Wis. Sex Offenders to be GPS tracked for Life

From the Milwaukee Journal Sentinel (Will need to scroll).

About 400 child sex offenders would begin lifetime tracking by satellite starting next year ... devices tracked by global positioning satellites would start being used on serious child sex offenders on Jan. 1. The plan would cost $5.8 million through mid-2009 ... The changes announced today would again provide lifetime monitoring.

I wonder what system they are using to store all these locations? Just think about adding and storing GPS coordinates every minute, for 400 persons, 24/7/365 for the next 50+ years. That's 210 million points each year. It gets even more complicated if there are any fence/perimeter alerts.

Update 6/7/2006: There's more in-depth article from the Journal Sentinel today