How To Track Cell Phone GPS

Cell tracking, mobile GPS and cell phone GPS track software packages are unquestionably attracting interest from potential customers, mobile phone businesses and software designers. The most current cell phones feature GPS position features to track cellphone location.

GPS receivers, regardless of whether in a mobile phone, or perhaps a dedicated Gps tracking device, determine specific location through precisely timing the signals sent by GPS satellites. This information incorporates the moment the message was transmitted, specific orbital details (technically referred to as the ephemeris), as well as the basic system state and determined orbits of all GPS satellites (formally referred to as the almanac). GPS receivers sometimes take a long time to become ready to navigate after being turned on because it must acquire some basic information in addition to finding GPS satellite signals. This delay is sometimes caused when the GPS cell phone has been unused for days or weeks, or has been moved a far distance while turned off for. The GPS must update its almanac and ephemeris data and store it in memory. The GPS almanac is a set of data that every GPS satellite transmits. When a GPS receiver has current almanac data in memory, it can acquire satellite signals and find initial location more quickly.

GPS Hot Start means whenever the GPS enabled smartphone retains its last known location, the satellites which were in view at the time, and also the almanac information in memory, and attempts to obtain the same satellites and compute a new position based upon the previous data. This is generally 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 when the GPS enabled device recalls its last known location, and almanac used, but not which satellites were in view. It resets and makes an attempt to lock onto satellite signals and computes a fresh location. The GPS receiver has a general idea of which satellites tolook for since it saved its last known position and the almanac data helps determine which satellites are visible in the sky. The Warm Start is going to take more time than the Hot Start but not as long as a Cold Start. With GPS Cold Start, the device deletes all the previous data, and attempts to locate satellites and obtain a GPS lock. This usually takes the longest because there is no known reference information. The GPS enabled cell phone receiver must try to lock onto a satellite signal from any available satellites.

So as to get better GPS lock times cellular phone manufacturers and telco operators designed Assisted GPS technology. This downloads the ephemeris and helps triangulate the mobile phone basic 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, improves the performance of standard GPS in handsets connected to the cell network. In the US Sprint, Nextel, Verizon Wireless, and Alltel all use AGPS. Which is a method of using the cell network to speed up acquisition of GPS satellites.

A-GPS assists location tracking functions of smartphones (and other related devices) in two ways:

The first method is by assisting to get a faster “time to first fix” (TTFF). AGPS receives and archives data in relation to satellite position via the cell network so the position details does not need to be downloaded via the satellite.

The next way is by assisting position devices when GPS signals are weak or blocked. Due to the fact GPS satellite signals may be impeded by tall buildings, and do not pass through building interiors well AGPS utilizes distance to cellular towers to approximate position when GPS signals are not accessible.

When satellite signals are not readily available, or accuracy is less important than life of the battery, using Cell-ID is a viable substitute to GPS cell phone tracking. The position of the cell phone might be estimated by the cell network cell id, which determines the cell tower the cell phone is connected to. By knowing the position of this tower, then you can know approximately the location where the smartphone will be. Nonetheless, a tower can cover a massive area, from a couple of hundred meters, in high populationdensity regions, to several kilometers in lower density regions. For this reason location CellID accuracy is less than than GPS accuracy. Even so tracking from CellID still provides a truly handy substitute.

Another way of formulating smartphone position is Triangulation or Mobile Location Services (MLS). Cell Tower Triangulation makes use of signal analysis data to compute the time it takes signals traveling from your mobile phone to no less than three cell towers to calculate location.

How To Track Cell Phone GPS