../ dmsp_15_ephemeris_20110401.txt 22-Jun-2023 00:17 108266 dmsp_16_ephemeris_20110401.txt 22-Jun-2023 00:17 108243 dmsp_17_ephemeris_20110401.txt 22-Jun-2023 00:17 108247 dmsp_18_ephemeris_20110401.txt 22-Jun-2023 00:17 108320