use scipy.constants
@@ -13,6 +13,7 @@ import json
import numpy as np
from numpy import pi, cos, sqrt, log10
+from scipy import constants
def load_json(filename):
@@ -30,7 +31,7 @@ def c():
"""
Returns the speed of light in meters per second
"""
- return 299792458.0
+ return constants.c
def itufs(spacing, startf=191.35, stopf=196.10):
@@ -53,7 +54,7 @@ def h():
"""
Returns plank's constant in J*s
"""
- return 6.62607004e-34
+ return constants.h
def lin2db(value):
@@ -64,11 +65,8 @@ def db2lin(value):
return 10**(value / 10)
-def wavelength2freq(value):
- """ Converts wavelength units to frequeuncy units.
- """
- return c() / value
-
+wavelength2freq = constants.lambda2nu
+freq2wavelength = constants.nu2lambda
def freq2wavelength(value):
""" Converts frequency units to wavelength units.
