diff --git a/.DS_Store b/.DS_Store
index 1711263..e03b78d 100644
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diff --git a/pyatmos/.DS_Store b/pyatmos/.DS_Store
index 4c1d3a5..102822b 100644
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diff --git a/pyatmos/standardatmos/__init__.py b/pyatmos/standardatmos/__init__.py
index 708338d..b049ec3 100644
--- a/pyatmos/standardatmos/__init__.py
+++ b/pyatmos/standardatmos/__init__.py
@@ -1,5 +1,5 @@
 '''
-U.S. Standard Atmosphere (Range: -0.611 to 1,000 km), 1976
+Standard Atmosphere Model
 
 This subpackage defines the following functions:
 
@@ -7,8 +7,9 @@ expo.py
     expo - Estimate the air densities at given geometric or geopotential altitudes 
            above the sea level using a exponential atmosphere model.
 ussa76.py
+    lapse_tp - Calculate the temperature and pressure at a given geopotential altitude above base of a specific layer.
+    ussa76 - Implements the U.S. Standard Atmosphere 1976(USSA76) up to 86km. 
 
-isa - Implements the International Standard Atmosphere(ISA) Model up to 86km. 
-
-lapse_tp - Calculate the temperature and pressure at a given geopotential altitude above base of a specific layer.
+coesa76.py 
+    coesa76 - Implements the U.S. Committee on Extension to the Standard Atmosphere(COESA 1976) up to 1000km. 
 '''              
\ No newline at end of file