../ dmsp_15_ephemeris_20120711.txt 22-Jun-2023 00:20 109498 dmsp_16_ephemeris_20120711.txt 22-Jun-2023 00:20 109639 dmsp_17_ephemeris_20120711.txt 22-Jun-2023 00:20 109603 dmsp_18_ephemeris_20120711.txt 22-Jun-2023 00:20 109453