../ dmsp_15_ephemeris_20110531.txt 22-Jun-2023 00:17 109610 dmsp_16_ephemeris_20110531.txt 22-Jun-2023 00:17 109627 dmsp_17_ephemeris_20110531.txt 22-Jun-2023 00:17 109593 dmsp_18_ephemeris_20110531.txt 22-Jun-2023 00:17 109589