Differences

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--- tutorials:first_steps [2019/07/25 10:28] – [Getting some help] seisunix
+++ tutorials:first_steps [2019/08/03 22:08] – [Data input and output] seisunix
@@ Line 7: / Line 7: @@
 <WRAP box 800px round center centeralign>
-''segyread tape=test.segy > test.su''
+''segyread tape=test.segy verbose=1 | segyclean > test.su''
 </WRAP>
@@ Line 23: / Line 23: @@
 For example:
 <WRAP box 800px round center centeralign>
-''sufilter f=10,20,150,200 <data_to_be_filtered.su >filtered_data.su''
+''sufilter f=10,20,150,200 amps=0,1,1,0 <data_to_be_filtered.su >bandpass_data.su''
 </WRAP>
-will apply a band-pass filter to a SU data file and store the result in an other data file.
+will apply a band-pass filter to a SU data file and store the result in an other data file,
+<WRAP box 800px round center centeralign>
+''sufilter f=10,20,150,200 amps=1,1,0,0 <data_to_be_filtered.su >low_pass_data.su''
+</WRAP>
+will apply a low pass filter, and
+<WRAP box 800px round center centeralign>
+''sufilter f=10,20,150,200 amps=0,0,1,1 <data_to_be_filtered.su >high_pass_data.su''
+</WRAP>
 As other UNIX tools, SU tools can be linked with the pipe mechanism.
@@ Line 36: / Line 46: @@
 </WRAP>
-''suwind'' reads the file other_data.su, keeps only the first 10 traces and its stdout is linked to the stdin of ''sufilter'' whose stdout is redirected into the file new_su_file.su.
+''suwind'' reads the file other_data.su, keeps only the first 10 traces and its stdout is linked to the stdin of ''sufilter'' whose stdout is redirected into the file new_su_file.su.The default filter is a trapezoidal bandpass filter.
 <WRAP info>
 if you are running SU on a multicore/multiprocessor computer with shared memory, the tasks will be distributed by the operating system to different cores/processors.
 </WRAP>
 ===== Structure of a SU command =====