vulcan::GMSTRotation Struct Reference

#include <EarthModel.hpp>

Inheritance diagram for vulcan::GMSTRotation:

Collaboration diagram for vulcan::GMSTRotation:

Public Member Functions
constexpr	GMSTRotation (double jd_epoch_=2451545.0)
double	gmst (double t_seconds) const override
Public Member Functions inherited from vulcan::EarthRotationModel
virtual	~EarthRotationModel ()=default
virtual double	ecef_to_eci_angle (double t_seconds) const

Public Attributes
double	jd_epoch
	Julian Date of the reference epoch.

Detailed Description

Earth rotation model using Greenwich Mean Sidereal Time formula

More accurate than constant omega for multi-day simulations. Uses the IAU 1982 GMST formula (accuracy ~0.1 arcsec).

GMST = 67310.54841 + (876600h + 8640184.812866)T + 0.093104T² - 6.2e-6T³ where T is Julian centuries from J2000.0

Constructor & Destructor Documentation

GMSTRotation()

vulcan::GMSTRotation::GMSTRotation ( double jd_epoch_ = 2451545.0 )

inlineexplicitconstexpr

Member Function Documentation

gmst()

double vulcan::GMSTRotation::gmst ( double t_seconds ) const

inlinenodiscardoverridevirtual

Greenwich Mean Sidereal Time (or equivalent rotation angle) at time t

Parameters

t_seconds

Seconds since reference epoch (typically J2000.0)

Returns

Rotation angle from ECEF to ECI [rad]

Implements vulcan::EarthRotationModel.

Member Data Documentation

jd_epoch

double vulcan::GMSTRotation::jd_epoch

Julian Date of the reference epoch.

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

• include/vulcan/coordinates/EarthModel.hpp