GPS module suits wireless handsets

What is GPS?
Acronym for Global Positioning System. A series of 24 geosynchronous satellites that continuously transmit their position. Used in personal tracking, navigation and automatic vehicle location technologies. GPS was developed and is operated by the U.S. Department of Defense (U.S. DoD). Inherent errors implemented by the U.S. DoD create inaccuracies of more than 100m. Europe is building its own civilian-run positioning system, called Galileo. Its network of 30 satellites should be fully operational in 2010.

What is RF? What is an RF tuner?
Radio frequency (RF) is the range of electromagnetic frequencies above the audio range and below infrared light (from 10kHz to 300GHz).
RF tuner
An RF tuner is a circuit module or standalone equipment that detects radio-frequency (RF) signals usually of low amplitude and amplifies and converts them to a form suitable for further processing.