../ dmsp_15_ephemeris_20121009.txt 22-Jun-2023 00:20 109616 dmsp_16_ephemeris_20121009.txt 22-Jun-2023 00:20 109580 dmsp_17_ephemeris_20121009.txt 22-Jun-2023 00:20 109542 dmsp_18_ephemeris_20121009.txt 22-Jun-2023 00:20 109702