../ dmsp_15_ephemeris_20190915.txt 22-Jun-2023 00:41 109638 dmsp_16_ephemeris_20190915.txt 22-Jun-2023 00:41 109681 dmsp_17_ephemeris_20190915.txt 22-Jun-2023 00:41 109637 dmsp_18_ephemeris_20190915.txt 22-Jun-2023 00:41 109652