diff --git a/.DS_Store b/.DS_Store
index e03b78d..bf75453 100644
Binary files a/.DS_Store and b/.DS_Store differ
diff --git a/.travis.yml b/.travis.yml
deleted file mode 100644
index b1fe495..0000000
--- a/.travis.yml
+++ /dev/null
@@ -1,5 +0,0 @@
-language: python
-python:
-  - "3.7"      
-  - "3.8"
-  - "3.9" # current default Python on Travis CI
\ No newline at end of file
diff --git a/pyatmos/.DS_Store b/pyatmos/.DS_Store
index 102822b..13a7ac9 100644
Binary files a/pyatmos/.DS_Store and b/pyatmos/.DS_Store differ
diff --git a/pyatmos/__init__.py b/pyatmos/__init__.py
index 2a9c16c..3724ef3 100644
--- a/pyatmos/__init__.py
+++ b/pyatmos/__init__.py
@@ -1,16 +1,17 @@
 '''
 pyatmos package
 
-This package is an archive of scientific routines that implements the 
-estimation of atmospheric properties for various atmosphere models, such
-as exponential, coesa76, and nrlmsise00. 
+This package is an archive of scientific routines that implement the 
+estimation of atmospheric properties for various atmospheric models, such
+as exponential, coesa76, nrlmsise00, and jb2008. 
 
-The package mainly estimates density, temperature, pressure and other parameters 
-of air at a set of specific altitudes. For atmosphere below 86 kilometers, it also 
-calculates the speed of sound, viscosity, and thermal conductivity.
 '''    
 
 from .standardatmos.expo import expo
 from .standardatmos.coesa76 import coesa76
-from .msise.spaceweather import download_sw,read_sw
-from .msise.nrlmsise00 import nrlmsise00
\ No newline at end of file
+
+from .msise.spaceweather import download_sw_nrlmsise00,read_sw_nrlmsise00
+from .jb2008.spaceweather import download_sw_jb2008,read_sw_jb2008
+
+from .msise.nrlmsise00 import nrlmsise00
+from .jb2008.jb2008 import jb2008
\ No newline at end of file
diff --git a/pyatmos/jb2008/.DS_Store b/pyatmos/jb2008/.DS_Store
new file mode 100644
index 0000000..5008ddf
Binary files /dev/null and b/pyatmos/jb2008/.DS_Store differ
diff --git a/pyatmos/jb2008/__init__.py b/pyatmos/jb2008/__init__.py
new file mode 100644
index 0000000..4d2550e
--- /dev/null
+++ b/pyatmos/jb2008/__init__.py
@@ -0,0 +1,16 @@
+'''
+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
+
+'''              
\ No newline at end of file
diff --git a/pyatmos/msise/__init__.py b/pyatmos/msise/__init__.py
index 0ba3135..793b7b5 100644
--- a/pyatmos/msise/__init__.py
+++ b/pyatmos/msise/__init__.py
@@ -3,14 +3,14 @@ pyatmos msise subpackage
 
 This subpackage defines the following functions:
 
-# nrlmsise00.py  - Implements the NRLMSISE 00 model
+nrlmsise00_subfunc.py  - subfunctions that implement the atmospheric model NRLMSISE-00
 
-# spaceweather.py 
+nrlmsise00.py  - Input interface of NRLMSISE-00
 
-download_sw - Download or update the space weather file from www.celestrak.com
+spaceweather.py
 
-read_sw - Read the space weather file
+    download_sw_nrlmsise00 - Download or update the space weather file for NRLMSISE-00 from www.celestrak.com
 
-get_sw - Extract the space weather data  
+    read_sw_nrlmsise00 - Read the space weather file for NRLMSISE-00
 
 '''              
\ No newline at end of file