camera_to_altaz

lstchain.reco.utils.camera_to_altaz(pos_x, pos_y, focal, pointing_alt, pointing_az, obstime=None)

Compute camera to Horizontal frame (Altitude-Azimuth system). For MC assume the default ObsTime.

Parameters:

pos_x: `~astropy.units.Quantity`

X coordinate in camera (distance)

pos_y: `~astropy.units.Quantity`

Y coordinate in camera (distance)

focal: `~astropy.units.Quantity`

telescope focal (distance)

pointing_alt: `~astropy.units.Quantity`

pointing altitude in angle unit

pointing_az: `~astropy.units.Quantity`

pointing altitude in angle unit

obstime: `~astropy.time.Time`

Returns:

sky frame: astropy.coordinates.SkyCoord

in AltAz frame

Examples

>>> import astropy.units as u
>>> import numpy as np
>>> pos_x = np.array([0, 0]) * u.m
>>> pos_y = np.array([0, 0]) * u.m
>>> focal = 28 * u.m
>>> pointing_alt = np.array([1.0, 1.0]) * u.rad
>>> pointing_az = np.array([0.2, 0.5]) * u.rad
>>> sky_coords = utils.camera_to_altaz(pos_x, pos_y, focal, pointing_alt, pointing_az)