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An acceloremeter is a premium feature found on some active GPS trackers that can offer fleet managers as well as owners of mobile assets a series of tracking benefits. You can monitor with great accuracy the speeds at which your vehicles are traveling as well as whether your crews are driving recklessly by slamming too hard on the gas and brake pedals.

Active Tracking

"Active Tracking" is the same thing as "Real Time Tracking." It gives you the visibility and monitoring capabilities you need to better look after your assets while they're in the field.

Advanced Reporting Features

As part of any high quality fleet tracking solution the many benefits that are realized by users of these AVL systems come as a result of the advanced reporting features. These are valuable, computer generated reports that neatly summarize and present to you useful information about such things as fleet activity, mileage, speeding violations, hardware events, start/stop times and many others.

Asset Tracking

Tracking valuable assets for insurance or other monitoring purposes is often a requirement for companies. Asset tracking devices provide a means of monitoring in real time the location and operating status of any tracked good. Satellites orbiting the Earth pick up the asset tracker’s GPS signal anywhere in the world and deliver the positioning information on related mapping software. Asset tracking solutions can be used to monitor cargo, machines, vehicles, shipments, containers and more.

Assisted GPS or "A-GPS"

Assisted GPS can refer to any of several different technologies. One of the more prominent uses of the terms is when discussing the accuracy with which these location finders do what they're famous for. When you consider the size of the Earth's surface most GPS trackers are quite accurate when they interpret satellite singals.  When these devices are then assisted by ground-based reference stations, such as those found in the Wide Area Augmenation Station (WAAS), their accuracy can be phenomenol.  Another popular use of "Assisted GPS" or "A-GPS" is referenced when discussing certain real time trackers' capability to continue determining their location even when their direct satellite line-of-sight is obstructed.  These special active trackers are assisted by cell phone data networks, such as the CDMA2000 Sprint/Nextel 3G network.

AVL (Automatic Vehicle Location)

This stands for Automatic Vehicle Location. It refers to an interactive online system in which a fleet manager (or any other authorized user) can see the geographic coordinates of their vehicles on a customized map. AVL can also be used to refer to the device itself as an Automated Vehicle Locator.

Cargo Tracking

Cargo tracking uses GPS systems to track cargo positions anywhere in the world. Operators who need to transport or send heavy equipment and have high cargo costs can use GPS cargo tracking systems as a supplementary transportation security measure. Generally provided with online mapping software, equipped cargo vehicles can send a GPS signal that will be picked up by satellites and can be monitored in real time on any Internet device (laptop, smartphone, tablet...). Cargo tracking is an example of asset tracking solutions for businesses.

Cellular Antenna

Because real-time GPS tracking devices usually use cellular phone infrastructure to the owner of the whereabouts of the vehicle, person or asset being tracked, all such GPS units require cellular antennas. The vast majority of active tracking devices are completely self-contained and therefore have internal cellular antennas.

Cellular Triangulation

Cellular triangulation is a technique used to identify the location of a mobile phone user or tracking device by calculating their location in-between a number of cell towers. In order for this technique to be somewhat accurate a user will need to be in range of several cell towers, such as in an urban area. In rural areas, however, a user is usually within range of just a single tower. In those cases the tower can still detect the angle of transmission and pinpoint the location of the user but only with an accuracy range of about 1 mile (1.6km).


The Chipset/Processor in your GPS device is required to make calculations on the information provided by the satellite that the unit picks up in order to determine its positioning. 32 bit processors, for example, tend to determine global positioning quicker and more efficiently than their 8 bit counterparts.


Code Division Multiple Access (CDMA) refers to the cell phone network standard which was developed in the U.S. CDMA based devices work very well in the U.S. but will not work internationally.

CEP (accuracy)

This is a fancy way to measure the precison of a GPS device's locating capability.

Container tracking

Companies using containers as a secure storage & global shipping method may want the additional security of being able to monitor and visualize on a map the exact position of their merchandise in real-time. Container tracking GPS devices can be placed inside the container without blocking the GPS signal transmission. Asset tracking for valuable belongings stored in containers is also an important feature for insurance companies.

Covert Tracking

Sometimes law enforcement, employers or other private individuals would like to track the movements of a suspect, employee or other person without their knowledge. Using special GPS tracking devices that are very small and discreet, these secretive tracking operations are commonly referred to as "covert tracking." Many tiny active GPS tracking units have optional, nondescript cases with magnetic exteriors that allow the devices to be placed beneath a vehicle where detection is very difficult.


Acronym for "Differential GPS." This is a technology that uses a lot of math, science, and engineering to allow you to locate your device's positioning with phenomenol precision by calculating the difference between satellite positions and ground-based fixed positions.

Differential GPS

This is a series of technologies that enhance the accuracy with which GPS tracking devices determine their global position. In principle this simply involves a series of ground-based reference stations that correct for various sources of error in the Global Positioning System (GPS). When we talk about "pinpointing" the location of a mobile asset, we are usually discussing a location-finding system that implements differential GPS in one capacity or another.

Fleet Management Capabilities

Today's professional grade GPS fleet trackers do a lot more than just inform a fleet manager of the whereabouts of his or her crews in real time. Various commercially available software platforms offer a whole host of different features that make the GPS fleet tracking solution much more powerful and beneficial. Among these additional features are fleet management capabilities. Examples of this would include the ability to input information on the vehicles, like the make and model, information on insurance plans including expiration/renewal dates, and information on the drivers such as their driver's license info and even their pictures. Customers can often automate scheduled maintenance on their vehicles by receiving email reminders after the vehicle has been driven for 3k miles for example. Also, routing and advanced reporting features such as fleet hours worked and after-hours are additional fleet management capabilities found in high quality AVL solutions.


One of the greatest benefits of real time trackers is their ability to allow you to set up Geofences. These are virtual zones that you create on a customized map that, if violated by the tracking device, triggers an alert notification to be sent to specified e-mail or cell phone recipients.


This is the capability some GPS tracking mapping software programs give you to add geographical identifications such as pictures, videos, links, SMS messages and RSS feeds.

GPRS (General Packet Radio Service)

A prominent data service with which many active tracking GPS devices transmit informaton on cellular GSM networks. GPRS can be used in over 200 nations across the world.


Acronym for Global Positioning System. A technology that determines a GPS device's locaton based on interpreting satellite radio waves.

GPS Tracking Device

A GPS tracking device is generally a small-sized (handheld) data logger, which can be used to determine the tracker’s exact position within a few feet. GPS tracking systems are linked to a number of satellites orbiting the Earth acting as signal receivers and communicating the device’s position to a home station. Current GPS tracking systems available on the market also feature mapping software that enables the user to monitor the position of the tracked item or person either in real-time or as a historical trackback.

GPS tracking devices can be used for multiple purposes such as fleet or vehicle tracking, cargo and container tracking, asset tracking, personal tracking, law enforcement tracking and more. 

GPS Antenna

Because GPS devices must interpret the satellite signals in order to determine their global positioning, all GPS tracking devices need to have a GPS antenna. These antennas are usually built into the units themselves and can't be seen when looking at a fully constructed tracking model.

GPS Channels

The more GPS channels a tracking device has, the more satellites can follow the device. More satellites equals greater accuracy.


Different cell phone networks use different standards to exchange data. GSM is the most popular of these standards worldwide whereas CDMA (above) is only used in the U.S.

Hardwire Adapter

Depending on the specifics of a given tracking application, a hardwire adapter may be the most sensible way to keep your GPS tracking device operational. If you don't want to have to contend with recharging and/or replacing batteries, an often easy, affordable solution is to purchase a hardwire adapter which enables the GPS tracker to draw power from a vehicle or some other independent source of power.


When any web-based application is offered, it needs to be stored, maintained and monitored by technology professonals. This service is called "hosting."


Some GPS fleet trackers are expandable and feature an interface in the form of inputs and outputs. This permits fleet managers to connect multiple electrical systems to an active tracking device. This enables you to remotely monitor and control a number of vehicle systems such as when the airbag has been deployed, when the ignition is turned on/off, temperatures, and even to lock/unlock doors, just to name a few.


The interface of a GPS device is important when it comes to determining a given device's expandibility. Some GPS units have multiple inputs and outputs which permit a fleet manager or private owner to connect and remotely monitor and control anything from flood sensors to vibration detectors and vehicle systems.

IPX-7 Waterproof

As part of the standards established by the International Electrotechnical Commision (IEC), the IPX-7 is a standard by which electrical devices are compared against to measure their protection against the intrusion of water and liquids. If an electrical device is certified as "IPX-7 "it means that "ingress of water in harmful quantity shall not be possible when the enclosure is immersed in water under defined conditions of pressure and time (up to 1 m of submersion)."

LBS (Location Based Service)

An application that is accessed on mobile devices that provides the user with geographical information about a person, place or thing.


Most GPS devices require satellite line-of-sight in order to determine their location. While modest obstructions made of materials like glass or plastic are not usually an issue, heavier and denser materials like metal can and often are sources of trouble for location-finding ability of GPS devices. These types of issues can usually be remedied by relocating the placement of the GPS unit. If that fails there are special GPS devices that use Assisted GPS technologies to effectively get rid of this limitation.

Location Updates

In reality, real time GPS tracking devices provide the individual doing the fleet, asset or personal tracking with near real time positioning information. The more often an active GPS device broadcasts its location, the more "real" the real time locations you'll see on a screen are. Various tracking devices have different update refresh rates. Depending on the type of tracking operation, the battery life of the device, as well as some other factors, differet refresh rates are indicated for different tracking needs .


"GPS logger" is synonymous with "passive trackers." Their namesake is due to passive GPS tracking devices' ability to record critical traveling information in their onboard flash memory. They typically will use mapping software to record stop and start times and destinations, mileage info, and the speed with which a mobile vehicle or asset traveled. Because use of the Global Positioning System (GPS) is free and no cell phone networks are used, there are no activation or recurring monthly fees for those who purchase GPS loggers. To use this technology, interested consumers should determine if the area they would like to track a vehicle in has been mapped out. This isn't a problem unless you're traveling to an extremely sparsely populated, underdeveloped part of the world. Additionally, you should always make sure that you have good batteries installed at the beginning of a tracking session. One more thing to look out for is the capacity of the built-in flash memory. Most commercially available loggers store up to 100 hours worth of traveling information. Make sure to upload that data onto your computer if you plan on doing more tracking than the memory can handle.

Message Buffer

When a GPS device is unable to transmit positioning updates because of Dead Spots or inteference, those packets of digital information are normally lost. However, with a message buffer to log that data, as with the Quantum GPS fleet solutions, the data is stored on the device and when connection with cellular networks is re-established all the stored data is pushed forward so you don't lose any data.

Motion Sensor

Feature found on some trackers that usually works in tandem with special power saving modes that extend the operational life of battery-powered units.

MRM (Mobile Resource Management)

An MRM is a web-based system that uses mobile devices and wireless technology to help you monitor and manage your vehicles or other assets.

Panic Button/SOS Feature

A number of personal GPS trackers and messengers have a feature which is commonly referred to as a "panic button" or "SOS feature." What this normally does is it allows an individual in a very dangerous situation to notify either a centralized emergerncy response dispatch center or a set of pre-programmed contacts of the perilous circumstances the individual in question is encountering. All such devices will relay the individual's geographic coordinates, while others will permit one or even two-way communication.

Passive Tracking

Passive GPS devices log the tracking information of a mobile asset within its built-in memory, which can be retrieved and viewed at a later date. Typically, travel information such as route, stop time, speed, and direction are recorded. Though positioning information is not available in real-time, passive trackers still provide a wealth of important information for business owners as well as private individuals.


This refers to the software component of GPS active tracking solutions. When you sign up for monthly GPS tracking services, you are able to monitor your vehicles by logging into your account on a web-based mapping platform. You do not have to install any software for real-time GPS tracking systems that use a hosted platform

Quad Band

In order to use cell phone networks around the world a mobile device needs to be able to communicate using the correct frequency. Quad Band devices are compatible with the four most prevalent frequencies found on cellular networks worldwide.

Real Time Tracking

As opposed to passive tracking, real time tracking allows you to log in to a live mapping system to view where your vehicles or assets are right then and there, in real time.

Real time tracking refers to updated positioning information being delivered regularly to the user while the GPS tracking device is activated.  A real time tracking device has the ability to share its position every few seconds or minutes depending on its settings. It is thus a great tool to monitor the location of any equipped vehicle or asset in real-time and in a continuous manner (over several days, depending on the battery life of the product).  On the other hand, passive trackers store the location data during their activation time and the user needs to retrieve the data from the device itself, usually over a USB connection. Already used in countless applications in a huge number of professions and industries, Real time GPS tracking is a mature technology that is constantly being adopted by new practitioner for an ever increasing number of tracking operations.

SIM Card

The SIM card identifies a subscriber's networking device, i.e. cell phone or GPS tracker, on a given cellular data system. Some GPS devices require SIM cards in order for them to transmit data to the platform over the cell phone network.


Acronym for Short Message Service. SMS is the most commonly used technology for sending text messages to mobile devices. Most active trackers send their alert notifications using this data application.


Communication standard that permits very fast exhanges of data.

WAAS (form of DGPS)

A system comprised of satellites and ground stations that enhance the location-finding capability of GPS devices by correcting for various sources of error in the Global Positioning System. WAAS is best known for helping commercial airliners take off and land in lousy environmental conditions.


Communication protocol used to transfer data by some real time GPS trackers.

United States Military’s Mil-STD 810F

This is a broad range of environmental standards, such as shock, temperature and humidity, that the American military has established in order to help manufactures design and build various kinds of devices that will stand up to the multitude of harsh environmental challenges that the devices in question are expected to encounter during their service life. is committed to providing top-of-the-line GPS Tracking Solutions that are tailored to the needs of all of our clients. We specialize in Fleet Management, Asset Tracking, Employee Tracking, Personal Tracking for Children and the Elderly, Outdoor Tracking and GPS Tracking for Law Enforcement and Government. Whether you are a parent who is looking for the added security of a Child Locator or a government official in need of an Active GPS Tracking Device, JustGPSTracking has a solution for you.

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