text: //$Id: OpticalTrackingSystem.hpp 1398 2011-04-21 20:39:37Z  $
  //------------------------------------------------------------------------------
  //                             OpticalTrackingSystem
  //------------------------------------------------------------------------------
  // GMAT: General Mission Analysis Tool.
  //
  // Copyright (c) 2002 - 2018 United States Government as represented by the
  // Administrator of The National Aeronautics and Space Administration.
  // All Other Rights Reserved.
  //
  // Licensed under the Apache License, Version 2.0 (the "License"); 
  // You may not use this file except in compliance with the License. 
  // You may obtain a copy of the License at:
  // http://www.apache.org/licenses/LICENSE-2.0. 
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either 
  // express or implied.   See the License for the specific language
  // governing permissions and limitations under the License.
  //
  // Author: Darrel J. Conway
  // Created: Mar 23, 2010 by Darrel Conway (Thinking Systems)
  //
  // Developed jointly by NASA/GSFC and Thinking Systems, Inc. under the FDSS 
  // contract, Task 28
  //
  /**
   * Implementation for the OpticalTrackingSystem class
   */
  //------------------------------------------------------------------------------
  
  
  #ifndef OpticalTrackingSystem_hpp
  #define OpticalTrackingSystem_hpp
  
  /**
   * Base class for tracking systems that use optical (typically angle)
   * measurements that include light time iteration.
   */
  #include "estimation_defs.hpp"
  #include "TrackingSystem.hpp"
  
  class ESTIMATION_API OpticalTrackingSystem : public TrackingSystem
  {
  public:
     OpticalTrackingSystem(const std::string &name);
     virtual ~OpticalTrackingSystem();
     OpticalTrackingSystem(const OpticalTrackingSystem& usn);
     OpticalTrackingSystem& operator=(const OpticalTrackingSystem& usn);
  
     virtual GmatBase* Clone() const;
  };
  
  #endif /* OpticalTrackingSystem_hpp */
  