001/*
002 * This file is part of McIDAS-V
003 *
004 * Copyright 2007-2016
005 * Space Science and Engineering Center (SSEC)
006 * University of Wisconsin - Madison
007 * 1225 W. Dayton Street, Madison, WI 53706, USA
008 * https://www.ssec.wisc.edu/mcidas
009 * 
010 * All Rights Reserved
011 * 
012 * McIDAS-V is built on Unidata's IDV and SSEC's VisAD libraries, and
013 * some McIDAS-V source code is based on IDV and VisAD source code.  
014 * 
015 * McIDAS-V is free software; you can redistribute it and/or modify
016 * it under the terms of the GNU Lesser Public License as published by
017 * the Free Software Foundation; either version 3 of the License, or
018 * (at your option) any later version.
019 * 
020 * McIDAS-V is distributed in the hope that it will be useful,
021 * but WITHOUT ANY WARRANTY; without even the implied warranty of
022 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
023 * GNU Lesser Public License for more details.
024 * 
025 * You should have received a copy of the GNU Lesser Public License
026 * along with this program.  If not, see http://www.gnu.org/licenses.
027 */
028package edu.wisc.ssec.mcidasv.data.hydra;
029
030import java.util.HashMap;
031
032/**
033 *
034 * 
035 */
036public class RadianceToBTbyLUT extends RangeProcessor {
037   
038   LUTtransform lutCal;
039   
040   
041   public RadianceToBTbyLUT(NetCDFFile reader, HashMap metadata, String radLUTname, String btLUTname) throws Exception {
042      super(reader, metadata);
043      
044      int numLUTvals = (reader.getDimensionLengths(radLUTname))[0];
045      float[] radLUT = reader.getFloatArray(radLUTname, new int[] {0}, new int[] {numLUTvals}, new int[] {1});
046      float[] btLUT = reader.getFloatArray(btLUTname, new int[] {0}, new int[] {numLUTvals}, new int[] {1});
047      
048      lutCal = new LUTtransform(radLUT, btLUT);
049   }
050   
051   public RadianceToBTbyLUT(NetCDFFile reader, HashMap metadata) throws Exception {
052      super(reader, metadata);
053   }
054   
055   /**
056    * calls super to unscale radiances then converts to BT
057    * 
058    */
059   public float[] processRange(short[] values, HashMap subset) {
060      float[] radiances = super.processRange(values, subset);
061      
062      float[] brightnessTemps = null;
063      
064      try {
065         brightnessTemps = lutCal.radianceToBrightnessTemp(radiances);
066      }
067      catch (Exception e) {
068         e.printStackTrace();
069      }
070      
071      return brightnessTemps;
072   }
073}