Global Positioning Satellite












The Global Positioning Satellite system (GPS) was established by the US Department of Defense with the aim of providing real time navigation updates for the military. It was intended for nationwide and all weather use. However, it has grown to enable position determination to all kinds of users in different fields. The GPS system uses satellite images to broadcast current location and time. The satellite receivers listen to several satellites and from such broadcasts; they are able to determine where the receivers are located and what time it is.

In addition to broadcasting specific messages unique to each satellite and receiver, more data is also added to the signals. The data includes precise current time that is rounded off to the nearest second. This information is essential in computing the specific real time position of the satellite. The Global Positioning Satellite system is a navigation system based on navigation. The system uses digital signals to relay data to the receiver. The receiver then deduces the exact range from the satellites to determine geographic location. The following diagram shows the satellite sends data to the receiver to determine precise time and position.



At times, a second line of position is needed so as to determine two possible locations of the receiver. The following diagram shows how this is done.

The third line of position will resolve this to provide a single location and time on the Earth. The range from various satellite images is determined by factors such as the time the signal was received. The messages relayed from the satellite also include the time the image was sent. This time is compared to the time on the receiver clock to determine the range. A fourth satellite is used to resolve any errors in time that might occur. For the Global Positioning Satellite system to work there should be at least four satellites that are visible to the receivers at all times. There are approximately 21 operational satellites that circle the earth’s orbit every 24 hours.

Experts have argued that Global Positioning Satellite system in cars is a potential distraction. According to safety experts, distracted driving is a common cause for various transportation accidents. It is important that drivers use the GPS in their cars wisely and keenly follow the basic rules. When using GPS, individuals know where they are going, trying to see road signs to determine where one is causing distraction in driving. However, with the use of GPS, one is rarely lost. Even when one misses a turn, the Global Positioning Satellite system automatically recalculates the route.

This reduces stress and distraction for the driver. Installing GPS in one’s car means that one does not have to deal with physical or electronic maps. It is challenging and potentially dangerous to handle maps while driving. This is also a significant distraction. It is also not easier even when there is a passenger trying to read the map and provide directions. GPS also improves safe driving at night. This is one of the best features in in-car Global Positioning Satellite system. GPS gives drivers better control at night and also in low-visibility conditions. GPS also have safety features such as help buttons, hands-free calling that show the driver to the nearest hospital, police station and garage.

The Global Positioning Satellite system is also used in other fields such as transport and business industries. The GPS technology has significantly improved the overall effectiveness of operations in trucking companies. This technological innovation has provided business multiple benefits to the business. Such advantages include more efficient and faster transportation processes, better time management and greater security of the cargo in transit. Consequently, many trucking businesses have implemented Global Positioning Satellite system into their operations. GPS technology has become an integral part of transportation logistics due to its involvement in the facilitation of more efficient transportation solutions. Business owners of commercial freight transportation services install GPS devices onto trucks so as to allow for fleet tracking. The use of GPS  has various benefits, and it improves the overall ability of transportation companies to be more reliable and responsive in their operations.

There are multiple ways that the law enforcement personnel can use the Global Positioning Satellite system to improve security. Many security stakeholders have implemented the use of GPS to enhance surveillance. Using GPS for vehicle tracking has enabled law enforcement personnel have access to real-time locations ad time of potential criminals and this has helped them operate more efficiently. This technological advancement has however resulted in privacy concerns. This happens when security personnel do not conduct their due diligence when using information from tracking devices. GPS is not only used to track police cars but also as a weapon in fighting crime. Police fix GPS trackers in vehicles of suspects so as to monitor their movements. GPS have impacted security systems in that they allow for long-term surveillance that is normally not possible without being detected. GPS devices are also used to monitor suspicious cargo with the aim of providing valuable evidence to be used by the prosecution.






Leick, A. (2004). GPS satellite surveying (3rd ed.). Hoboken, NJ: John Wiley.

Parkinson, B. (1996). The global positioning system theory and applications. Volume I.             Washington, D.C.: American Institute of Aeronautics and Astronautics.

Parkinson, B. (1996). The global positioning system theory and applications. Volume I. Washington, D.C.: American Institute of Aeronautics and Astronautics.