ObsLocGC99.h

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/*
 * (C) Copyright 2020-2021 UCAR
 *
 * This software is licensed under the terms of the Apache Licence Version 2.0
 * which can be obtained at http://www.apache.org/licenses/LICENSE-2.0.
 */
 
#ifndef LORENZ95_OBSLOCGC99_H_
#define LORENZ95_OBSLOCGC99_H_
 
#include <ostream>
 
#include "eckit/config/Configuration.h"
#include "oops/base/ObsLocalizationBase.h"
 
#include "lorenz95/L95Traits.h"
 
// Forward declarations
namespace lorenz95 {
  class Iterator;
  class ObsTable;
  class ObsVec1D;
 
/// Observation space localization for Lorenz 95 model (Gaspari-Cohn)
class ObsLocGC99: public oops::ObsLocalizationBase<L95Traits, L95ObsTraits> {
 public:
  ObsLocGC99(const eckit::Configuration &, const ObsTable &);
 
  /// compute localization and save localization values in \p locfactor
  /// (missing value is for obs outside of localization)
  void computeLocalization(const Iterator &, ObsVec1D & locfactor) const override;
 
 private:
  void print(std::ostream &) const override;
 
  /// Gaspari-Cohn localization distance (localization goes to zero at rscale_)
  const double rscale_;
 
  /// ObsSpace associated with the observations
  const ObsTable & obsdb_;
};
// -----------------------------------------------------------------------------
}  // namespace lorenz95
 
#endif  // LORENZ95_OBSLOCGC99_H_