../ dmsp_15_ephemeris_20121204.txt 22-Jun-2023 00:21 109373 dmsp_16_ephemeris_20121204.txt 22-Jun-2023 00:21 109353 dmsp_17_ephemeris_20121204.txt 22-Jun-2023 00:21 109259 dmsp_18_ephemeris_20121204.txt 22-Jun-2023 00:21 109378