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How GPS Tracking Device works

Январь 11th, 2016 by homesecuirtycameras and tagged , , ,

Navigation employing GPS and inertial sensors is a synergistic relationship. The integration of these two types of sensors not only overcomes performance issues found in each individual sensor, but also produces a system whose performance exceeds that of the individual sensors. portable GPS tracking provides bounded accuracy, while inertial system accuracy degrades with time. Not only does the GPS sensor bound the navigation errors, but the GPS sensor calibrates the inertial sensor. In navigation systems, GPS receiver performance issues include susceptibility to interference from external sources, time to first fix, interruption of the satellite signal due to blockage, integrity, and signal reacquisition capability. The issues related to inertial sensors are their poor long-term accuracy without calibration and cost.

Today digital advancements make it possible to pre-program asset GPS tracking device on common routes you usually tread on with the vehicle and the trackers will also bookmark your work and home GPS coordinates. This allows the tracker to automatically notice changes to common routes and begin emitting readings that raise alerts well in advance. vehicle GPS locator tend to be very discrete and will have unique and personalized beepers and sounds alerting the driver or owner regarding an unplanned reroute and they are required to respond by accepting the same by pressing a secret hidden button.

One primary concern with using GPS as a stand-alone source for navigation is signal interruption. Signal interruption can be caused by shading of the GPS antenna by terrain or manmade structures (e.g., buildings, vehicle structure, and tunnels) or by interference from an external source. Each vertical line in this figure indicates a period of shading while driving 460 Integration of GPS with Other Sensors and Network Assistance in an urban environment. The periods of shading (i.e., less than three-satellite availability) are caused by buildings and are denoted by the black lines in the lower portion. (This experiment was conducted when five to six satellites above a 5º mask angle were available for ranging.)

GPS tracker works by the process of triangulation. (Technically, it is called trilateration because it calculates your position using distances rather than angles, but the concept is similar, and the terms are often used interchangeably.) When only three usable satellite signals are available, most receivers revert to a two-dimensional navigation mode by utilizing either the last known height or a height obtained from an external source. If the number of usable satellites is less than three, some receivers have the option of not producing a solution or extrapolating the last position and velocity solution forward in what is called dead-reckoning (DR) navigation. Inertial navigation systems (INSs) can be used as a flywheel to provide navigation during shading outages. The discrete-time nature of the GPS 3G in some equipment is also of concern in real-time applications, especially those related to vehicle control. if a vehicle’s path changes between updates, the extrapolation of the last GPS measurement produces an error in the estimated and true position. This is particularly true for high-dynamic platforms, such as fighter aircraft. In applications where continuous precision navigation is required, inertial sensors can be employed. An alternative solution is the use of a GPS receiver that provides higher rate measurement outputs.

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GPS applications - personal vehicle tracking devices

Январь 8th, 2016 by homesecuirtycameras and tagged , , ,

Understanding the right positions and directions of people and objects is a significant issue from the ancient eras to the present. In the past, people often launched a war in order to satisfy the craving for the dominating powers and spread their realms. In the recent, Global Satellite Positioning System (GPS) has become the one of most popular positioning technologies. GPS can provide users precise positioning information, no matter wherever that may present their own positions. The early GPS positioning technology has been widely used in military, marine use, until recently gradually applied into our daily life, e.g. automotive navigation, geodesy surveying, etc. In this chapter, the authors will briefly introduce some GPS issues including the origins of GPS, GPS system architecture, and related vehicle GPS tracking device applications.

The most driving purpose is to traverse to the destination safely, efficiently, and comfortably. Two types of approaches could achieve the goals, including the static and dynamic approaches. In the static aspect, vehicles use the static road and traffic information to navigate. Conversely, in the dynamic aspect, vehicles adopt the dynamic information instead. However, both of the two approaches first require getting the vehicle’s location and then map the position on an e-map. Thus, this chapter first introduces some important vehicle location determination algorithms: the dead reckoning and global position system algorithms, in which the precision of location technologies are compared. Then, the map-matching algorithm is described in detail. Finally, various vehicle navigation approaches are detailed, in which the important topics include: the navigation architecture, the navigation routing algorithm, and navigation applications.

The aim of tracking platform is to guide the vehicle along the optimal path from the starting point to destination. A reliable vehicle navigation system can reduce the traffic chaos in the city and improve the transportation delay. In order to achieve reliable vehicle navigation system, the detail system requirements, system analysis, and system architecture are shown in the chapter. Each component of vehicle navigation system is briefly illustrated, and the system communication is also described. They also present the architecture of the proposed vehicle navigation system, and show the difference of these systems. Therefore this chapter helps understanding the architecture of vehicle navigation system.

A smart GPS tracking device will tell you everything you want to know about the location of the vehicle, the speed at which it is traveling as well as the other conditions in that locality. It will give you a peace of mind as you now know clearly where the vehicle is. Moreover, you don’t have to worry constantly about calling up the driver every other minute to find out the status of the travel. There are some tracking systems that will also keep sending constant updates to your Smartphone. So, even if you are on the move and away from your laptop or desktop, you can still keep track of the vehicle.

Most electronic tracker work based on GPS, known as Global Positioning System. Hi-end systems even give you real time data imports. A good tracking system can keep track of multiple vehicles at the same time. So, if you are running a taxi service or is a college administrator keeping tracks of the many buses you have in your college fleet, you can keep track of all the vehicles using one system. When you are installing an online vehicle tracking system, you can be assured of the safety of your loved ones. Keep an eye them from afar with these high-tech tracking systems.

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