updated model-files and user-input-file

models/sun.py

@@ -1,10 +1,10 @@
-import astropy.units as u
+import astropy.units as unit
 import numpy as np
 from astropy.coordinates import EarthLocation, AltAz
 from astropy.coordinates import get_sun
 
 def sun_angles_astropy(lat, lon, h, utc):
-    loc = EarthLocation(lat=lat*u.deg, lon=lon*u.deg, height=h*u.m)
+    loc = EarthLocation(lat=lat*unit.deg, lon=lon*unit.deg, height=h*unit.m)
     ref = AltAz(obstime=utc, location=loc)
 
     sun_pos = get_sun(utc).transform_to(ref)