diff --git a/pyatmos/jb2008/__init__.py b/pyatmos/jb2008/__init__.py
index 4d2550e..f8149df 100644
--- a/pyatmos/jb2008/__init__.py
+++ b/pyatmos/jb2008/__init__.py
@@ -1,16 +1 @@
-'''
-pyatmos jb2008 subpackage
-
-This subpackage defines the following functions:
-
-JB2008_subfunc.py  - subfunctions that implement the atmospheric model JB2008
-
-jb2008.py  - Input interface of JB2008
-
-spaceweather.py
-
-    download_sw_jb2008 - Download or update the space weather file for JB2008 from https://sol.spacenvironment.net/JB2008/indices/
-
-    read_sw_jb2008 - Read the space weather file for JB2008
-
-'''              
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diff --git a/pyatmos/msise/__init__.py b/pyatmos/msise/__init__.py
index 793b7b5..f8149df 100644
--- a/pyatmos/msise/__init__.py
+++ b/pyatmos/msise/__init__.py
@@ -1,16 +1 @@
-'''
-pyatmos msise subpackage
-
-This subpackage defines the following functions:
-
-nrlmsise00_subfunc.py  - subfunctions that implement the atmospheric model NRLMSISE-00
-
-nrlmsise00.py  - Input interface of NRLMSISE-00
-
-spaceweather.py
-
-    download_sw_nrlmsise00 - Download or update the space weather file for NRLMSISE-00 from www.celestrak.com
-
-    read_sw_nrlmsise00 - Read the space weather file for NRLMSISE-00
-
-'''              
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diff --git a/pyatmos/standardatmos/__init__.py b/pyatmos/standardatmos/__init__.py
index b049ec3..f8149df 100644
--- a/pyatmos/standardatmos/__init__.py
+++ b/pyatmos/standardatmos/__init__.py
@@ -1,15 +1 @@
-'''
-Standard Atmosphere Model
-
-This subpackage defines the following functions:
-
-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. 
-
-coesa76.py 
-    coesa76 - Implements the U.S. Committee on Extension to the Standard Atmosphere(COESA 1976) up to 1000km. 
-'''              
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diff --git a/pyatmos/utils/__init__.py b/pyatmos/utils/__init__.py
index a60958d..f8149df 100644
--- a/pyatmos/utils/__init__.py
+++ b/pyatmos/utils/__init__.py
@@ -1,17 +1 @@
-'''
-pyatmos utils subpackage
-
-This subpackage defines the following functions:
-
-Const.py - Defines some basic physical constants at sea level.
-
-try_download.py
-    tqdm_request - Try to download files from a remote server by request with a colored progress bar.
-
-utils.py
-    vectorize - Vectorize a number(int, float) or a list to a numpy array.
-    wraplon - Wrap a longitude in range of [0,360] to [-180,180]
-    hms_conver - Convert the form of hour/minute/second to hours and seconds.
-    alt_conver - Fulfill conversions between geometric altitudes and geopotential altitudes. 
-    check_altitude - Checks if altitudes are inside a valid range.
-'''
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