Atmospheric Refraction

Functions
double LIBNOVA_EXPORT	ln_get_refraction_adj (double altitude, double atm_pres, double temp)
	Calculate the adjustment in altitude of a body due to atmospheric refraction. More...

Detailed Description

Functions relating to Atmospheric Refraction

All angles are expressed in degrees.

Function Documentation

double ln_get_refraction_adj	(	double	altitude,
		double	atm_pres,
		double	temp
	)

Calculate the adjustment in altitude of a body due to atmospheric refraction.

Parameters

altitude	The altitude of the object above the horizon in degrees
atm_pres	Atmospheric pressure in milibars
temp	Temperature in degrees C.

Returns

Adjustment in objects altitude in degrees.

Calculate the adjustment in altitude of a body due to atmosphric refraction. This value varies over altitude, pressure and temperature.

Note: Default values for pressure and teperature are 1010 mBar and 10C respectively.

References ln_deg_to_rad(), and ln_helio_posn::R.