diff --git a/astro/dgpsip/pkg-descr b/astro/dgpsip/pkg-descr
index 4ba900f651dd..dd97661b922a 100644
--- a/astro/dgpsip/pkg-descr
+++ b/astro/dgpsip/pkg-descr
@@ -20,3 +20,5 @@ error will stillb e reduced if you are 2000 to 3000 miles away.
 Several respondents from 2000 miles away have noted that the remote
 differenential signals have diminished the SA induced position and
 velocity errors by approximately 3x.
+
+WWW: http://www.wsrcc.com/wolfgang/gps/dgps-ip.html