IERSTable.h

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#ifndef CARMA_SERVICES_IERSTABLE_H
#define CARMA_SERVICES_IERSTABLE_H

#include <iostream>
#include <iomanip>
#include <sstream>
#include <string>
#include <vector>

namespace carma {
  namespace services {

    class IERSTable {
    public:

      IERSTable(const std::string& filename = "");
      
      virtual ~IERSTable();


      void open(const std::string& filename);

      void close(void);

      double dut1(const double mjd);

      double xpolar(const double mjd);

      double ypolar(const double mjd);

      double getMinMJD(void) { return min_mjd_; }


      double getMaxMJD(void) { return max_mjd_; }

      bool isOutOfDate();

      double age(void) ;
      
      void reload();

      static const double MAX_ALLOWABLE_DAYS_OUT_OF_DATE;

    private:
      ::std::string filename_;            // disk file name containing IERS data
      double last_mjd_;                   // last MJD entered
      int    last_idx_;                   // last index that belongs to MJD
      double min_mjd_;
      double max_mjd_;

      std::vector<double> mjd_;           // array of MJD's
      std::vector<double> dut1_;          //          dut1's
      std::vector<double> xpolar_;        //          xpolar's
      std::vector<double> ypolar_;        //          ypolar's            

      void setIndex(const double mjd);    // helper function to remember last access
      
    };
  }
}


#endif  // CARMA_SERVICES_IERSTABLE_H