../ dmsp_15_ephemeris_20121112.txt 22-Jun-2023 00:21 109538 dmsp_16_ephemeris_20121112.txt 22-Jun-2023 00:21 109359 dmsp_17_ephemeris_20121112.txt 22-Jun-2023 00:21 109322 dmsp_18_ephemeris_20121112.txt 22-Jun-2023 00:21 109413