../ dmsp_15_ephemeris_20180925.txt 22-Jun-2023 00:38 109612 dmsp_16_ephemeris_20180925.txt 22-Jun-2023 00:38 109594 dmsp_17_ephemeris_20180925.txt 22-Jun-2023 00:38 109600 dmsp_18_ephemeris_20180925.txt 22-Jun-2023 00:38 109639