IonoModel.hpp

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#pragma ident "$Id: IonoModel.hpp 164 2006-09-29 16:57:16Z architest $"



#ifndef GPSTK_IONOMODEL_HPP
#define GPSTK_IONOMODEL_HPP

//============================================================================
//
//  This file is part of GPSTk, the GPS Toolkit.
//
//  The GPSTk is free software; you can redistribute it and/or modify
//  it under the terms of the GNU Lesser General Public License as published
//  by the Free Software Foundation; either version 2.1 of the License, or
//  any later version.
//
//  The GPSTk is distributed in the hope that it will be useful,
//  but WITHOUT ANY WARRANTY; without even the implied warranty of
//  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
//  GNU Lesser General Public License for more details.
//
//  You should have received a copy of the GNU Lesser General Public
//  License along with GPSTk; if not, write to the Free Software Foundation,
//  Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
//  
//  Copyright 2004, The University of Texas at Austin
//
//============================================================================

//============================================================================
//
//This software developed by Applied Research Laboratories at the University of
//Texas at Austin, under contract to an agency or agencies within the U.S. 
//Department of Defense. The U.S. Government retains all rights to use,
//duplicate, distribute, disclose, or release this software. 
//
//Pursuant to DoD Directive 523024 
//
// DISTRIBUTION STATEMENT A: This software has been approved for public 
//                           release, distribution is unlimited.
//
//=============================================================================






#include "DayTime.hpp"
#include "EngAlmanac.hpp"
#include "Geodetic.hpp"

namespace gpstk
{

   class IonoModel
   {
   public:
        
      NEW_EXCEPTION_CLASS(InvalidIonoModel, gpstk::Exception);
 

      enum Frequency
      {
         L1,  
         L2   
      };
      
      IonoModel() throw() : valid(false) {}
      
      virtual ~IonoModel() throw() {}
      
      IonoModel(const double a[4], const double b[4]) throw();
      
      IonoModel(const EngAlmanac& engalm) throw();
      
      void setModel(const double a[4], const double b[4]) throw();
      
      bool isValid() const throw() { return valid; }
      
      double getCorrection(const DayTime& time,
                           const Geodetic& rxgeo,
                           double svel,
                           double svaz,
                           Frequency freq = L1) const
         throw(InvalidIonoModel);

      bool operator==(const IonoModel& right) const throw();

      bool operator!=(const IonoModel& right) const throw();     

 private:

      double alpha[4];
      double beta[4];

      bool valid;
   };
}

#endif

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