divtel package¶

divtel.pointing module¶

Functions to define telescopes pointings We use the same reference frame as simtel_array: X is pointing North Y is pointing West Z is pointing upward Az is taken clock-wise from X (towards Y) and between -180 and 180 degrees Alt is taken from ground (towards Z) and between -90 and 90 degrees

divtel.pointing.alt_az_to_vector(alt, az)¶

Compute a pointing vector coordinates (x,y,z) from an alt,az pointing direction

Parameters:

alt (float) – angle in rad
az (float) – angle in rad

Returns:

vector – [x, y, z]

Return type:

numpy.array

divtel.pointing.pointG_position(barycenter, div, alt_mean, az_mean)¶

Compute the position of g_point for the pointing

Parameters:

barycenter (np.array([x,y,z])) – position of the barycenter of the array
div (float)
alt_mean (astropy.Quantity) – mean pointing altitude in radians from which to diverge
az_mean (astropy.Quantity) – mean pointing azimuth in radians from which to diverge

Return type:

Numpy array [Gx, Gy, Gz]

divtel.pointing.tel_div_pointing(tel_position, g_point)¶

Divergent pointing to a point G. Update telescope pointing

Parameters:

tel_position (np.array([x, y, z])) – telescope coordinates
g_point (numpy.array([Gx, Gy, Gz]))

divtel.telescope module¶

class divtel.telescope.Array(telescope_list)¶

Bases: object

Describe a telescope array

Parameters:: telescope_list ([Telescope]) – list of telescopes forming the array

property barycenter¶

display_2d(projection='xy', ax=None, **kwargs)¶

Display the array

Parameters:

projection (str) – ‘xy’, ‘xz’ or ‘yz’
ax (matplotlib.pyplot.axes)
kwargs (args for pyplot.scatter)

Returns:

Return type:

matplotlib.pyplot.axes

display_3d()¶

divergent_pointing(div, alt_mean, az_mean)¶

Divergent pointing given a parameter div. Update pointing of all telescopes of the array

Parameters:

div (float between 0 and 1)
alt_mean (astropy.Quantity) – mean alt pointing
az_mean (astropy.Quantity) – mean az pointing

property pointing_altaz¶

All telescopes pointing directions (alt, az) as an array

Returns:: pointing_directions – 2D array: [[alt1,az1], [alt2, az2], …]
Return type:: astropy.Quantity

property pointing_vectors¶

all telescopes pointing vectors as an array

Returns:: pointing_vectors – 2D numpy array
Return type:: numpy.array

property positions_array¶

All telescopes positions

Returns:: positions_array – 2D numpy array
Return type:: numpy.array

class divtel.telescope.Telescope(x, y, z, focal, camera_radius)¶

Bases: object

Describe a generic telescope

Parameters:

x (astropy.quantity) – x ground position
y (astropy.quantity) – y ground position
z (astropy.quantity) – z ground position
focal (astropy.quantity)
camera_radius (astropy.quantity)

property fov¶: Area of the field of view in rad**2

point_to_altaz(alt, az)¶

point_to_object(object)¶

Point to object.

Parameters:: object (numpy.array([x, y, z]))

property pointing_vector¶

property position¶

property zenith¶

divtel.visualization module¶

divtel.visualization.display_array_pointing_in_sky(array)¶

divtel.visualization.polar_stuff(fig, telescope)¶

divtel.visualization.sky_fov(telescope, ax=None)¶

Display the telescope FoV in the sky

Parameters:

telescope (Telescope)
ax (matplotlib.pyplot.axes)

Returns:

Return type:

matplotlib.pyplot.axes