../ dmsp_15_ephemeris_20180511.txt 22-Jun-2023 16:52 109518 dmsp_16_ephemeris_20180511.txt 22-Jun-2023 16:52 109622 dmsp_17_ephemeris_20180511.txt 22-Jun-2023 16:52 109631 dmsp_18_ephemeris_20180511.txt 22-Jun-2023 16:52 109485