diff --git a/maria/models.py b/maria/models.py
index e221c38..8db1aa7 100644
--- a/maria/models.py
+++ b/maria/models.py
@@ -85,6 +85,7 @@ def __init__(self, array, pointing, site):
             region=self.site.region,
             seasonal=self.site.seasonal,
             diurnal=self.site.diurnal,
+            altitude=self.site.altitude
         )
 
 
@@ -165,7 +166,7 @@ def __init__(self, array, pointing, site, config=DEFAULT_LAM_CONFIG, verbose=Fal
                 self,
                 attr,
                 sp.interpolate.RegularGridInterpolator(
-                    (self.weather.height, self.weather.time),
+                    (self.weather.levels, self.weather.time),
                     getattr(self.weather, attr),
                 )((self.heights, self.pointing.unix[None])),
             )
diff --git a/setup.py b/setup.py
index 27d84cd..74051f5 100644
--- a/setup.py
+++ b/setup.py
@@ -12,8 +12,8 @@
 
 setuptools.setup(
     name="maria",
-    version="0.0.12",
-    description="Simulates atmospheric emission for ground-based telescopes",
+    version="0.2.0",
+    description="Simulate observations of ground-based millimeter and submillimeter telescopes.",
     long_description=readme,
     author="Thomas W. Morris",
     author_email="thomasmorris@princeton.edu",