Noisy School Kids: Using GPS in an Urban Environment
نویسندگان
چکیده
The Global Positioning System (GPS) was initially developed by the US Department of Defence in the 1980s. Civilian use of GPS was primarily restricted to navigation, with the accuracy of the signal downgraded through Selective Availability (SA). Since May 2000, however, SA has been disabled, allowing civilian users to obtain positional fixes of much higher accuracy. This has led to improvements in existing applications such as in-car navigation systems and the development of novel, new applications such as pay-as-you-drive car insurance (Norwich Union, 2007) and electronic baby-sitting. Parallel developments in mobile computing have led to the advent of Location-Based Services (LBS) in which the information the mobile user receives is geographically dependent (see Brimbicombe, 2007, for a review of LBS).
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