../ dmsp_15_ephemeris_20180724.txt 22-Jun-2023 00:37 109485 dmsp_16_ephemeris_20180724.txt 22-Jun-2023 00:37 109470 dmsp_17_ephemeris_20180724.txt 22-Jun-2023 00:37 109641 dmsp_18_ephemeris_20180724.txt 22-Jun-2023 00:37 109501