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Added Filippenko model, updated B&S refractivity
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@@ -3,12 +3,93 @@ from .ciddorModel import Observatory
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from .refractionModels import refraction
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from .dispersionModels import dispersion
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from .neoslalib import sla_refro
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from .observatories import observatories
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from .refractivityModels import Edlen1953
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import numpy as np
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'''
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@ Author: Joost van den Born
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@ Contact: born@astron.nl
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@ Description: Some functions for quick testing.
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'''
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def get_conditions(location):
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'''
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Returns the mean conditions at various site. Currently
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supported locations:
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- 'STANDARD'
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- 'CERRO_ARMAZONES'
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- 'CERRO_PARANAL'
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- 'LA_PALMA'
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- 'LA_SILLA'
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- 'LAS_CAMPANAS'
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- 'MAUNA_KEA'
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Parameters
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----------
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location : string
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String denoting the desired location
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Returns
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-------
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observatory : dict
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Dictionary containing the atmospheric parameters
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'''
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observatory = observatories[location]
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return observatory
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def Filippenko1982(l1, l2, zenith, conditions='STANDARD', T=288.15, p=101325,
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RH=0.0, xc=450, lat=0, h=0, f=None):
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'''
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Calculates the refraction following the 1982 paper by
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Alexei V. Filippenko.
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The refraction is based on a flat atmosphere and the refractivity
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values are calculated from a modified Edlen (1953) equation.
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Parameters
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----------
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l1 : float
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Shortest wavelength of interest in micron.
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l2 : float
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Longest wavelength of interest in micron.
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zenith : float
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Angle of observation in degrees.
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zenith = 0 means the observation is directly overhead.
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conditions : string
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Refers to the standard conditions of the
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observatory. See get_conditions() for more info.
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If set to 'None', the conditions specified
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after will be used.
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T : float (optional)
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Temperature in Kelvin
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p : float (optional)
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Atmospheric pressure in Pa
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RH : float (optional)
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Relative humidity
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xc : float (optional)
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CO2 density in parts per million
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lat : float (optional)
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Latitude of the observer in degrees
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h : float (optional)
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Altitude of the observer in meters
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f : float
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Water vapour pressure (default=None). If None, it is
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calculated automatically.
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Returns
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-------
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R : float
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Atmospheric refraction in degrees
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'''
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if conditions is not None:
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T, p, RH, xc, lat, h, _ = get_conditions(conditions).values()
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n1 = Edlen1953(l1, T=T, p=p, RH=RH, f=f)
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n2 = Edlen1953(l2, T=T, p=p, RH=RH, f=f)
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dR = (n1 - n2) * np.tan(np.deg2rad(zenith))
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return np.degrees(dR)
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def quick_refractive_index(l, conditions='STANDARD', T=288.15, p=101325,
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@@ -23,8 +104,10 @@ def quick_refractive_index(l, conditions='STANDARD', T=288.15, p=101325,
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l : float
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Wavelength in microns
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conditions: string
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'STANDARD' or 'CERRO_ARMAZONES', refers
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to the standard atmospheric conditions.
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Refers to the standard conditions of the
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observatory. See get_conditions() for more info.
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If set to 'None', the conditions specified
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after will be used.
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T : float (optional)
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Temperature in Kelvin
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p : float (optional)
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@@ -43,23 +126,8 @@ def quick_refractive_index(l, conditions='STANDARD', T=288.15, p=101325,
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n : float
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Refractive index for the given conditions.
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'''
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if conditions == 'STANDARD':
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# Parameters at Cerro Armazones
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T = 288.15 # k
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p = 101325 # Pa
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RH = 0.0
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xc = 450 # ppm
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lat = 0 # degrees
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h = 0 # m
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elif conditions == 'CERRO_ARMAZONES':
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# Parameters at Cerro Armazones
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T = 279.65 # k
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p = 71200 # Pa
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RH = 0.22
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xc = 450 # ppm
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lat = -24.5983 # degrees
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h = 3064 # m
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if conditions is not None:
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T, p, RH, xc, lat, h, _ = get_conditions(conditions).values()
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# Initializing dispersion model
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at = Observatory()
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@@ -84,8 +152,10 @@ def quick_refraction(l, zenith, conditions='STANDARD', T=288.15, p=101325,
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Angle of observation in degrees.
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zenith = 0 means the observation is directly overhead.
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conditions : string
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'STANDARD' or 'CERRO_ARMAZONES', refers
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to the standard atmospheric conditions.
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Refers to the standard conditions of the
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observatory. See get_conditions() for more info.
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If set to 'None', the conditions specified
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after will be used.
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T : float (optional)
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Temperature in Kelvin
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p : float (optional)
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@@ -104,23 +174,8 @@ def quick_refraction(l, zenith, conditions='STANDARD', T=288.15, p=101325,
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R : float
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Refraction in degrees
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'''
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if conditions == 'STANDARD':
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# Parameters at Cerro Armazones
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T = 288.15 # k
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p = 101325 # Pa
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RH = 0.0
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xc = 450 # ppm
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lat = 0 # degrees
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h = 0 # m
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elif conditions == 'CERRO_ARMAZONES':
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# Parameters at Cerro Armazones
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T = 279.65 # k
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p = 71200 # Pa
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RH = 0.22
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xc = 450 # ppm
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lat = -24.5983 # degrees
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h = 3064 # m
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if conditions is not None:
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T, p, RH, xc, lat, h, _ = get_conditions(conditions).values()
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# Initializing dispersion model
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at = Observatory()
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@@ -154,8 +209,10 @@ def quick_dispersion(l1, l2, zenith, conditions='STANDARD', T=288.15,
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Angle of observation in degrees.
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zenith = 0 means the observation is directly overhead.
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conditions : string
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'STANDARD' or 'CERRO_ARMAZONES', refers
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to the standard atmospheric conditions.
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Refers to the standard conditions of the
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observatory. See get_conditions() for more info.
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If set to 'None', the conditions specified
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after will be used.
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T : float (optional)
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Temperature in Kelvin
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p : float (optional)
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@@ -174,23 +231,8 @@ def quick_dispersion(l1, l2, zenith, conditions='STANDARD', T=288.15,
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dR : float
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Atmospheric dispersion in degrees
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'''
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if conditions == 'STANDARD':
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# Parameters at Cerro Armazones
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T = 288.15 # k
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p = 101325 # Pa
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RH = 0.0
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xc = 450 # ppm
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lat = 0 # degrees
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h = 0 # m
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elif conditions == 'CERRO_ARMAZONES':
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# Parameters at Cerro Armazones
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T = 279.65 # k
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p = 71200 # Pa
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RH = 0.22
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xc = 450 # ppm
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lat = -24.5983 # degrees
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h = 3064 # m
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if conditions is not None:
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T, p, RH, xc, lat, h, _ = get_conditions(conditions).values()
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# Initializing dispersion model
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at = Observatory()
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@@ -228,8 +270,10 @@ def slalib_refraction(l, zenith, conditions='STANDARD', T=288.15, p=101325,
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Angle of observation in degrees.
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zenith = 0 means the observation is directly overhead.
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conditions : string
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'STANDARD' or 'CERRO_ARMAZONES', refers
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to the standard atmospheric conditions.
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Refers to the standard conditions of the
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observatory. See get_conditions() for more info.
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If set to 'None', the conditions specified
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after will be used.
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T : float (optional)
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Temperature in Kelvin
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p : float (optional)
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@@ -245,11 +289,11 @@ def slalib_refraction(l, zenith, conditions='STANDARD', T=288.15, p=101325,
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tlr : float
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Temperature lapse rate (default=0.0065)
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eps : float
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Precision at which the calculation is aborted (default=1e-10)
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Precision at which the calculation is aborted (default=1e-8)
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use_pyslalib : bool
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Flag that indicates that the user wants to use the pySlalib
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package. If False, the internal python port of the original
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FORTRAN code will be used. (Default=False).
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FORTRAN code will be used. (default=False).
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Returns
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-------
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@@ -257,23 +301,8 @@ def slalib_refraction(l, zenith, conditions='STANDARD', T=288.15, p=101325,
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Refraction in degrees
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'''
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if conditions == 'STANDARD':
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# Parameters at Cerro Armazones
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T = 288.15 # k
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p = 101325 # Pa
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RH = 0.0
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xc = 450 # ppm
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lat = 0 # degrees
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h = 0 # m
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elif conditions == 'CERRO_ARMAZONES':
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# Parameters at Cerro Armazones
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T = 279.65 # k
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p = 71200 # Pa
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RH = 0.22
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xc = 450 # ppm
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lat = -24.5983 # degrees
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h = 3064 # m
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if conditions is not None:
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T, p, RH, xc, lat, h, _ = get_conditions(conditions).values()
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# Converting units to the units that sla_refro() requires.
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_zenith = np.deg2rad(zenith) # From degrees to radians
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@@ -326,8 +355,10 @@ def slalib_dispersion(l1, l2, zenith, conditions='STANDARD', T=288.15, p=101325,
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Angle of observation in degrees.
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zenith = 0 means the observation is directly overhead.
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conditions : string
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'STANDARD' or 'CERRO_ARMAZONES', refers
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to the standard atmospheric conditions.
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Refers to the standard conditions of the
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observatory. See get_conditions() for more info.
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If set to 'None', the conditions specified
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after will be used.
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T : float (optional)
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Temperature in Kelvin
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p : float (optional)
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@@ -343,11 +374,11 @@ def slalib_dispersion(l1, l2, zenith, conditions='STANDARD', T=288.15, p=101325,
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tlr : float
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Temperature lapse rate (default=0.0065)
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eps : float
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Precision at which the calculation is aborted (default=1e-10)
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Precision at which the calculation is aborted (default=1e-8)
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use_pyslalib : bool
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Flag that indicates that the user wants to use the pySlalib
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package. If False, the internal python port of the original
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FORTRAN code will be used. (Default=False).
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FORTRAN code will be used. (default=False).
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Returns
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-------
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