Added TPH dependency to Edlen and BonschPotulski functions.

scripts/compare_refractivity_models.py

@@ -81,7 +81,26 @@ class atmosphericModel:
 	def slalib(self, l=None):
 		if not l:
 			l = self.lrange
-		return(AstroAtmosphere.slalib(l, T=self.T, p=self.P, RH=self.H)-1)
+		try:
+			from pyslalib import slalib
+			return(AstroAtmosphere.slalib(l, T=self.T, p=self.P, RH=self.H)-1)
+		except ImportError as e:
+			print('Could not import pyslalib.slalib. Using slower Python native function sla_refro().')
+			h=0
+			lat=-24
+			tlr=0.0065
+			eps=1e-10
+			zObs = np.deg2rad(45.07182)
+			p = self.P/100
+			R = []
+			if type(l) == float:
+				l = [l]
+			for wl in l:
+				R.append(AstroAtmosphere.sla_refro(zObs, h, self.T, p, self.H, wl, lat, tlr, eps))
+			if len(l) == 1:
+				return R[0]
+			else:
+				return np.asarray(R)
 
 
 if __name__ == '__main__':