Constants
The constants submodule constains common mathematical, physical, astronomical constants.
SatelliteDynamics.AS2RAD — ConstantConstant to convert arcseconds to radians. Equal to 2pi/(360*3600). [rad/as]
SatelliteDynamics.RAD2AS — ConstantConstant to convert radians to arcseconds. Equal to 2pi/(360*3600) [as/ras]
SatelliteDynamics.C_LIGHT — ConstantSpeed of light in vacuum. [m/s]
D. Vallado, Fundamentals of Astrodynamics and Applications (4th Ed.), 2010
SatelliteDynamics.AU — ConstantAstronomical Unit. Equal to the mean distance of the Earth from the sun. TDB-compatible value. [m]
P. Gérard and B. Luzum, IERS Technical Note 36, 2010
SatelliteDynamics.MJD_ZERO — ConstantOffset of Modified Julian Days representation with respect to Julian Days. For a time, t, MJD_ZERO is equal to:
MJD_ZERO = t_jd - t_mjdWhere tjd is the epoch represented in Julian Days, and tmjd is the epoch in Modified Julian Days.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.MJD2000 — ConstantModified Julian Date of January 1, 2000 00:00:00. Value is independent of time scale.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GPS_TAI — ConstantOffset of GPS time system with respect to TAI time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.TAI_GPS — ConstantOffset of TAI time system with respect to GPS time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.TT_TAI — ConstantOffset of TT time system with respect to TAI time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.TAI_TT — ConstantOffset of TAI time system with respect to TT time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GPS_TT — ConstantOffset of GPS time system with respect to TT time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.TT_GPS — ConstantOffset of TT time system with respect to GPS time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GPS_ZERO — ConstantModified Julian Date of the start of the GPS time system in the GPS time system. This date was January 6, 1980 0H as reckond in the UTC time system.
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.R_EARTH — ConstantEarth's equatorial radius. [m]
GGM05s Gravity Model
SatelliteDynamics.WGS84_a — ConstantEarth's semi-major axis as defined by the WGS84 geodetic system. [m]
NIMA Technical Report TR8350.2
SatelliteDynamics.WGS84_f — ConstantEarth's ellipsoidal flattening. WGS84 Value.
NIMA Technical Report TR8350.2
SatelliteDynamics.GM_EARTH — ConstantEarth's Gravitational constant [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.e_EARTH — ConstantEarth's first eccentricity. WGS84 Value. [dimensionless]
NIMA Technical Report TR8350.2
SatelliteDynamics.J2_EARTH — ConstantEarth's first zonal harmonic. [dimensionless]
GGM05s Gravity Model.
SatelliteDynamics.OMEGA_EARTH — ConstantEarth axial rotation rate. [rad/s]
D. Vallado, Fundamentals of Astrodynamics and Applications (4th Ed.), p. 222, 2010
SatelliteDynamics.GM_SUN — ConstantGravitational constant of the Sun. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.R_SUN — ConstantNominal solar photospheric radius. [m]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.P_SUN — ConstantNominal solar radiation pressure at 1 AU. [N/m^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_MOON — ConstantGravitational constant of the Moon. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_MERCURY — ConstantGravitational constant of the Mercury. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_VENUS — ConstantGravitational constant of the Venus. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_MARS — ConstantGravitational constant of the Mars. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_JUPITER — ConstantGravitational constant of the Jupiter. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_SATURN — ConstantGravitational constant of the Saturn. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_URANUS — ConstantGravitational constant of the Uranus. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_NEPTUNE — ConstantGravitational constant of the Neptune. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.
SatelliteDynamics.GM_PLUTO — ConstantGravitational constant of the Pluto. [m^3/s^2]
O. Montenbruck, and E. Gill, Satellite Orbits: Models, Methods and Applications, 2012.