diff --git a/sgp4/__init__.py b/sgp4/__init__.py
index <HASH>..<HASH> 100644
--- a/sgp4/__init__.py
+++ b/sgp4/__init__.py
@@ -37,7 +37,7 @@ Then invoke the tests using the Python Standard Library::
 
 The C++ function names have been retained, since users may already be
 familiar with this library in other languages.  Here is how to compute
-the x,y,z position and velocity for Vanguard 1 at 12:50:19 on 29
+the x,y,z position and velocity for the International Space Station at 12:50:19 on 29
 June 2000:
 
 >>> from sgp4.api import Satrec
Minor documentation fix (#<I>)

Update the documentation — the TLE referenced as "Vanguard 1" in the docs looks like it is actually from the ISS.