../ dmsp_15_ephemeris_20121209.txt 22-Jun-2023 00:21 109375 dmsp_16_ephemeris_20121209.txt 22-Jun-2023 00:21 109271 dmsp_17_ephemeris_20121209.txt 22-Jun-2023 00:21 109304 dmsp_18_ephemeris_20121209.txt 22-Jun-2023 00:21 109416