023 00:17 109652 dmsp_17_ephemeris_20110511.txt 22-Jun-2023 00:17 109607 dmsp_18_ephemeris_20110511.txt 22-Jun-2023 00:17 109564