NASA JunoCam

Example of JunoCam field of view projection during the 2021 Ganymede flyby.

In June 2021, the Juno spacecraft made a flyby of Ganymede an recorded a series of images of the surface.

import matplotlib.pyplot as plt

from planetary_coverage import GANYMEDE, TourConfig
from planetary_coverage.misc import wget

Manually download the required kernels

remote = 'https://naif.jpl.nasa.gov/pub/naif/JUNO/kernels'

kernels = (
    'lsk/naif0012.tls',
    'pck/pck00010.tpc',
    'fk/juno_v12.tf',
    'ik/juno_junocam_v03.ti',
    'sclk/JNO_SCLKSCET.00114.tsc',
    'spk/de440s.bsp',
    'spk/juno_pred_orbit.bsp',
    'spk/juno_rec_orbit.bsp',
    'spk/juno_struct_v04.bsp',
    'spk/jup363.bsp',
    'spk/spk_pre_210416_210902_210608_btm34_p.bsp',
    'ck/juno_sc_rec_210607_210608_v01.bc',
)

for kernel in kernels:
    wget(f'{remote}/{kernel}', f'data/JUNO/kernels/{kernel}', skip=True)

Load Juno trajectory

juno = TourConfig(
    kernels=[f'data/JUNO/kernels/{kernel}' for kernel in kernels],
    spacecraft='JUNO',
    target='Ganymede',
)

junocam = juno['2021-06-07T16:57:22.8']  # Frame 6 of image 10,629

junocam

<SpacecraftTrajectory> Observer: JUNO | Target: GANYMEDE
 - UTC start time: 2021-06-07T16:57:22.800
 - UTC stop time: 2021-06-07T16:57:22.800
 - Nb of pts: 1

Project the JunoCam FOVs

fig = plt.figure(figsize=(12, 8))

ax = fig.add_subplot(projection=GANYMEDE)

ax.add_collection(junocam['JUNOCAM_RED'].fovs(edgecolor='tab:red', lw=3))
ax.add_collection(junocam['JUNOCAM_GREEN'].fovs(edgecolor='tab:green', lw=3))
ax.add_collection(junocam['JUNOCAM_BLUE'].fovs(edgecolor='tab:blue', lw=3))

ax.set_xticks(range(300, 361, 5))
ax.set_yticks(range(-10, 31, 5))

ax.set_xlim(300, 360)
ax.set_ylim(-10, 31)

ax.set_title('JunoCam RGB footprints (frame 6 of image 10,629)')

plt.show()

Comparison with the original image

Download

• 07-juno.ipynb

• 07-juno.py