../ dmsp_15_ephemeris_20121004.txt 22-Jun-2023 00:20 109578 dmsp_16_ephemeris_20121004.txt 22-Jun-2023 00:20 109606 dmsp_17_ephemeris_20121004.txt 22-Jun-2023 00:20 109646 dmsp_18_ephemeris_20121004.txt 22-Jun-2023 00:20 109668