Solutions Created for Emergency Response Are Available for Tracking Smartphones. GPS tracking, mobile GPS and cell phone tracker programs are undoubtedly getting a lot of focus from potential customers, cellphone companies and application makers. The most up-to-date cell phones provide GPS locator attributes to track phone position.
To abide by Federal Communications Commission guidelines, cell phone companies must be able to give authorities with smartphone latitude and longitude to an precision of 50 to 300 meters. Cell Tower Triangulation does not always meet this condition. For evaluation, commercially available GPS systems are able to acquire precision right down to 3-10m. This is dependent upon numerous factors, as GPS signals are often quite weak and they are affected by numerous environmental factors. With Mobile Location Services (MLS), the GSM cellular network provider uses triangulation techniques to calculate the position of the smartphone, its accuracy is proven to be less than than that of GPS. MLS is also impacted by factors similar to GPS in the sense of the barriers impeding signal strength and the density of GSM towers to help in the triangulation effort. In remote areas location accuracy may be off as much as a mile.
GPS Hot Start is the term for when the GPS enabled cell phone remembers its last calculated location, the satellites that were in view before, as well as the almanac data in memory, and attempts to connect to the same satellites and determine a fresh position based upon the previous information. 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 refers to whenever the GPS enabled cell phone keeps its last calculated position, and almanac used, but not which satellites were in range. It performs a reset and attempts to connect to satellite signals and computes a new location. The GPS receiver has a general idea of which satellites tolook for because it kept its last known position and also the almanac data helps determine which satellites are in range. The Warm Start will need longer than the Hot Start but not as long as a Cold Start. With GPS Cold Start, the device deletes all the previous data, an
d attempts to find satellites and achieve a GPS lock. This takes more time because there is no known reference information. The GPS enabled cell phone receiver has to attempt to lock onto a satellite transmission from any accessible satellites.
So as to get improved GPS lock times cellphone manufacturers and system operators developed Assisted GPS technology. This downloads the ephemeris helping triangulate the cell phone basic position. GPS Receivers can get a faster lock in return for a few kilobytes of data transmission. Assisted GPS, often known as A-GPS or AGPS, boosts the performance of standard GPS in smartphones connected to the cell network. In America Sprint, Nextel, Verizon Wireless, and Alltel all use A-GPS. Which is a means of using the cellular network to accelerate finding of GPS satellites.
A-GPS improves location tracking performance of smartphones (and also other connected devices) in a couple of ways:
One method is by helping to acquire a faster “time to first fix” (TTFF). Assisted GPS acquires and stores information in relation to satellite location using the cell network and so the location data does not need to be downloaded from the the satellite.
The second way is by assisting locate smartphones when GPS signals are weak or not available. Since GPS satellite signals may be interfered with by tall buildings, and do not go through building interiors well Assisted GPS makes use of proximity to cellular towers to estimate position when GPS signals are not accessible.
When satellite signals are not obtainable, or accuracy is less important than battery life, making use of Cell-ID is a useful substitute to GPS smartphone tracking. The location of the handset might be computed by the cellular network cell id, which pinpoints the cell tower the cellphone is connected to. By having the location of this tower, you may know roughly the spot where the handset might be. Nonetheless, a tower can cover a large area, from a couple of hundred meters, in high populationdensity regions, to a few miles in lower density regions. This is why location CellID precision is less than than GPS accuracy. Nonetheless location from CellID still gives you a truly handy alternative.
Another way of determining cell phone location is Triangulation or Mobile Location Services (MLS). Cell Tower Triangulation utilizes signal analysis data to compute the time it takes signals to travel from the mobile phone to at least three cell towers to determine position.
Info about Cell Phone Programs for GPS Tracking
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