Global Positioning System(GPS) tracking is an electronic aided technique used in working out exactly where something is. A GPS tracking system, for example, may be placed in a vehicle, on a cell phone, or on special GPS devices, which can either be a fixed or portable unit. GPS works by providing information on the exact location. It can also track the movement of a vehicle or person. So, for example, a GPS tracking system can be used by a company to monitor the route and progress of a delivery truck, and by parents to check on the location of their child, or even to monitor high-valued assets in transit.
The Global Navigation Satellite System (GNSS) network is a very vital element of the GPS tracking system. This network incorporates a range of satellites that use microwave signals that are transmitted to GPS devices to give information on location, vehicle speed, time and direction. So, a GPS tracking system can potentially give both real-time and historic navigation data on any kind of journey.
Also, GPS contains a receiver that processes special satellite signals. These GPS receivers not only track the exact location but can also compute velocity and time. The positions can even be computed in three-dimensional views with the help of four GPS satellite signals. The Space Segment of the Global Positioning System consists of 27 Earth-orbiting GPS satellites. There are 24 operational and 3 extra (in case one fails) satellites that move around the Earth every 12 hours and send radio signals from space that are received by the GPS receiver.
With different tracking stations located across the globe to control the positioning system. These monitoring stations help in tracking signals from the GPS satellites that are continuously orbiting the earth. Space vehicles transmit microwave carrier signals. The users of Global Positioning Systems have GPS receivers that convert these satellite signals so that one can estimate the actual position, velocity and time.
Trilateration is the mathematical principle that governs the operation of the system. Trilateration falls into two categories: 2-D Trilateration and 3-D Trilateration. In order to make the simple mathematical calculation, the GPS receiver must know two things. First, it must know the location of the place is to be traced by at least three satellites above the place. Second, it must know the distance between the place and each of those Space Vehicles. Units that have multiple receivers that pick up signals from several GPS satellites at the same time. These radio waves are electromagnetic energy that travels at the speed of light.
A GPS tracking system can work in various ways. From a commercial perspective, GPS devices are generally used to record the position of vehicles as they make their journeys. Some systems will store the data within the GPS tracking system itself (known as passive tracking) and some send the information to a centralized database or system via a modem within the GPS system unit on a regular basis (known as active tracking) or 2-Way GPS.
A GPS tracking system that monitors location and stores its data on journeys based on certain types of events is passive. So, for example, this kind of GPS system may log data such as where the device has traveled in the past 12 hours. The data stored on this kind of GPS tracking system is usually stored in internal memory or on a memory card, which can then be downloaded to a computer at a later date for analysis. In some cases, the data can be sent automatically for wireless download at predetermined points/times or can be requested at specific points during the journey.
A GPS tracking system, also known as a real-time system uses a method that automatically sends the information on the GPS system to a central tracking portal or system in real-time as it happens is an Active System. This kind of system is usually a better option for commercial purposes such as fleet tracking or monitoring of people, such as children or elderly, as it allows a caregiver to know exactly where loved ones are, whether they are on time and whether they are where they are supposed to be during a journey. This is also a useful way of monitoring the behavior of employees as they carry out their work and of streamlining internal processes and procedures for delivery fleets.
From a security perspective, vehicle owners can pinpoint the exact location of a vehicle at any given time using Real-time tracking. And, the GPS tracking system in the vehicle may then be able to help police work out where the vehicle was taken to if it was stolen.
Importance of GPS systems
GPS is important as it helps you to figure out where you are and where you are going when you are traveling from one place to another. Navigation and positioning are important but cumbersome activities, which GPS makes it easier. Once GPS locates your position, and then it starts tracing other factors like speed, bearing, tracks, trip distance, sunrise/sunset time, distance to destination and several other details. GPS uses ‘man-made’ stars as reference points to calculate positions accurate to a matter of meters. However, with recent forms of GPS, you can make measurements much better than centimeter readings. So it is with the aid of GPS that you can give a unique and specified address to every square meter on the planet. So these days GPS finds its way into cars, planes, boats, construction equipment, smartphones, laptop computers and among other valuable assets. In addition, GPS tracking system installed in the phone can greatly help an individual to get automated GPS information through their cell phones.
Tracking using the mobile phone
The development of communications technology has long since surpassed the sole ability to access others when they are mobile. Today, mobile communication devices are becoming much more advanced and offer more than the ability to just carry on a conversation. Cell phone GPS tracking is one of those advances.
All cell phones constantly broadcast a radio signal, even when not on a call. The cell phone companies have been able to estimate the location of a cell phone for many years using triangulation information from the towers receiving the signal. However, the introduction of GPS technology into cell phones has meant that cell phone GPS tracking now makes this information a lot more accurate.
With GPS technology now more commonplace in many new smartphones, this means that the location of anyone carrying a GPS enabled smartphone can be accurately tracked at any time. Cell phone GPS tracking can, therefore, be a useful feature for business owners, parents, friends, and co-workers looking to connect with one another. Our GPS Tracking allows you to track your device on iPhone, iPad, Android, Blackberry and latest Samsung operating system.
The technology of locating is based on measuring power levels and antenna patterns and uses the concept that a mobile phone always communicates wirelessly with one of the closest base stations, so if you know which base station the phone communicates with, you know that the phone is close to the respective base station.
Advanced systems determine the sector in which the mobile phone resides and roughly estimate also the distance to the base station. A further approximation can be accomplished by interpolating signals between adjacent antenna towers. Qualified services may achieve a precision of down to 50 meters in urban areas where mobile traffic and density of antenna towers (base stations) is sufficiently high. Rural and desolate areas may see miles between base stations and therefore determine locations less precisely.
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Source Credit: EEtimes