Fingerprinting the Intercity train from Antwerp to Ghent

Using GPRS on a train is not very useful for interactive use, but for reading the occasional website or downloading some (not-too-big) files it works well enough (after considerable tweaking).

When I start my link, I always run My traceroute to my ISP's DNS to see how my link is doing in real-time. Which helps to understand what is happening, here is a screenshot of a typical train-ride from Antwerp to Ghent.