GCOSTools.cpp

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/***************************************************************************
 *                      GCOSTools.cpp - COSI tools                         *
 * ----------------------------------------------------------------------- *
 *  copyright (C) 2026 by Juergen Knoedlseder                              *
 * ----------------------------------------------------------------------- *
 *                                                                         *
 *  This program is free software: you can redistribute it and/or modify   *
 *  it under the terms of the GNU General Public License as published by   *
 *  the Free Software Foundation, either version 3 of the License, or      *
 *  (at your option) any later version.                                    *
 *                                                                         *
 *  This program 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 General Public License for more details.                           *
 *                                                                         *
 *  You should have received a copy of the GNU General Public License      *
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.  *
 *                                                                         *
 ***************************************************************************/
/**
 * @file GCOSTools.hpp
 * @brief Implementation of COSI tools
 * @author Juergen Knoedlseder
 */
 
/* __ Includes ___________________________________________________________ */
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include "GCOSTools.hpp"
 
/* __ Method name definitions ____________________________________________ */
 
/* __ Coding definitions _________________________________________________ */
 
/* __ Debug definitions __________________________________________________ */
 
 
/***********************************************************************//**
 * @brief Convert COSI seconds to GammaLib time
 *
 * @param[in] seconds COSI time in seconds
 * @return GammaLib time.
 *
 * The COSI time is specified in Unix time which is seconds from
 * 1970-01-01 00:00:00 UTC, ignoring leap seconds.
 ***************************************************************************/
GTime gammalib::cos_time(const double& seconds)
{
    // Set time reference for Unix seconds
    static const GTimeReference tref(40587.00048824074, "sec");
 
    // Convert COSI seconds to GammaLib time
    GTime time(seconds, tref);
 
    // Return time
    return time;
}
 
 
/***********************************************************************//**
 * @brief Convert GammaLib time to COSI seconds
 *
 * @param[in] time GammaLib time
 * @return COSI time in seconds.
 *
 * The COSI time is specified in Unix time which is seconds from
 * 1970-01-01 00:00:00 UTC, ignoring leap seconds.
 ***************************************************************************/
double gammalib::cos_seconds(const GTime& time)
{
    // Set time reference for Unix seconds
    static const GTimeReference tref(40587.00048824074, "sec");
 
    // Convert GammaLib time to COSI seconds
    double seconds = time.convert(tref);
 
    // Return COSI seconds
    return seconds;
}