../ dmsp_15_ephemeris_20110503.txt 22-Jun-2023 00:17 109593 dmsp_16_ephemeris_20110503.txt 22-Jun-2023 00:17 109648 dmsp_17_ephemeris_20110503.txt 22-Jun-2023 00:17 109551 dmsp_18_ephemeris_20110503.txt 22-Jun-2023 00:17 109593