Program: 11474
Project: 11474
Buggy source:
public double applyCalibration(final double v,final double rangeIndex,final double azimuthIndex,final double slantRange,final double satelliteHeight,final double sceneToEarthCentre,final double localIncidenceAngle,final String bandPolar,final Unit.UnitType bandUnit,int[] subSwathIndex){
  final String targetBandName="String_Node_Str" + bandPolar.toUpperCase();
  final CalibrationInfo calInfo=targetBandToCalInfo.get(targetBandName);
  final int calVecIdx=calInfo.getCalibrationVectorIndex((int)azimuthIndex);
  final Sentinel1Utils.CalibrationVector vec0=calInfo.getCalibrationVector(calVecIdx);
  final Sentinel1Utils.CalibrationVector vec1=calInfo.getCalibrationVector(calVecIdx + 1);
  final CALTYPE calType=getCalibrationType(targetBandName);
  final float[] vec0LUT=getVector(calType,vec0);
  final float[] vec1LUT=getVector(calType,vec1);
  final int pixelIdx=calInfo.getPixelIndex((int)rangeIndex,calVecIdx);
  final double azTime=calInfo.firstLineTime + azimuthIndex * calInfo.lineTimeInterval;
  final double muY=(azTime - vec0.timeMJD) / (vec1.timeMJD - vec0.timeMJD);
  final double muX=(rangeIndex - vec0.pixels[pixelIdx]) / (double)(vec0.pixels[pixelIdx + 1] - vec0.pixels[pixelIdx]);
  final double lutVal=(1 - muY) * ((1 - muX) * vec0LUT[pixelIdx] + muX * vec0LUT[pixelIdx + 1]) + muY * ((1 - muX) * vec1LUT[pixelIdx] + muX * vec1LUT[pixelIdx + 1]);
  double sigma=0.0;
  if (bandUnit == Unit.UnitType.AMPLITUDE) {
    sigma=v * v / (lutVal * lutVal);
  }
 else   if (bandUnit == Unit.UnitType.INTENSITY) {
    sigma=v / (lutVal * lutVal);
  }
 else   if (bandUnit == Unit.UnitType.INTENSITY_DB) {
    sigma=FastMath.pow(10,v / 10.0) / (lutVal * lutVal);
  }
 else   if (bandUnit == Unit.UnitType.REAL || bandUnit == Unit.UnitType.IMAGINARY) {
    sigma=v / lutVal;
  }
 else {
    throw new OperatorException("String_Node_Str");
  }
  return sigma;
}

Fixed version (ground truth):
public double applyCalibration(final double v,final double rangeIndex,final double azimuthIndex,final double slantRange,final double satelliteHeight,final double sceneToEarthCentre,final double localIncidenceAngle,final String bandName,final String bandPolar,final Unit.UnitType bandUnit,int[] subSwathIndex){
  final CalibrationInfo calInfo=targetBandToCalInfo.get(bandName);
  final int calVecIdx=calInfo.getCalibrationVectorIndex((int)azimuthIndex);
  final Sentinel1Utils.CalibrationVector vec0=calInfo.getCalibrationVector(calVecIdx);
  final Sentinel1Utils.CalibrationVector vec1=calInfo.getCalibrationVector(calVecIdx + 1);
  final CALTYPE calType=getCalibrationType(bandName);
  final float[] vec0LUT=getVector(calType,vec0);
  final float[] vec1LUT=getVector(calType,vec1);
  final int pixelIdx=calInfo.getPixelIndex((int)rangeIndex,calVecIdx);
  final double azTime=calInfo.firstLineTime + azimuthIndex * calInfo.lineTimeInterval;
  final double muY=(azTime - vec0.timeMJD) / (vec1.timeMJD - vec0.timeMJD);
  final double muX=(rangeIndex - vec0.pixels[pixelIdx]) / (double)(vec0.pixels[pixelIdx + 1] - vec0.pixels[pixelIdx]);
  final double lutVal=(1 - muY) * ((1 - muX) * vec0LUT[pixelIdx] + muX * vec0LUT[pixelIdx + 1]) + muY * ((1 - muX) * vec1LUT[pixelIdx] + muX * vec1LUT[pixelIdx + 1]);
  double sigma=0.0;
  if (bandUnit == Unit.UnitType.AMPLITUDE) {
    sigma=v * v / (lutVal * lutVal);
  }
 else   if (bandUnit == Unit.UnitType.INTENSITY) {
    sigma=v / (lutVal * lutVal);
  }
 else   if (bandUnit == Unit.UnitType.INTENSITY_DB) {
    sigma=FastMath.pow(10,v / 10.0) / (lutVal * lutVal);
  }
 else   if (bandUnit == Unit.UnitType.REAL || bandUnit == Unit.UnitType.IMAGINARY) {
    sigma=v / lutVal;
  }
 else {
    throw new OperatorException("String_Node_Str");
  }
  return sigma;
}