Solutions Produced for Emergency Response May Be Used for Keeping Track of Your Children. Cell tracking, cell phone GPS and cell phone GPS track software programs are really drawing curiosity from consumers, cellular telephone companies and software coders. The most recent cell phones integrate GPS location capabilities to track cellular phone position.
GPS receivers, whether or not in a phone, or simply a dedicated Portable gps tracking device, determine location through process of precisely timing the signals sent by GPS satellites. This information comes with the time the message was transmitted, exact orbital data (formally referenced as the ephemeris), as well as the overall system health and estimated orbits of all GPS satellites (technically referred to as the almanac). GPS receivers often take a long time to become ready to navigate after it’s turned on because it must acquire some basic information in addition to finding GPS satellite signals. This delay can be caused when the GPS device has been unused for days or weeks, or has been moved a significant 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 capture signals and compute initial location faster.
GPS Hot Start refers to whenever the GPS enabled device remembers its last calculated position, the satellites which were in view before, together with the almanac information in memory, and tries to lock onto the same satellites and determine a brand new location based upon the previous information. 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 turned off. GPS Warm Start means whenever the GPS enabled mobile phone recalls its last known position, and almanac used, but not which satellites were in range. It performs a reset and attempts to lock onto satellite signals and computes a whole new position. The GPS receiver has a general idea of which satellites tolook for since it kept its last known position and also the almanac data helps determine which satellites are in range. The Warm Start will take longer compared to Hot Start but not as long as a Cold Start. With GPS Cold Start, the device deletes all the previous data, and tries to locate satellites and obtain a GPS lock. This usually takes the longest because there is no known reference data. The GPS enabled handset receiver must attempt to lock onto a satellite signal from any available satellites.
So as to get better GPS lock times cellphone manufacturers and system providers developed Assisted GPS technology. This downloads the ephemeris and helps triangulate the mobile phone general location. GPS Receivers can get a quicker lock in return for a few kilobytes of data transmission. Assisted GPS, also referred to as A-GPS or AGPS, boosts the performance of standard GPS in devices connected to the cellular network. In America Sprint, Nextel, Verizon Wireless, and Alltel all use Assisted GPS. Which is a means of using the cellular network to accelerate acquisition of GPS satellites.
A-GPS assists location tracking functions of mobile phones (and other connected devices) in two ways:
The first way will be assisting to secure a more rapid “time to first fix” (TTFF). AGPS gets and stores data concerning satellite location via the cellular network and so the location details does not need to be downloaded via the satellite.
A subsequent technique is by assisting position mobile phones when GPS signals are weak or blocked. Since GPS satellite signals may be interfered with by tall buildings, and do not penetrate building interiors well Assisted GPS employs proximity to cellular towers to estimate position when GPS signals are not obtainable.
When satellite signals are not readily available, or accuracy and precision is less important than battery life, employing Cell-ID is a useful alternative to GPS cell phone tracking. The position of the cell phone may be computed by the cellular network cell id, which determines the cell tower the cell phone is using. By knowing the position of the tower, then you can know approximately the location where the smartphone is. However, a tower can cover a massive area, from a few hundred meters, in higher populationdensity regions, to a few kilometers in lower density regions. This is why location CellID precision is lower than GPS accuracy. Having said that monitoring from CellID still offers a very helpful alternative.
Another way of formulating handset position is Triangulation or Mobile Location Services (MLS). Cell Tower Triangulation uses signal analysis data to calculate the time it takes signals traveling from your smartphone to a minimum of 3 cell towers to determine position.
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