World Geodetic System 1984 (sarkit.wgs84)

Constants

WGS-84 Defining Parameters

Attribute	Quantity	Units
SEMI_MAJOR_AXIS	semi-major axis (equatorial radius of the Earth)	m
A	semi-major axis (equatorial radius of the Earth)	m
FLATTENING_FACTOR	flattening factor of the Earth (1/f)	(unitless)
NOMINAL_MEAN_ANGULAR_VELOCITY	nominal mean angular velocity of the earth	rad / s
GM	geocentric gravitational constant (mass of Earth’s atmosphere included)	m^3/s^2

WGS-84 Ellipsoid Derived Geometric Constants

Attribute	Quantity	Units
FLATTENING_REDUCED	flattening (reduced)	(unitless)
F	flattening (reduced)	(unitless)
SEMI_MINOR_AXIS	semi-minor axis (polar radius of the Earth)	m
B	semi-minor axis (polar radius of the Earth)	m
FIRST_ECCENTRICITY	first eccentricity	(unitless)
FIRST_ECCENTRICITY_SQUARED	first eccentricity squared	(unitless)
SECOND_ECCENTRICITY	second eccentricity	(unitless)
SECOND_ECCENTRICITY_SQUARED	second eccentricity squared	(unitless)

Global Coordinate Systems

cartesian_to_geodetic(xyz)	Converts WGS 84 cartesian coordinates to geodetic coordinates.
geodetic_to_cartesian(latlonhae)	Converts WGS 84 geodetic coordinates to cartesian coordinates.

Local Coordinate Systems

east(latlonhae)	Compute local east unit vectors from WGS 84 geodetic coordinates.
north(latlonhae)	Compute local north unit vectors from WGS 84 geodetic coordinates.
up(latlonhae)	Compute local up unit vectors from WGS 84 geodetic coordinates.