A GPS tracking unit is a device that uses the Global Positioning System to determine the precise location of a vehicle, person, or other asset to which it is attached and to record the position of the asset at regular intervals. The recorded location data can be stored within the tracking unit, or it may be transmitted to a central location data base, or internet-connected computer, using a cellular (GPRS or SMS), radio, or satellite modem embedded in the unit. This allows the asset’s location to be displayed against a map backdrop either in real time or when analyzing the track later, using GPS tracking software.
GPS tracking devices are used to locate objects virtually anywhere in the world using satellite technology. Most are small enough to covertly fit inside most everyday objects. Moving or tampering with the object triggers a silent alarm, alerting the owner that the object is mobile. The owner or police can then view the object’s path through a mobile phone or computer wherever it goes.
A GPS tracker essentially contains GPS module to receive the GPS signal and calculate the coordinates. For data loggers it contains large memory to store the coordinates, data pushers additionally contains the GSM/GPRS modem to transmit this information to a central computer either via SMS or via GPRS in form of IP packets. The diagram (see figure) depicts hardware architecture of an advanced GPS tracker.
GPS tracking & GPS Logger devices are finding their way into many new tracking applications, including organ donor shipments, child safety, vehicles and large equipment recovery, undercover police stakeouts where officers use the panic button to signal distress, and wildlife movement. For example, one Letstrak customer used GPS to track alligators’ movement patterns.
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