../ dmsp_15_ephemeris_20120506.txt 22-Jun-2023 00:19 109478 dmsp_16_ephemeris_20120506.txt 22-Jun-2023 00:19 109716 dmsp_17_ephemeris_20120506.txt 22-Jun-2023 00:19 109688 dmsp_18_ephemeris_20120506.txt 22-Jun-2023 00:19 109753