../ dmsp_15_ephemeris_20180721.txt 22-Jun-2023 00:37 109539 dmsp_16_ephemeris_20180721.txt 22-Jun-2023 00:37 109563 dmsp_17_ephemeris_20180721.txt 22-Jun-2023 00:37 109669 dmsp_18_ephemeris_20180721.txt 22-Jun-2023 00:37 109594