Reference for the unit of data in sac files about hinetpy HOT 2 CLOSED

    for (i = 0; i < npts; i++) {                                                        
        if (giKunit == 1 || giKunit == 2) { /** m/s or m/s/s **/                        
            yfunc[i] = yfunc[i] * sense * 1000000000.0; /** nm/s or nm/s/s **/          
        } else if (giKunit == 3) { /** rad **/                                          
            yfunc[i] = yfunc[i] * sense * 1000000.0;  /** micro rad **/                 
        } else {                                                                        
            yfunc[i] = yfunc[i] * sense;                                                
        }                                                                               
    }

sense = (adc / (float) pow(10.0, (double) gain / 20.0)) / (float) vu;