private void makeCoordinateDataWithMissing(
      int datatype,
      Variable time,
      Variable elev,
      Variable azi,
      Variable nradialsVar,
      Variable ngatesVar,
      List groups) {

    Array timeData = Array.factory(time.getDataType().getPrimitiveClassType(), time.getShape());
    Index timeIndex = timeData.getIndex();

    Array elevData = Array.factory(elev.getDataType().getPrimitiveClassType(), elev.getShape());
    Index elevIndex = elevData.getIndex();

    Array aziData = Array.factory(azi.getDataType().getPrimitiveClassType(), azi.getShape());
    Index aziIndex = aziData.getIndex();

    Array nradialsData =
        Array.factory(nradialsVar.getDataType().getPrimitiveClassType(), nradialsVar.getShape());
    IndexIterator nradialsIter = nradialsData.getIndexIterator();

    Array ngatesData =
        Array.factory(ngatesVar.getDataType().getPrimitiveClassType(), ngatesVar.getShape());
    IndexIterator ngatesIter = ngatesData.getIndexIterator();

    // first fill with missing data
    IndexIterator ii = timeData.getIndexIterator();
    while (ii.hasNext()) ii.setIntNext(MISSING_INT);

    ii = elevData.getIndexIterator();
    while (ii.hasNext()) ii.setFloatNext(MISSING_FLOAT);

    ii = aziData.getIndexIterator();
    while (ii.hasNext()) ii.setFloatNext(MISSING_FLOAT);

    // now set the  coordinate variables from the Cinrad2Record radial
    int last_msecs = Integer.MIN_VALUE;
    int nscans = groups.size();
    try {
      for (int scan = 0; scan < nscans; scan++) {
        List scanGroup = (List) groups.get(scan);
        int nradials = scanGroup.size();

        Cinrad2Record first = null;
        for (int j = 0; j < nradials; j++) {
          Cinrad2Record r = (Cinrad2Record) scanGroup.get(j);
          if (first == null) first = r;

          int radial = r.radial_num - 1;
          timeData.setInt(timeIndex.set(scan, radial), r.data_msecs);
          elevData.setFloat(elevIndex.set(scan, radial), r.getElevation());
          aziData.setFloat(aziIndex.set(scan, radial), r.getAzimuth());

          if (r.data_msecs < last_msecs)
            logger.warn("makeCoordinateData time out of order " + r.data_msecs);
          last_msecs = r.data_msecs;
        }

        nradialsIter.setIntNext(nradials);
        ngatesIter.setIntNext(first.getGateCount(datatype));
      }
    } catch (java.lang.ArrayIndexOutOfBoundsException ae) {
      logger.debug("Cinrad2IOSP.uncompress ", ae);
    }
    time.setCachedData(timeData, false);
    elev.setCachedData(elevData, false);
    azi.setCachedData(aziData, false);
    nradialsVar.setCachedData(nradialsData, false);
    ngatesVar.setCachedData(ngatesData, false);
  }
  private void makeCoordinateData(
      int datatype,
      Variable time,
      Variable elev,
      Variable azi,
      Variable nradialsVar,
      Variable ngatesVar,
      List groups) {

    Array timeData = Array.factory(time.getDataType().getPrimitiveClassType(), time.getShape());
    IndexIterator timeDataIter = timeData.getIndexIterator();

    Array elevData = Array.factory(elev.getDataType().getPrimitiveClassType(), elev.getShape());
    IndexIterator elevDataIter = elevData.getIndexIterator();

    Array aziData = Array.factory(azi.getDataType().getPrimitiveClassType(), azi.getShape());
    IndexIterator aziDataIter = aziData.getIndexIterator();

    Array nradialsData =
        Array.factory(nradialsVar.getDataType().getPrimitiveClassType(), nradialsVar.getShape());
    IndexIterator nradialsIter = nradialsData.getIndexIterator();

    Array ngatesData =
        Array.factory(ngatesVar.getDataType().getPrimitiveClassType(), ngatesVar.getShape());
    IndexIterator ngatesIter = ngatesData.getIndexIterator();

    int last_msecs = Integer.MIN_VALUE;
    int nscans = groups.size();
    int maxRadials = volScan.getMaxRadials();
    for (int i = 0; i < nscans; i++) {
      List scanGroup = (List) groups.get(i);
      int nradials = scanGroup.size();

      Cinrad2Record first = null;
      for (int j = 0; j < nradials; j++) {
        Cinrad2Record r = (Cinrad2Record) scanGroup.get(j);
        if (first == null) first = r;

        timeDataIter.setIntNext(r.data_msecs);
        elevDataIter.setFloatNext(r.getElevation());
        aziDataIter.setFloatNext(r.getAzimuth());

        if (r.data_msecs < last_msecs)
          logger.warn("makeCoordinateData time out of order " + r.data_msecs);
        last_msecs = r.data_msecs;
      }

      for (int j = nradials; j < maxRadials; j++) {
        timeDataIter.setIntNext(MISSING_INT);
        elevDataIter.setFloatNext(MISSING_FLOAT);
        aziDataIter.setFloatNext(MISSING_FLOAT);
      }

      nradialsIter.setIntNext(nradials);
      ngatesIter.setIntNext(first.getGateCount(datatype));
    }

    time.setCachedData(timeData, false);
    elev.setCachedData(elevData, false);
    azi.setCachedData(aziData, false);
    nradialsVar.setCachedData(nradialsData, false);
    ngatesVar.setCachedData(ngatesData, false);
  }