../ dmsp_15_ephemeris_20180506.txt 22-Jun-2023 00:37 109469 dmsp_16_ephemeris_20180506.txt 22-Jun-2023 00:37 109547 dmsp_17_ephemeris_20180506.txt 22-Jun-2023 00:37 109655 dmsp_18_ephemeris_20180506.txt 22-Jun-2023 00:37 109637