http://engineeringtv.com/blogs/etv/archive/2008/11/18/alien-technology-rfid.aspxAs RFID expands into more applications, the simple knowledge that a given tag was seen at a certain read point is sometimes inadequate. For some applications we’d like to know more. Was the tag moving or stationary? Which direction? How fast? How farenCommunityServer 2007.1 (Debug Build: 20917.1142)