GPS Cell Phone Tracking

The tragedy of 9/11 nudged GPS tracking into the future, particularly GPS technology in cell phones. At that time, calls from a cell phone could not be tracked, which made locating victims and rescue workers more difficult. As a result, the federal government mandated that by the end of 2005, all cell phones must include the capability of being traced within 100 meters.

Cell phone carriers responded by placing the GPS information in the phones themselves, giving the world the new capability of GPS cell phone tracking--but initially only when a 911 call was transmitted. This new capability was termed E911.

GPS Cell Phone - Portable Navigation and Safety

The need for a GPS cell phone? Picture driving an unfamiliar highway and witnessing a small red car careening off the road into a ravine. You pull off the highway and with your heart pounding you get out of your car to find the red Chevy about 80 feet below - upside down. You realize someone may be hurt badly. Fortunately you have a cell phone, as many people do. You call 911 but you don't know where you are other than on Route 95 about an hour north of Needles in the deserts of Nevada...

GPS Car Navigation: 7 Things You Need to Know

With advancing technology, GPS car navigation (sometimes called "portable GPS") is becoming more and more practical. Features like automatic routing, voice-guided navigation, and route re-calculating are more refined. Over the past few years, less expensive units have come on the market. Although the average price of GPS car navigation has dropped a little, the value has increased with more, and better, features.

Bluetooth GPS Primer

Bluetooth GPS is a combination that allows you to have a wireless GPS unit display on a Bluetooth-enabled device such as a PDA or Pocket PC.

Bluetooth® is a worldwide standard by which portable handheld devices, mobile phones, mobile computers and other accessories can work with each other without wires. The standard was developed by the Bluetooth Special Interest Group (SIG). If you're wondering, the name was inspired by the 10th century Danish King Harald Bluetooth, known for unifying Denmark and Norway.

Aviation GPS - Soon to be the Sole Means of Air Navigation

Aviation GPS is now commonly used throughout the world to compensate for many of the inadequacies in today's air traffic system. Satellite navigation provides a primary navigation service that meets many of the requirements of users around the globe. Accurate aircraft position can be determined anywhere near or on the surface of the earth with satellite navigation - ground-based equipment cannot do that.

Implementation

GPS Antenna Primer: Improve Your Navigation

Most GPS receivers have an antenna built in to them. The two most popular types of antennas used in GPS receivers are "patch" and "quadrifilar helix" or "quad helix" for short. This page addresses external GPS antennas which are normally used when stronger satellite signals are needed.

Many models are mounted magnetically to the roof of a vehicle. Models that are made for buildings are often mast-mounted. Most models are available with a wide range of connectors for all the various GPS receiver antenna jacks.

GPS Accuracy - How Accurate is it?

To determine an object's location, the GPS system must receive a radio signal from at least three satellites. Since each satellite emits a unique signal, the receiver can then match the signal to the satellite and its orbital position. Distance from the receiver is then calculated (for each satellite), and from that data, the receiver accurately calculates its geographic position. But just how accurate is GPS?

What affects GPS accuracy