Ignoring off-limb pixels

How to not plot off-limb pixels.

By default sunkit-pyvista plots all pixels in a map, using assume_spherical_screen() to project off-limb pixels on to a spherical screen.

This example shows how off-limb pixels can be ignored altogether.

import astropy.units as u
from astropy.constants import R_sun
from astropy.coordinates import SkyCoord
from sunpy.coordinates import frames

from sunkit_pyvista import SunpyPlotter
from sunkit_pyvista.sample import LOW_RES_AIA_193

Files Downloaded:   0%|          | 0/1 [00:00<?, ?file/s]

AIA20110607_063307_0193_lowres.fits:   0%|          | 0.00/1.00M [00:00<?, ?B/s]


Files Downloaded: 100%|██████████| 1/1 [00:00<00:00,  5.74file/s]
Files Downloaded: 100%|██████████| 1/1 [00:00<00:00,  5.72file/s]

We will use an AIA 193 image from the sunpy sample data as the base image.

# Start by creating a plotter
plotter = SunpyPlotter()
# Plot a map setting the `assume_spherical_screen` to False
plotter.plot_map(
    LOW_RES_AIA_193,
    clip_interval=[1, 99] * u.percent,
    assume_spherical_screen=False,
)

# Set the camera coordinate to view the plot correctly
camera_coord = SkyCoord(
    0 * u.deg,
    0 * u.deg,
    6 * R_sun,
    frame=frames.HeliographicStonyhurst,
    obstime=LOW_RES_AIA_193.date,
)
plotter.set_camera_coordinate(camera_coord)

plotter.show()