CENA’s FOV

CENA has 7 channels of fields of view (FoV). The FoV is fixed in terms of the spacecraft.

CENA FoV in CENA frame

To be written

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CENA FoV in Spacecraft frame

To be writtern.

Todo

Write the section

CENA FoV crossing to the lunar surface

CENA FoV crossing at the surface of the Moon in ME frame can be conducted using irfpy.cena.intersection module.

Use func:irfpy.cena.intersection.get_center_me which provides the intersection between the center of the given channel and the lunar surface at a given time.

First specify the time.

>>> import datetime
>>> t = datetime.datetime(2009, 1, 31, 3, 25, 17)

Then call the function func:irfpy.cena.intersection.get_center_me to get the crosssection of the center position of the channel.

>>> from irfpy.cena.intersection import get_center_me
>>> lon, lat = get_center_me(t, 3)

Here ``3’’ is the channel number 3, i.e. the boresight direction.

>>> print(lon)
72.5
>>> print(lat)
62.5