/**
   * Getting dataset for a single radar station.
   *
   * @param stnName radar station name
   * @param absTime is absolute time
   * @return RadialDatasetSweep object
   * @throws IOException java io exception
   */
  public RadialDatasetSweep getRadarDataset(String stnName, Date absTime) throws IOException {
    // absTime is a member of  datasetsDateURI
    InvDataset invdata = queryRadarStation(stnName, absTime);

    if (invdata == null) {
      throw new IOException("Invalid time selected: " + absTime.toString() + "\n");
    }

    ThreddsDataFactory tdFactory = new ThreddsDataFactory();
    ThreddsDataFactory.Result result;

    result = tdFactory.openFeatureDataset(invdata, null);

    return (RadialDatasetSweep) result.featureDataset;
  }
  /**
   * Getting URI for a single radar station.
   *
   * @param stnName radar station name
   * @param absTime is absolute time
   * @return URI
   * @throws IOException java io exception
   */
  public URI getRadarDatasetURI(String stnName, Date absTime) throws IOException {
    // absTime is a member of  datasetsDateURI
    InvDataset invdata = queryRadarStation(stnName, absTime);
    /*  List dsets = idata.getDatasets();
    int siz = dsets.size();
    if(siz != 1)
        return null;

    InvDataset invdata = (InvDataset)dsets.get(0);     */
    List acess = invdata.getAccess();
    InvAccess ia = (InvAccess) acess.get(0);
    URI ui = ia.getStandardUri();

    if (ui == null) {
      throw new IOException("Invalid time selected: " + absTime.toString() + "\n");
    }

    return ui;
  }