irfpy.joee.fov0

The JoEE angle.

The channel numbering is defined, preliminary (as a version 0). Referring to the proposal v0.3, the JoEE has FoV of 360x12 with 22x12 per channel. From this, I defer the number of azimuthal channel 16. Only 1 elevational channel is defined, as \(\theta_\mathrm{JoEE}=0\). For 16 azimuthal channel, the number 0 starts from the nadir unit of ram looking one.

For frame definition, see also the separted document, JoEE, and the module irfpy.joee.frame0.

irfpy.joee.fov0.azim_pix_center(naz)

Return the azimuthal angle for the given channel numbers.

The 0 is ram direction with slightly nadir looking, meaning -11.25 deg. The channel 1 is neighborning with more nadir looking, i.e. -33.75 deg The equation looks like:

\[\phi = -11.25 - naz * 22.5 ~~~~(naz<8) \phi = 348.75 - naz * 22.5 ~~~~(naz>=8)\]

>>> print(azim_pix_center(0))
-11.25
>>> print(azim_pix_center(1))
-33.75
>>> print(azim_pix_center([6, 7, 8]))
[-146.25 -168.75  168.75]

Even float argument is allowed.

>>> print(azim_pix_center([15.5, 0.5]))
[  0.  -22.5]

irfpy.joee.fov0.azim_pix_fwhm(naz)

Return the FWHM.

Just return 22.0 degrees.

irfpy.joee.fov0.elev_pix_center(nel=0.0)

Elevation angle in degrees.

JoEv (possible) has only 1 channels, 0 is returned no matter how the nel is given.

irfpy.joee.fov0.elev_pix_fwhm(nel=0.0)

Return the FWHM

Just return 12.0 degrees.

irfpy.joee.fov0.doctests()