A GPS tracker, geo-tracking device, or just tracker is an electronic navigation device usually attached to a vehicle, human/animal, or asset which uses the Global Positioning System (GPS) to map its precise position and determine its longitude to determine its geographical location. This device was first designed by the United States Department of Defense. In 2021 the European Union became the first regulatory body to adopt similar technology. The use of GPS tracker can be both civil and military in nature.
There are a number of tracker manufacturers. Power Source Inc., Garmin, TomTom, Magellan and Amber Alert is just a few of the global brands that manufacture GPS trackers. GPS tracker is powered by a rechargeable battery, power source, internal or external battery, solar panel and charging unit. The power source should be appropriate for the device. For example, a GPS tracker should not be expected to work with low energy solar panels.
A GPS tracker operates in two modes; real time and logbook. Real time mode helps to determine the exact location of the GPS tracker. The logbook mode stores data such as user names and passwords for the GPS trackers. A GPS car tracker has a built in voice Recognition system to automatically send information received from the cell phone to the central control center, if it is equipped with a microphone or a speaker. It also has a built in data backup system and a remote data retrieval system.
The principle of radio-based triangulation for receiving satellite
One of the GPS tracking uses the principle of radio-based triangulation where the receiving satellite is used to measure the time. This is done by sending a series of radio waves towards the GPS device. The received waves are then analyzed by the software. The data is then sent to the central control station. Another technique, which uses the principle of relativity and cosmology is called gravimetry where the position of the earth can be measured to find the positions of the heavenly bodies.
A GPS device uses the satellite device to receive signals from an orbiting satellite. The satellite devices are very precise and are capable of determining the location within a few feet of accuracy. A GPS tracker can measure the time and the date and these are sent to the central control. The timing of the signal received from the device and the distance it has covered determines the accuracy of the location report.
What do these trackers measures for ground relativity?
GPS trackers can also measure the velocity with which it moves relative to the ground and this is called orbit determination. This is very useful in many industries where equipment needs to move from one place to another frequently. The main advantage of using this method is that the speed of the equipment and the material it is made of does not matter. Thus, there is no need for maintenance and servicing of the equipment. This also enables the user to save on the cost incurred on fuel as the equipment need not be recharged every now and then. The users can thus save a lot on their operational and maintenance expenses.
The power source used for GPS trackers can either be battery or AC depending on the requirements of the device. However, most GPS trackers which are run by batteries require an external power source for them to function. There are certain types of GPS trackers that are powered with the help of AC power. These types have another disadvantage in that they cannot be used in case of power cuts. However, most GPS trackers which are run by batteries have a built-in protection system that automatically shuts down the unit if the main power source fails. One can simply buy the best GPS tracker devices from websites like amcrest.com.