Instead of satellites，Locata uses ground­based ，and the makers claim the receivers can be shrunk to fit inside a regular cellphone. Even the US military，which invented GPS technology，signed a contract last month agreeing to a large­scale test of Locata at the White Sands Missile Range in New Mexico.try，”says Nunzio Gambale，CEO and co­founder of the firm Locata，based in Griffith，Australia.，Christopher Morin of the US Air Force testd it recently at White Sands，and it worked to within 18 centimeters along any axis(轴)．Morin says it should be possible to get the resolution down to 5 centimeters.，the tests were performed in an open desert where GPS also works beautifully，but its signals are weak—like a car headlight(前灯) from 20，000 kilometers away­and easily blocked by solid objects. Locata’s signal is far stronger，though not guaranteed to work in a complex urban environment，says David Last, consultant to the UK’s General Lighthouse Authorities. to transform indoor navigation.But it could shine in specific areas，”Gambale says.“Robots with Locata could easily navigate inside buildings without the complex optical systems they need at the moment.And process that handle precise location data could not only guide you around a mall，railway station or airport，but also take you to the exact shelf in a shop for the product you want.The units small and cheap n its way towards world domination.”

　　解题导语　是不是已经习惯了使用GPS定位系统，有没有比GPS更好的定位系统呢？下面这篇文章会告诉我们答案。________．ositioning system Locata

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