Equine Speedometers
Makarand writes "According to this article in The New Zealand Herald
scientists at Massey University (NZ) are using
GPS to
monitor racehorses during their training programme. GPS technology is being used to follow horses around a racetrack and measure how far and fast horses gallop each day. This GPS data along with heart rate measurements is transforming racehorse training into a science."
Just go to gpsports.com. The SPI 10 unit can do everything the horse unit can do, plus there is some nifty software so you can make pseudo-3D maps upon returning to your home PC after your workout, as well as altituted and barrometric pressure. Supposedly the unit averages multiple surveying techniques allowing an extremely accurate survey of speed. However, the price is quite steep. Expect to be shelling out at least 1500 bucks, plus more for software upgrades.
Timex is selling a device called the Bodylink that does all this: GPS + Data Recorder + Heart Rate Monitor.