By Robert Lett
Big brother is tracking you. Not tracking you, but tracking your cell phone. Each time your phone authenticates at a cell tower, this information is stored at the Cell Office for billing purposes. From this record it is possible to place a cell user in a general area, using one main tower and two other weaker towers your position can be located down to about 50 feet, and this is without GPS assistance. Mobile carriers usually only release this data with a court order. In San Diego, prosecutors used this method to track the whereabouts of David Westerfield and to convict him of the murder of seven year old daughter Danielle Van Dam. His cell records revealed his movements in the days after Danielle’s disappeared. Another way to track cellular users is through technology that calculates the time difference in arrival of a cellular signal among multiple towers, or the angle of arrival. These techniques can help locate a cellular customer within a much smaller area than by using Cell Office records alone. This technology is used to locate people calling the 911 service from mobile phones, but it could just as easily be used in a criminal prosecution. GPS units are already being installed in newer handset units. These units, of course, will give an exact location of the cell phone in use, (give or take a few feet).
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