TimeConstants.hpp

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//==============================================================================
//
//  This file is part of GNSSTk, the ARL:UT GNSS Toolkit.
//
//  The GNSSTk 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 3.0 of the License, or
//  any later version.
//
//  The GNSSTk is distributed in the hope that it will be useful,
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//  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 GNSSTk; if not, write to the Free Software Foundation,
//  Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110, USA
//
//  This software was developed by Applied Research Laboratories at the
//  University of Texas at Austin.
//  Copyright 2004-2022, The Board of Regents of The University of Texas System
//
//==============================================================================
 
//==============================================================================
//
//  This software was 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.
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//==============================================================================
 
 
#ifndef GNSSTK_TIMECONSTANTS_HPP
#define GNSSTK_TIMECONSTANTS_HPP
 
namespace gnsstk
{
 
 
   const double MJD_TO_JD = 2400000.5;
   const long MJD_JDAY = 2400001L;
   const long UNIX_MJD = 40587L;
 
   const long HALFWEEK = 302400L;
   const long FULLWEEK = 604800L;
 
   const long SEC_PER_DAY = 86400L;
   const double DAY_PER_SEC = 1.0/SEC_PER_DAY;
 
   const long MS_PER_SEC = 1000L;
   const double SEC_PER_MS = 1.0/MS_PER_SEC;
 
   const long MS_PER_DAY = MS_PER_SEC * SEC_PER_DAY;
   const double DAY_PER_MS = 1.0/MS_PER_DAY;
 
   // system-specific constants
 
   // GPS -------------------------------------------
   const double GPS_EPOCH_JD = 2444244.5;
   const long GPS_EPOCH_MJD = 44244L;
   const long GPS_WEEK_PER_EPOCH = 1024L;
 
   const long ZCOUNT_PER_DAY = 57600L;
   const double DAY_PER_ZCOUNT = 1.0/ZCOUNT_PER_DAY;
   const long ZCOUNT_PER_WEEK = 403200L;
   const double WEEK_PER_ZCOUNT = 1.0/ZCOUNT_PER_WEEK;
   const long ZCOUNT_PER_MINUTE = 40;
   const long ZCOUNT_PER_HOUR = 2400;
 
   // GAL -------------------------------------------
   const double GAL_EPOCH_JD = 2451412.5;
   const long GAL_EPOCH_MJD = 51412L;
   const long GAL_WEEK_PER_EPOCH = 4096L;
 
   // QZS -------------------------------------------
   const double QZS_EPOCH_JD = 2444244.5;
   const long QZS_EPOCH_MJD = 44244L;
   const long QZS_WEEK_PER_EPOCH = 65535L;         // effectively no rollover
 
   // BDS -------------------------------------------
   const double BDS_EPOCH_JD = 2453736.5;
   const long BDS_EPOCH_MJD = 53736L;
   const long BDS_WEEK_PER_EPOCH = 8192L;
 
   // IRN -------------------------------------------
   const double IRN_EPOCH_JD = 2451412.5;
   const long IRN_EPOCH_MJD = 51412L;
   const long IRN_WEEK_PER_EPOCH = 1024L;
 
   // GLO -------------------------------------------
   const double GLO_EPOCH_JD = 2450082.5;
   const long GLO_EPOCH_MJD = 50083;
 
 
} // namespace
 
#endif // GNSSTK_TIMECONSTANTS_HPP