Where are the star trackers pointing?¶

It is possible to use PandoraSpacecraft to see where the star trackers have pointed during prior Pandora observations.

In [1]:

import numpy as np
import matplotlib.pyplot as plt
import pandoraspacecraft as psc
from astropy.time import Time
import astropy.units as u

import numpy as np import matplotlib.pyplot as plt import pandoraspacecraft as psc from astropy.time import Time import astropy.units as u

In [2]:

ps = psc.PandoraSpacecraft()

ps = psc.PandoraSpacecraft()

In [3]:

t = Time(np.linspace(2461135, 2461136, 10000), format='jd')

t = Time(np.linspace(2461135, 2461136, 10000), format='jd')

In [4]:

st1_to_earth = ps.get_angle_to_body(t, direction='st1', body='earth')
st2_to_earth = ps.get_angle_to_body(t, direction='st2', body='earth')

st1_to_earth = ps.get_angle_to_body(t, direction='st1', body='earth') st2_to_earth = ps.get_angle_to_body(t, direction='st2', body='earth')

In [5]:

fig, ax = plt.subplots(facecolor='white', dpi=150)
ax.plot(t.jd, st1_to_earth.value, label='ST1', c='r')
ax.plot(t.jd, st2_to_earth.value, label='ST2', c='b')
ax.set(xlabel='Time [JD]', ylabel='Angle to Earth [deg]')
ax.legend();

fig, ax = plt.subplots(facecolor='white', dpi=150) ax.plot(t.jd, st1_to_earth.value, label='ST1', c='r') ax.plot(t.jd, st2_to_earth.value, label='ST2', c='b') ax.set(xlabel='Time [JD]', ylabel='Angle to Earth [deg]') ax.legend();

In [6]:

st1_to_sun = ps.get_angle_to_body(t, direction='st1', body='sun')
st2_to_sun = ps.get_angle_to_body(t, direction='st2', body='sun')

st1_to_sun = ps.get_angle_to_body(t, direction='st1', body='sun') st2_to_sun = ps.get_angle_to_body(t, direction='st2', body='sun')

In [7]:

fig, ax = plt.subplots(facecolor='white', dpi=150)
ax.plot(t.jd, st1_to_sun.value, label='ST1', c='r')
ax.plot(t.jd, st2_to_sun.value, label='ST2', c='b')
ax.set(xlabel='Time [JD]', ylabel='Angle to Sun [deg]')
ax.legend();

fig, ax = plt.subplots(facecolor='white', dpi=150) ax.plot(t.jd, st1_to_sun.value, label='ST1', c='r') ax.plot(t.jd, st2_to_sun.value, label='ST2', c='b') ax.set(xlabel='Time [JD]', ylabel='Angle to Sun [deg]') ax.legend();