../ dmsp_15_ephemeris_20121001.txt 22-Jun-2023 00:20 109584 dmsp_16_ephemeris_20121001.txt 22-Jun-2023 00:20 109630 dmsp_17_ephemeris_20121001.txt 22-Jun-2023 00:20 109628 dmsp_18_ephemeris_20121001.txt 22-Jun-2023 00:20 109600