../ dmsp_15_ephemeris_20180423.txt 22-Jun-2023 16:28 109440 dmsp_16_ephemeris_20180423.txt 22-Jun-2023 16:28 109538 dmsp_17_ephemeris_20180423.txt 22-Jun-2023 16:28 109774 dmsp_18_ephemeris_20180423.txt 22-Jun-2023 16:28 109679