../ dmsp_15_ephemeris_20110911.txt 22-Jun-2023 00:18 109680 dmsp_16_ephemeris_20110911.txt 22-Jun-2023 00:18 109600 dmsp_17_ephemeris_20110911.txt 22-Jun-2023 00:18 109703 dmsp_18_ephemeris_20110911.txt 22-Jun-2023 00:18 109716