// do we have same characteristics for all groups in a variable?
  private boolean testVariable(String name, List scans) {
    int datatype = name.equals("reflect") ? Level2Record.REFLECTIVITY : Level2Record.VELOCITY_HI;
    if (scans.size() == 0) {
      log.warn(" No data for = " + name);
      return false;
    }

    boolean ok = true;
    List firstScan = (List) scans.get(0);
    Level2Record firstRecord = (Level2Record) firstScan.get(0);
    dopplarResolution = firstRecord.resolution;

    if (debugGroups2)
      System.out.println(
          "Group "
              + Level2Record.getDatatypeName(datatype)
              + " ngates = "
              + firstRecord.getGateCount(datatype)
              + " start = "
              + firstRecord.getGateStart(datatype)
              + " size = "
              + firstRecord.getGateSize(datatype));

    for (int i = 1; i < scans.size(); i++) {
      List scan = (List) scans.get(i);
      Level2Record record = (Level2Record) scan.get(0);

      if ((datatype == Level2Record.VELOCITY_HI)
          && (record.resolution
              != firstRecord.resolution)) { // do all velocity resolutions match ??
        log.warn(
            name
                + " scan "
                + i
                + " diff resolutions = "
                + record.resolution
                + ", "
                + firstRecord.resolution
                + " elev= "
                + record.elevation_num
                + " "
                + record.getElevation());
        ok = false;
        hasDifferentDopplarResolutions = true;
      }

      if (record.getGateSize(datatype) != firstRecord.getGateSize(datatype)) {
        log.warn(
            name
                + " scan "
                + i
                + " diff gates size = "
                + record.getGateSize(datatype)
                + " "
                + firstRecord.getGateSize(datatype)
                + " elev= "
                + record.elevation_num
                + " "
                + record.getElevation());
        ok = false;

      } else if (debugGroups2)
        System.out.println(
            " ok gates size elev= " + record.elevation_num + " " + record.getElevation());

      if (record.getGateStart(datatype) != firstRecord.getGateStart(datatype)) {
        log.warn(
            name
                + " scan "
                + i
                + " diff gates start = "
                + record.getGateStart(datatype)
                + " "
                + firstRecord.getGateStart(datatype)
                + " elev= "
                + record.elevation_num
                + " "
                + record.getElevation());
        ok = false;

      } else if (debugGroups2)
        System.out.println(
            " ok gates start elev= " + record.elevation_num + " " + record.getElevation());

      if (record.message_type == 31) {
        hasHighResolutionData = true;
        // each data type
        if (record.hasHighResREFData) hasHighResolutionREF = true;
        if (record.hasHighResVELData) hasHighResolutionVEL = true;
        if (record.hasHighResSWData) hasHighResolutionSW = true;
        if (record.hasHighResZDRData) hasHighResolutionZDR = true;
        if (record.hasHighResPHIData) hasHighResolutionPHI = true;
        if (record.hasHighResRHOData) hasHighResolutionRHO = true;
      }
    }

    return ok;
  }
  private boolean testScan(String name, ArrayList group) {
    int datatype = name.equals("reflect") ? Level2Record.REFLECTIVITY : Level2Record.VELOCITY_HI;
    Level2Record first = (Level2Record) group.get(0);

    int n = group.size();
    if (debugScans) {
      boolean hasBoth = first.hasDopplerData && first.hasReflectData;
      System.out.println(
          name
              + " "
              + first
              + " has "
              + n
              + " radials resolution= "
              + first.resolution
              + " has both = "
              + hasBoth);
    }

    boolean ok = true;
    double sum = 0.0;
    double sum2 = 0.0;

    for (int i = 0; i < MAX_RADIAL; i++) radial[i] = 0;

    for (int i = 0; i < group.size(); i++) {
      Level2Record r = (Level2Record) group.get(i);

      /* this appears to be common - seems to be ok, we put missing values in
      if (r.getGateCount(datatype) != first.getGateCount(datatype)) {
        log.error(raf.getLocation()+" different number of gates ("+r.getGateCount(datatype)+
                "!="+first.getGateCount(datatype)+") in record "+name+ " "+r);
        ok = false;
      } */

      if (r.getGateSize(datatype) != first.getGateSize(datatype)) {
        log.warn(
            raf.getLocation()
                + " different gate size ("
                + r.getGateSize(datatype)
                + ") in record "
                + name
                + " "
                + r);
        ok = false;
      }
      if (r.getGateStart(datatype) != first.getGateStart(datatype)) {
        log.warn(
            raf.getLocation()
                + " different gate start ("
                + r.getGateStart(datatype)
                + ") in record "
                + name
                + " "
                + r);
        ok = false;
      }
      if (r.resolution != first.resolution) {
        log.warn(
            raf.getLocation()
                + " different resolution ("
                + r.resolution
                + ") in record "
                + name
                + " "
                + r);
        ok = false;
      }

      if ((r.radial_num < 0) || (r.radial_num >= MAX_RADIAL)) {
        log.info(
            raf.getLocation()
                + " radial out of range= "
                + r.radial_num
                + " in record "
                + name
                + " "
                + r);
        continue;
      }
      if (radial[r.radial_num] > 0) {
        log.warn(
            raf.getLocation()
                + " duplicate radial = "
                + r.radial_num
                + " in record "
                + name
                + " "
                + r);
        ok = false;
      }
      radial[r.radial_num] = r.recno + 1;

      sum += r.getElevation();
      sum2 += r.getElevation() * r.getElevation();
      // System.out.println("  elev="+r.getElevation()+" azi="+r.getAzimuth());
    }

    for (int i = 1; i < radial.length; i++) {
      if (0 == radial[i]) {
        if (n != (i - 1)) {
          log.warn(" missing radial(s)");
          ok = false;
        }
        break;
      }
    }

    double avg = sum / n;
    double sd = Math.sqrt((n * sum2 - sum * sum) / (n * (n - 1)));
    // System.out.println(" avg elev="+avg+" std.dev="+sd);

    return ok;
  }