../ dmsp_15_ephemeris_20120731.txt 22-Jun-2023 00:20 109483 dmsp_16_ephemeris_20120731.txt 22-Jun-2023 00:20 109656 dmsp_17_ephemeris_20120731.txt 22-Jun-2023 00:20 109712 dmsp_18_ephemeris_20120731.txt 22-Jun-2023 00:20 109507