Refactored some variable names and updated descriptions

AstroAtmosphere/examples.py

@@ -68,7 +68,7 @@ def quick_refractive_index(l, conditions='STANDARD', T=288.15, p=101325,
 	return n
 
 
-def quick_refraction(l, z, conditions='STANDARD', T=288.15, p=101325, 
+def quick_refraction(l, zenith, conditions='STANDARD', T=288.15, p=101325, 
 							H=0.0, xc=450, lat=0, h=0):
 	'''
 		Function to quickly calculate the refraction
@@ -79,8 +79,9 @@ def quick_refraction(l, z, conditions='STANDARD', T=288.15, p=101325,
 		----------
 		l  	: 	float 
 			Wavelength in microns
-		z  	: 	float 
-			Zenith angle of the observation
+		zenith : float
+				Angle of observation in degrees.
+				zenith = 0 means the observation is directly overhead.
 		conditions 	: string
 			'STANDARD' or 'CERRO_ARMAZONES', refers
 			to the standard atmospheric conditions.
@@ -132,10 +133,10 @@ def quick_refraction(l, z, conditions='STANDARD', T=288.15, p=101325,
 	# Initializing refraction model and setting the reduced height
 	ref = refraction(lat, h)
 	ref.setReducedHeight(p, rho)
-	return ref.cassini(n, z)
+	return ref.cassini(n, zenith)
 
 
-def quick_dispersion(l1, l2, z, conditions='STANDARD', T=288.15, 
+def quick_dispersion(l1, l2, zenith, conditions='STANDARD', T=288.15, 
 						p=101325, H=0.0, xc=450, lat=0, h=0):
 	'''
 		Function to quickly calculate the dispersion
@@ -148,8 +149,9 @@ def quick_dispersion(l1, l2, z, conditions='STANDARD', T=288.15,
 			Shortest wavelength of interest in micron.
 		l2 	: 	float
 			Longest wavelength of interest in micron.
-		z 	: 	float
-			Zenith angle of the observation
+		zenith : float
+				Angle of observation in degrees.
+				zenith = 0 means the observation is directly overhead.
 		conditions 	: string
 			'STANDARD' or 'CERRO_ARMAZONES', refers
 			to the standard atmospheric conditions.
@@ -202,4 +204,4 @@ def quick_dispersion(l1, l2, z, conditions='STANDARD', T=288.15,
 	# Initializing refraction model and setting the reduced height
 	disp = dispersion(lat, h)
 	disp.setReducedHeight(p, rho)
-	return disp.cassini(n1, n2, z)
+	return disp.cassini(n1, n2, zenith)