Read the article I wrote on the SVN 49 issue. It is out on the Inside GNSS
"frontpage" (http://insidegnss.com) now and will be included in the
July/August printed version

The article nicely shows and explains what is being done and why that works
(for "ordinary" users).

For the direct link to the article visit my blog at:
http://gnss.servolux.nl/gnss_blog.html

Tim