private void readOneScan(
     Cinrad2Record[] mapScan, Range radialRange, Range gateRange, int datatype, IndexIterator ii)
     throws IOException {
   for (int i = radialRange.first(); i <= radialRange.last(); i += radialRange.stride()) {
     Cinrad2Record r = mapScan[i];
     readOneRadial(r, datatype, gateRange, ii);
   }
 }
 private void readOneRadial(Cinrad2Record r, int datatype, Range gateRange, IndexIterator ii)
     throws IOException {
   if (r == null) {
     for (int i = gateRange.first(); i <= gateRange.last(); i += gateRange.stride())
       ii.setByteNext(Cinrad2Record.MISSING_DATA);
     return;
   }
   r.readData(volScan.raf, datatype, gateRange, ii);
 }
  public Array readData(Variable v2, Section section) throws IOException, InvalidRangeException {
    Vgroup vgroup = (Vgroup) v2.getSPobject();

    Range scanRange = section.getRange(0);
    Range radialRange = section.getRange(1);
    Range gateRange = section.getRange(2);

    Array data = Array.factory(v2.getDataType().getPrimitiveClassType(), section.getShape());
    IndexIterator ii = data.getIndexIterator();

    for (int i = scanRange.first(); i <= scanRange.last(); i += scanRange.stride()) {
      Cinrad2Record[] mapScan = vgroup.map[i];
      readOneScan(mapScan, radialRange, gateRange, vgroup.datatype, ii);
    }

    return data;
  }