vulcan::EarthModel Struct Reference

#include <EarthModel.hpp>

Public Member Functions
constexpr	EarthModel (double a_, double f_, double omega_, double mu_)
	Construct an EarthModel with derived quantities computed.

Static Public Member Functions
static constexpr EarthModel	WGS84 ()
	WGS84 reference ellipsoid (most common for GPS/navigation).
static constexpr EarthModel	Spherical ()
	Spherical Earth (for simplified calculations).

Public Attributes
double	a
	Semi-major axis (equatorial radius) [m].
double	f
	Flattening (a-b)/a.
double	omega
	Angular velocity [rad/s].
double	mu
	Gravitational parameter (GM) [m³/s²].
double	b
	Semi-minor axis (polar radius) [m].
double	e2
	First eccentricity squared: e² = 2f - f²
double	e_prime2
	Second eccentricity squared: e'² = e²/(1-e²).

Detailed Description

Ellipsoid parameters for Earth models

Stores the defining parameters of a reference ellipsoid along with derived quantities computed at construction time. This struct is not templated as ellipsoid constants are always numeric (double).

Example:

auto model = EarthModel::WGS84();
double equatorial_radius = model.a;  // 6378137.0 m

Constructor & Destructor Documentation

EarthModel()

vulcan::EarthModel::EarthModel ( double a_, double f_, double omega_, double mu_ )

inlineconstexpr

Construct an EarthModel with derived quantities computed.

Member Function Documentation

Spherical()

constexpr EarthModel vulcan::EarthModel::Spherical ( )

inlinestaticconstexpr

Spherical Earth (for simplified calculations).

WGS84()

constexpr EarthModel vulcan::EarthModel::WGS84 ( )

inlinestaticconstexpr

WGS84 reference ellipsoid (most common for GPS/navigation).

Member Data Documentation

a

double vulcan::EarthModel::a

Semi-major axis (equatorial radius) [m].

b

double vulcan::EarthModel::b

Semi-minor axis (polar radius) [m].

e2

double vulcan::EarthModel::e2

First eccentricity squared: e² = 2f - f²

e_prime2

double vulcan::EarthModel::e_prime2

Second eccentricity squared: e'² = e²/(1-e²).

f

double vulcan::EarthModel::f

Flattening (a-b)/a.

mu

double vulcan::EarthModel::mu

Gravitational parameter (GM) [m³/s²].

omega

double vulcan::EarthModel::omega

Angular velocity [rad/s].

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The documentation for this struct was generated from the following file:

• include/vulcan/coordinates/EarthModel.hpp