../ dmsp_15_ephemeris_20121213.txt 22-Jun-2023 00:21 109335 dmsp_16_ephemeris_20121213.txt 22-Jun-2023 00:21 109278 dmsp_17_ephemeris_20121213.txt 22-Jun-2023 00:21 109333 dmsp_18_ephemeris_20121213.txt 22-Jun-2023 00:21 109385