Coordinates of a celestial object in the horizon frame, in both rectangular and polar forms. More...

Data Fields
V3D_Vector	rectV
	unit vector in horizon coordinates

double	azimuth_rad
	azimuth (radian)

double	elevation_rad
	elevation (or altitude) (radian)

Detailed Description

Coordinates of a celestial object in the horizon frame, in both rectangular and polar forms.

The rectangular coordinate vector has the orientation
- x points to North horizon,
- y points to East horizon,
- z points to the zenith. (This is a left-handed set.)
In the polar form, the azimuth is measured clockwise from North (i.e. east = +90°).
This combined rectangular & polar form is used because it happens to be most convenient to calculate both forms at once.

Examples: demo1_sun.c, demo2_sun_tracking.c, demo3_moon.c, and demo4_multiple_sites.c.

Definition at line 129 of file sky.h.

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

Data Fields