| | \n\n \n \n \n approx=true | \tuse Tieyuan\'s approximation \n | \n \n\n \n \n \n c0= | \treference velocity \n | \n \n\n \n \n \n dt= | \ttime step \n | \n \n\n \n \n \n eps=1.e-4 | \ttolerance \n | \n \n\n \n \n \n file fft= | \tauxiliary input file name \n | \n \n\n \n \n \n file left= | \tauxiliary output file name \n | \n \n\n \n \n \n mode=0 | \tmode of propagation: 0 is viscoacoustic (default); 1 is loss-dominated; 2 is dispersion dominated; 3 is acoustic \n | \n \n\n \n \n \n npk=20 | \tmaximum rank \n | \n \n\n \n \n \n rev=false | \treverse propagation \n | \n \n\n \n \n \n seed=time(NULL | \t \n | \n \n\n \n \n \n sign=0 | \tsign of solution: 0 is positive, 1 is negative \n | \n \n\n \n \n \n w0= | \treference frequency \n | \n \n |