../ dmsp_15_ephemeris_20110408.txt 22-Jun-2023 00:17 108305 dmsp_16_ephemeris_20110408.txt 22-Jun-2023 00:17 108274 dmsp_17_ephemeris_20110408.txt 22-Jun-2023 00:17 108301 dmsp_18_ephemeris_20110408.txt 22-Jun-2023 00:17 108231