GPS Can be Found In Various of Consumer Products for Tracking Phones

GPS receivers often take a long time to become ready to navigate after being turned on because it must acquire some basic information in addition to capturing GPS satellite signals. This slow start is sometimes caused if the GPS mobile phone has been turned off for days or weeks, or has been moved a far distance while unused 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 satellite signals and compute initial location more quickly.

So as to have better GPS lock times cellphone manufacturers and network operators created Assisted GPS technology. It downloads the ephemeris helping triangulate the cell phone general location. GPS Receivers will get a quicker lock at the expense of a few kilobytes of data transmission.

Assisted GPS, generally known as A-GPS or AGPS, boosts the performance of standard GPS in handsets connected to the cellular network. In the US Sprint, Nextel, Verizon Wireless, and Alltel all use AGPS. This is a method of using the cellular network to speed up finding of GPS satellites. A-GPS improves location tracking functions of mobile phones (along with other related devices) in a couple of ways:

The first method is by helping to get a faster “time to first fix” (TTFF). Assisted GPS gets and stores information concerning satellite position via the cellular network and so the location data does not need to be downloaded from the the satellite.

The second way is by assisting position handsets when GPS signals are weak or impeded. Since GPS satellite signals may be impeded by tall buildings, and do not penetrate building interiors well Assisted GPS employs distance to cellular towers to compute position when GPS signals are not accessible.

In the event that satellite signals are not readily available, or precision is less important than life of the battery, employing Cell-ID is a good substitute to GPS mobile phone location. The location of the smartphone can be calculated by the cell network cell id, that recognizes the cell tower the phone is using. By having the position of this tower, then you can know approximately the spot where the handset is. However, a tower can cover a large area, from a few hundred meters, in high populationdensity locations, to several miles in lower density areas. This is why location CellID precision is lower than GPS accuracy. Having said that monitoring via CellID still gives you a truly useful substitute.

Throughout this discussion keep in mind that there is a basic difference between smartphone GPS Tracking and Navigation. GPS mobile phone tracking is usually related to a third-party keeping records of either real-time or historical mobile phone position, while Navigation deals with the cell phone user figuring out how to get from point A to point B. Just because a mobile phone has GPS doesn?t mean that it can necessarily be used as a navigation device. Just like phone tracking, navigation requires third-party software.

GPS Satellites are not communications satellites. Geostationary or communications satellites use a higher altitude 22,300 miles above the equator. These satellites are used for weather forecasting, satellite TV, satellite radio and most other types of global communications. At exactly 22,000 miles above the equator, the earth’s gravitational force and centrifugal forces are canceled and are in balance. This is the best location to position a communications satellite. The earth rotates at about 1,000 miles an hour, and because of their high earth orbit the geostationary satellites need to travel at about 7,000 mph to keep position. This is approximately the same speed as GPS satellites, but since stationary satellites are 10,000 miles further away they don?t move relative to the earth.

The GPS Control Segment includes Master Control Station, an Alternate Master Control Station, and a host of dedicated and shared Ground Antennas and Monitor Stations that work together to ensure the satellites are functioning correctly and the data they beam down to earth is accurate.
The GPS User Segment is comprised of of GPS receivers taking the shape of mobiles and , laptops, in-car navigation devices and hand-held tracking units along with the people that use them, and the software programs that make them work.

GPS receivers determine location by precisely timing the signals transmitted by GPS satellites. This data includes the time the message was transmitted, precise orbital information (the ephemeris), and the general system health and rough orbits of all GPS satellites (the almanac).

Cell tracking, cell phone GPS and mobile phone tracking programs are unquestionably securing particular attention from potential customers, cellular phone companies and program developers. Track Cell Phone GPS and Parental Control Software. The most current cell phones provide GPS locator features to track cell phone location.

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