isultrasonic()

bool datrw::su::SUheader::isultrasonic

(

)

const

true if header defines sampling of ultrasonic data

true if header defines ultrasonic data sampling

Definition at line 166 of file suheader.cc.

References datrw::su::TraceHeaderStruct::d1, DATRW_assert, datrw::su::TraceHeaderStruct::dt, Mheader, datrw::su::subformat::def::thresholdcmp, and datrw::su::subformat::def::thresholdzero.

Referenced by delay(), and dt().

    {
      bool retval=false;
      DATRW_assert(Mheader.d1>=0.,
                   "negative d1 value (header byte offset 180) is illegal");
      if (Mheader.d1 > subformat::def::thresholdzero)
      {
        float seismicdt=static_cast<double>(Mheader.dt)*1.e-6;
        float ultrasonicdt=static_cast<double>(Mheader.dt)*1.e-9;
        float seismicres=1.-(seismicdt/Mheader.d1);
        float ultrasonicres=1.-(ultrasonicdt/Mheader.d1);
        seismicres=seismicres<0 ? -seismicres : seismicres;
        ultrasonicres=ultrasonicres<0 ? -ultrasonicres : ultrasonicres;
        if (seismicres > subformat::def::thresholdcmp)
        {
          DATRW_assert(ultrasonicres < subformat::def::thresholdcmp,
                       "d1 value (header byte offset 180) neither matches "
                       "seismic nor ultrasonic data");
          retval=true;
        }
      }
      return(retval);
    } // bool SUheader::isultrasonic() const

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