TimeConstants.h

#ifndef HYDROBRICKS_TIME_CONSTANTS_H
#define HYDROBRICKS_TIME_CONSTANTS_H
 
namespace TimeConstants {
 
// Formal definition used in Hydrobricks
static constexpr double JD_TO_MJD_OFFSET = 2400000.5;
 
// Seconds per day
static constexpr double SECONDS_PER_DAY_D = 86400.0;
static constexpr long long SECONDS_PER_DAY_LL = 86400LL;
 
// MJD value of Unix epoch (1970-01-01 00:00:00 UTC) with the standard definition
// JD(1970-01-01 00:00:00) = 2440587.5; 2440587.5 - 2400000.5 = 40587.0
static constexpr double MJD_UNIX_EPOCH = 40587.0;
 
}  // namespace TimeConstants
 
using TimeConstants::JD_TO_MJD_OFFSET;
using TimeConstants::MJD_UNIX_EPOCH;
using TimeConstants::SECONDS_PER_DAY_D;
using TimeConstants::SECONDS_PER_DAY_LL;
 
#endif  // HYDROBRICKS_TIME_CONSTANTS_H