irfpy.jna.frame0

Frame conversion between JUICE and JNA frame.

Spacecraft frame and JNA frame conversion is

x_SC = -x_JNA
y_SC = z_JNA
z_SC = y_JNA

See Frames for details.

irfpy.jna.frame0.jna2nsc(vec)

JNA to SC.

Parameters

vec – Vector in JNA frame. (3,) or (3, N) shaped numpy array.

>>> r_jna = np.array([1, 3, 5])
>>> r_nsc = jna2nsc(r_jna)
>>> print(r_nsc)
[-1  5  3]

Multiple vector conversion is supported. Shape should be (3, N), where N is the number of vectors. The returned is also (3, N) shape.

>>> rs_jna = np.array([[1, 2, 3, 4, 5], [6, 7, 8, 9, 10], [11, 12, 13, 14, 15]])
>>> print(rs_jna.shape)
(3, 5)
>>> rs_nsc = jna2nsc(rs_jna)
>>> print(rs_nsc.shape)
(3, 5)
>>> print(rs_nsc[:, 0])
[-1 11  6]

irfpy.jna.frame0.nsc2jna(vec)

SC frame vector, vec, is converted to JNA frame.

Parameters

vec – Vector in NSC frame. (3,) or (3, N) shaped numpy array.

>>> r_jna = np.array([-1, 2, 8])
>>> r_nsc = jna2nsc(r_jna)
>>> print(r_nsc)
[1 8 2]

irfpy.jna.frame0.jna2angles(vec)

Return the angles in degrees.

>>> jna2angles([1, 0, 0])
(0.0, 90.0)
>>> jna2angles([0, 1, 0])
(0.0, 0.0)
>>> jna2angles([0, 0, 1])
(-90.0, 0.0)
>>> jna2angles([0, 0, -1])
(90.0, 0.0)

irfpy.jna.frame0.angles2jna(theta, phi)

Angles (degrees) to a np.array.

>>> v = angles2jna(0, 90)
>>> print('%.3f %.3f %.3f' % (v[0], v[1], v[2]))
1.000 0.000 -0.000

>>> v = angles2jna(0, 0)
>>> print('%.3f %.3f %.3f' % (v[0], v[1], v[2]))
0.000 1.000 -0.000

>>> v = angles2jna(-90, 0)
>>> print('%.3f %.3f %.3f' % (v[0], v[1], v[2]))
0.000 0.000 1.000

>>> v = angles2jna(90, 0)
>>> print('%.3f %.3f %.3f' % (v[0], v[1], v[2]))
0.000 0.000 -1.000

irfpy.jna.frame0.doctests()