001/*
002 * This file is part of McIDAS-V
003 *
004 * Copyright 2007-2025
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 https://www.gnu.org/licenses/.
027 */
028package edu.wisc.ssec.mcidasv.data.hydra;
029
030import java.util.Map;
031
032import org.slf4j.Logger;
033import org.slf4j.LoggerFactory;
034
035/**
036 *
037 * 
038 */
039public class RadianceToBTbyLUT extends RangeProcessor {
040   
041   private static final Logger logger =
042       LoggerFactory.getLogger(RadianceToBTbyLUT.class);
043   
044   LUTtransform lutCal;
045   
046   
047   public RadianceToBTbyLUT(NetCDFFile reader, Map<String, Object> metadata, String radLUTname, String btLUTname) throws Exception {
048      super(reader, metadata);
049      
050      int numLUTvals = (reader.getDimensionLengths(radLUTname))[0];
051      float[] radLUT = reader.getFloatArray(radLUTname, new int[] {0}, new int[] {numLUTvals}, new int[] {1});
052      float[] btLUT = reader.getFloatArray(btLUTname, new int[] {0}, new int[] {numLUTvals}, new int[] {1});
053      
054      lutCal = new LUTtransform(radLUT, btLUT);
055   }
056   
057   public RadianceToBTbyLUT(NetCDFFile reader, Map<String, Object> metadata) throws Exception {
058      super(reader, metadata);
059   }
060   
061   /**
062    * calls super to unscale radiances then converts to BT
063    * 
064    */
065   public float[] processRange(short[] values, Map<String, double[]> subset) {
066      float[] radiances = super.processRange(values, subset);
067      
068      float[] brightnessTemps = null;
069      
070      try {
071         brightnessTemps = lutCal.radianceToBrightnessTemp(radiances);
072      } catch (Exception e) {
073         logger.error("Problem processing range", e);
074      }
075      
076      return brightnessTemps;
077   }
078}