../ dmsp_15_ephemeris_20110919.txt 22-Jun-2023 00:18 109685 dmsp_16_ephemeris_20110919.txt 22-Jun-2023 00:18 109641 dmsp_17_ephemeris_20110919.txt 22-Jun-2023 00:18 109590 dmsp_18_ephemeris_20110919.txt 22-Jun-2023 00:18 109764