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GPS Technology Topics

Diverse GPS launch techniques affect just how much time is necessary to get location.

GPS Hot Start describes whenever the GPS enabled cell phone retains its last calculated position, the satellites which were in view at the time, as well as the almanac information in memory, and makes an attempt to lock onto the same satellites and calculate a brand new location based upon the previous data. This is usually the quickest GPS lock but Hot Start only works if the phone is generally in the same location as when the GPS was last switched off.

GPS Warm Start means whenever the GPS enabled smartphone keeps its last known location, and almanac used, but not which satellites were in range. It performs a reset and tries to find satellite signals and calculates the latest location. The GPS receiver narrows the choice of which satellites tolook for because it stored its last known position and also the almanac data helps identify which satellites are in range. The Warm Start is going to take more time compared to Hot Start but not as much as a Cold Start.

With GPS Cold Start, the device deletes all the previous information, and attempts to locate satellites and achieve a GPS lock. This usually takes more time because there is no known reference information. The GPS enabled handset receiver must try to lock onto a satellite transmission from any available satellites.

So that you can have improved GPS lock times (the timeframe it takes to be able to lock onto a GPS Satellite signal) cell phone manufacturers and network operators created Assisted GPS technology. It downloads the ephemeris and helps triangulate the smartphone general location. GPS Receivers can get a faster lock in exchange for a few kilobytes of data transmission.

Assisted GPS, also referred to as A-GPS or AGPS, enhances the performance of standard GPS in cell phones connected to the cellular network. In the US Sprint, Nextel, Verizon Wireless, and Alltel all use AGPS. Which is a method of using the cell network to accelerate acquisition of GPS satellites. A-GPS improves location tracking performance of mobile phones (and also other related devices) in two ways:

One method will be assisting to get a more rapid “time to first fix” (TTFF). Assisted GPS acquires and archives data about satellite location via the cell network so the position data does not require to be downloaded via the satellite.

The next way is by helping locate devices when GPS signals are weak or not available. Due to the fact GPS satellite signals may be impeded by tall structures, and do not pass through building interiors well Assisted GPS uses proximity to cellular towers to approximate position when GPS signals are not accessible.

To help you trace a cell phone entails various key methods of calculating cell phone position. GPS (Global Positioning System/Satellites), Triangulation, and CellID. All these technologies convert mobile phones into mobile monitoring devices. These types of systems can be considered as Network Based, Handset Based or a Hybrid approach. GPS location is Handset based mainly because it involves programs installed on the mobile phone together with GPS hardware. Triangulation and CellID are Network Based since they use the equipment and information from the wireless provider. Hybrid techniques integrate techniques to make best use of available data and also to help make perform faster.

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