A peek under the hood at Sportvision

Pinpointing the racers during a NASCAR event requires a team of engineers and producers, and some cool military technology.

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1. The black box

The heart of the RACEf/x system is a GPS device, a modem, and an inertial measurement unit first used in smart bombs.

By Jeffrey M. O'Brien

Last updated October 15 2008: 12:17 PM ET

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