S1A_IW_SLC__1SDV_20200117T101345_20200117T101412_030839_0389D1_2D10.SAFE
S1A_IW_SLC__1SDV_20200129T101345_20200129T101412_031014_038FF8_EC79.SAFE
S1A_IW_SLC__1SDV_20200210T101345_20200210T101412_031189_039611_F087.SAFE
S1A_IW_SLC__1SDV_20200222T101344_20200222T101411_031364_039C17_448F.SAFE
S1A_IW_SLC__1SDV_20200305T101344_20200305T101411_031539_03A223_105D.SAFE
S1A_IW_SLC__1SDV_20200317T101345_20200317T101412_031714_03A833_89CF.SAFE
S1A_IW_SLC__1SDV_20200329T101345_20200329T101412_031889_03AE5B_784C.SAFE
S1A_IW_SLC__1SDV_20200410T101345_20200410T101412_032064_03B48B_E775.SAFE
S1A_IW_SLC__1SDV_20200422T101345_20200422T101412_032239_03BAAD_28FC.SAFE
S1A_IW_SLC__1SDV_20200504T101346_20200504T101413_032414_03C0D9_51AB.SAFE
S1A_IW_SLC__1SDV_20200516T101347_20200516T101414_032589_03C64C_1049.SAFE
S1A_IW_SLC__1SDV_20200528T101348_20200528T101414_032764_03CB94_A733.SAFE
S1A_IW_SLC__1SDV_20200609T101348_20200609T101415_032939_03D0BE_1D89.SAFE
S1A_IW_SLC__1SDV_20200621T101349_20200621T101416_033114_03D60C_786B.SAFE
S1A_IW_SLC__1SDV_20200703T101349_20200703T101416_033289_03DB5D_780E.SAFE
S1A_IW_SLC__1SDV_20200715T101350_20200715T101417_033464_03E0B4_CA2C.SAFE
S1A_IW_SLC__1SDV_20200727T101351_20200727T101418_033639_03E612_4DD2.SAFE
S1A_IW_SLC__1SDV_20200808T101352_20200808T101419_033814_03EB9C_8C5A.SAFE
S1A_IW_SLC__1SDV_20200820T101352_20200820T101419_033989_03F1BE_D1D6.SAFE
S1A_IW_SLC__1SDV_20200901T101353_20200901T101420_034164_03F7ED_1BA0.SAFE
S1A_IW_SLC__1SDV_20200913T101354_20200913T101421_034339_03FE0D_D733.SAFE
S1A_IW_SLC__1SDV_20200925T101354_20200925T101421_034514_040436_2C4F.SAFE
S1A_IW_SLC__1SDV_20201007T101354_20201007T101421_034689_040A5B_B09D.SAFE
S1A_IW_SLC__1SDV_20201019T101354_20201019T101421_034864_04107F_D15A.SAFE
S1A_IW_SLC__1SDV_20201031T101354_20201031T101421_035039_041673_4C5A.SAFE
S1A_IW_SLC__1SDV_20201112T101354_20201112T101421_035214_041C91_AF85.SAFE
S1A_IW_SLC__1SDV_20201124T101354_20201124T101421_035389_04229A_55EC.SAFE
S1A_IW_SLC__1SDV_20201206T101353_20201206T101420_035564_0428A2_E102.SAFE
S1A_IW_SLC__1SDV_20201218T101353_20201218T101420_035739_042EA4_B3CF.SAFE
grep -E "[0-9]{8}" 1.txt -o | uniq
用bat脚本，参考一下：https://blog.csdn.net/sinat_25873421/article/details/79623474
如果对你有帮助，可以点击我这个回答右上方的【采纳】按钮，给我个采纳吗，谢谢
两个命令都可以实现
cat s1a_tab | awk -F '_' '{print $6}' | awk -F 'T' '{print $1}' > date_tab
grep -E "[0-9]{8}" s1a_tab -o | uniq > date_tab