../ dmsp_15_ephemeris_20110930.txt 22-Jun-2023 00:18 109547 dmsp_16_ephemeris_20110930.txt 22-Jun-2023 00:18 109453 dmsp_17_ephemeris_20110930.txt 22-Jun-2023 00:18 109641 dmsp_18_ephemeris_20110930.txt 22-Jun-2023 00:18 109624