This class performs extinction computations, following literature from atmospheric optics and astronomy. More...

#include <RefractionExtinction.hpp>

Public Member Functions
void	forward (const Vec3d altAzPos, float mag, const int num=1) const
	Compute extinction effect for arrays of size. More...

void	forward (const Vec3f altAzPos, float mag, const int num=1) const

void	forward (const double sinAlt, float mag, const int num) const

void	forward (const float sinAlt, float mag, const int num) const

void	forward (const double sinAlt, float mag) const

void	forward (const float sinAlt, float mag) const

void	backward (const Vec3d altAzPos, float mag, const int num=1) const
	Compute inverse extinction effect for arrays of size. More...

void	backward (const Vec3f altAzPos, float mag, const int num=1) const

void	backward (const double sinAlt, float mag, const int num=1) const

void	backward (const float sinAlt, float mag, const int num=1) const

void	setExtinctionCoefficient (float k)
	Set visual extinction coefficient (mag/airmass), influences extinction computation. More...

float	getExtinctionCoefficient () const

Detailed Description

This class performs extinction computations, following literature from atmospheric optics and astronomy.

Airmass computations are limited to meaningful altitudes. The solution provided here will [hopefully!] result in a visible "zone of avoidance" near the horizon down to altitude -2, and may show stars in their full brightness below -2 degrees. Typical horizons do not go down below -1, so all natural sites should be covered. Note that forward/backward are no absolute reverse operations! All the computations should be in effect (1) only if atmosphere effects are true (2) only for terrestrial locations, not on Moon/Mars/Saturn etc config.ini:astro/flag_extinction_below_horizon=true|false controls if extinction kills objects below -2 degrees altitude by setting airmass to 42.

Definition at line 45 of file RefractionExtinction.hpp.

Member Function Documentation

void Extinction::backward	(	const Vec3d *	altAzPos,
		float *	mag,
		const int	num = `1`
	)		const

Compute inverse extinction effect for arrays of size.

Parameters

num	position vectors and magnitudes.
altAzPos	are the NORMALIZED (!!) (apparent) star position vectors, and their z components sin(apparent_altitude).
mag	the magnitudes Note that forward/backward are no absolute reverse operations!

void Extinction::forward	(	const Vec3d *	altAzPos,
		float *	mag,
		const int	num = `1`
	)		const

Compute extinction effect for arrays of size.

Parameters

num	position vectors and magnitudes.
altAzPos	are the NORMALIZED (!!) (apparent) star position vectors, and their z components sin(apparent_altitude).
mag	the magnitudes This call must therefore be done after application of Refraction, and only if atmospheric effects are on. Note that forward/backward are no absolute reverse operations!

void Extinction::setExtinctionCoefficient ( float k )

inline

Set visual extinction coefficient (mag/airmass), influences extinction computation.

Parameters

k=	0.1 for highest mountains, 0.2 for very good lowland locations, 0.35 for typical lowland, 0.5 in humid climates.

Definition at line 72 of file RefractionExtinction.hpp.

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

core/RefractionExtinction.hpp

Public Member Functions

Detailed Description

Member Function Documentation