../ dmsp_15_ephemeris_20120720.txt 22-Jun-2023 00:20 109632 dmsp_16_ephemeris_20120720.txt 22-Jun-2023 00:20 109603 dmsp_17_ephemeris_20120720.txt 22-Jun-2023 00:20 109737 dmsp_18_ephemeris_20120720.txt 22-Jun-2023 00:20 109631