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1// Boost.Units - A C++ library for zero-overhead dimensional analysis and
2// unit/quantity manipulation and conversion
3//
4// Copyright (C) 2003-2008 Matthias Christian Schabel
5// Copyright (C) 2008 Steven Watanabe
6//
7// Distributed under the Boost Software License, Version 1.0. (See
8// accompanying file LICENSE_1_0.txt or copy at
9// http://www.boost.org/LICENSE_1_0.txt)
10
11#ifndef BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP
12#define BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP
13
14#include <boost/units/quantity.hpp>
15#include <boost/units/static_constant.hpp>
16
17#include <boost/units/systems/detail/constants.hpp>
18#include <boost/units/systems/si/capacitance.hpp>
19#include <boost/units/systems/si/current.hpp>
20#include <boost/units/systems/si/energy.hpp>
21#include <boost/units/systems/si/force.hpp>
22#include <boost/units/systems/si/length.hpp>
23#include <boost/units/systems/si/mass.hpp>
24#include <boost/units/systems/si/resistance.hpp>
25#include <boost/units/systems/si/temperature.hpp>
26#include <boost/units/systems/si/time.hpp>
27#include <boost/units/systems/si/velocity.hpp>
28#include <boost/units/systems/si/volume.hpp>
29#include <boost/units/systems/si/codata/typedefs.hpp>
30
31/// \file
32/// CODATA recommended values of fundamental universal constants
33/// using CODATA 2006 values as of 2007/03/30
34
35namespace boost {
36
37namespace units {
38
39namespace si {
40
41namespace constants {
42
43namespace codata {
44
45/// CODATA recommended values of the fundamental physical constants: NIST SP 961
46
47// UNIVERSAL
48/// speed of light
49BOOST_UNITS_PHYSICAL_CONSTANT(c,quantity<velocity>,299792458.0*meters/second,0.0*meters/second);
50/// magnetic constant (exactly 4 pi x 10^(-7) - error is due to finite precision of pi)
51BOOST_UNITS_PHYSICAL_CONSTANT(mu_0,quantity<force_over_current_squared>,12.56637061435917295385057353311801153679e-7*newtons/ampere/ampere,0.0*newtons/ampere/ampere);
52/// electric constant
53BOOST_UNITS_PHYSICAL_CONSTANT(epsilon_0,quantity<capacitance_over_length>,8.854187817620389850536563031710750260608e-12*farad/meter,0.0*farad/meter);
54/// characteristic impedance of vacuum
55BOOST_UNITS_PHYSICAL_CONSTANT(Z_0,quantity<resistance>,376.7303134617706554681984004203193082686*ohm,0.0*ohm);
56/// Newtonian constant of gravitation
57BOOST_UNITS_PHYSICAL_CONSTANT(G,quantity<volume_over_mass_time_squared>,6.67428e-11*cubic_meters/kilogram/second/second,6.7e-15*cubic_meters/kilogram/second/second);
58/// Planck constant
59BOOST_UNITS_PHYSICAL_CONSTANT(h,quantity<energy_time>,6.62606896e-34*joule*seconds,3.3e-41*joule*seconds);
60/// Dirac constant
61BOOST_UNITS_PHYSICAL_CONSTANT(hbar,quantity<energy_time>,1.054571628e-34*joule*seconds,5.3e-42*joule*seconds);
62/// Planck mass
63BOOST_UNITS_PHYSICAL_CONSTANT(m_P,quantity<mass>,2.17644e-8*kilograms,1.1e-12*kilograms);
64/// Planck temperature
65BOOST_UNITS_PHYSICAL_CONSTANT(T_P,quantity<temperature>,1.416785e32*kelvin,7.1e27*kelvin);
66/// Planck length
67BOOST_UNITS_PHYSICAL_CONSTANT(l_P,quantity<length>,1.616252e-35*meters,8.1e-40*meters);
68/// Planck time
69BOOST_UNITS_PHYSICAL_CONSTANT(t_P,quantity<time>,5.39124e-44*seconds,2.7e-48*seconds);
70
71} // namespace codata
72
73} // namespace constants
74
75} // namespace si
76
77} // namespace units
78
79} // namespace boost
80
81#endif // BOOST_UNITS_CODATA_UNIVERSAL_CONSTANTS_HPP