../ dmsp_15_ephemeris_20190511.txt 22-Jun-2023 00:40 109590 dmsp_16_ephemeris_20190511.txt 22-Jun-2023 00:40 109586 dmsp_17_ephemeris_20190511.txt 22-Jun-2023 00:40 109596 dmsp_18_ephemeris_20190511.txt 22-Jun-2023 00:40 109508