../ dmsp_15_ephemeris_20110920.txt 22-Jun-2023 00:18 109633 dmsp_16_ephemeris_20110920.txt 22-Jun-2023 00:18 109687 dmsp_17_ephemeris_20110920.txt 22-Jun-2023 00:18 109593 dmsp_18_ephemeris_20110920.txt 22-Jun-2023 00:18 109728