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Lukas Klass 2020-04-14 14:29:50 +02:00
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from esbo_etc.classes.optical_component.AOpticalComponent import AOpticalComponent
from esbo_etc.classes.ITransmissive import ITransmissive
from esbo_etc.classes.SpectralQty import SpectralQty
import astropy.units as u
class StrayLight(AOpticalComponent):
"""
A class to model additional stray light sources e.g. zodiacal light
"""
def __init__(self, parent: ITransmissive, emission: str = None) -> "Atmosphere":
"""
Initialize a new stray light source
Parameters
----------
parent : ITransmissive
The parent element from which the electromagnetic radiation is received.
This element is usually of type Target or StrayLight.
emission : str
Path to the file containing the spectral radiance of the stray light source.
The format of the file will be guessed by `astropy.io.ascii.read()`.
"""
# Read the emission
emission_sqty = SpectralQty.fromFile(emission, wl_unit_default=u.nm,
qty_unit_default=u.W / (u.m**2 * u.nm * u.sr))
# Create dummy transmittance
transmittance_sqty = SpectralQty(emission_sqty.wl, [1] * len(emission_sqty.wl) * u.dimensionless_unscaled)
# Initialize the super class
super().__init__(parent, transmittance_sqty, emission_sqty)