New technologies are introduced into the market every day, and some of the most advanced items available today are Global Positioning System (GPS) receivers. The GPS helps people locate their precise positions on the globe, find other points of interest, and get directions between locations. Many manufacturers have begun building and offering receivers, but one of the clear standouts is the discount Garmin nuvi 760 GPS receiver.

The GPS consists of satellites and receivers. The 24 satellites send signals to the receivers on the ground, which calculate their own locations (with an average accuracy of within 15 meters). To plot a two-dimensional location (latitude and longitude), the receiver needs to be able to read signals from three satellites. With the information from four or more satellites, a three-dimensional location can be determined.

The 24 satellites that make up the GPS were originally placed into orbit by the United States government to provide information supporting military operations around the globe. The government opened the system to civilian use (without cost) in the 1980s. Today companies sell a wide variety of GPS receivers that provide navigation. Many models, such as the discount Garmin nuvi 760 GPS, perform many other functions as well.

The satellites that make up the GPS make a complete orbit around the earth twice each day. Each travels a path that has been carefully plotted to enable the system to provide complete global coverage. While they travel, they send signals to the ground. The signals travel via a line of sight. This means that they can pass through things like glass and clouds, but not through solid objects like mountains or buildings.

The signals sent by the satellites are constantly being read by the receivers on the ground. The receivers compare the precise time they receive each satellite’s signal to the time the signal left the satellite. This tells the receiver how far it is from the satellite. Using this information and the signals from other satellites, the receiver is able to determine its precise position on the globe.

Once the receiver and satellites have determined the location of the receiver, they can work together to make other calculations that are helpful to the user. These calculations can include speed, time to destination, bearing, distance to destination, and more. The discount Garmin nuvi 760 GPS includes these functions and more.

The 24 satellites in the GPS transmit signals 24 hours a day around the world, in weather ranging from clear sunny days to rainy or snowy nights. They operate on solar power and battery backups as they travel their orbits approximately 12,000 miles above the ground. The satellites are kept on track by small booster rockets attached to their exteriors.

There are, however, times when a satellite’s signal is not as strong as it could be, making it difficult for the receiver to complete its calculations. One situation in which the signal can be degraded is when it is diverted off of a mountainside or a building. In this case, the signal’s travel time to the receiver is affected, which negatively affect the distance calculations. Another situation that can be challenging is when the atomic clocks on the satellites and the less precise clock on the GPS receiver are not in synch. This can also affect the calculations the receiver performs.

The discount Garmin nuvi 760 GPS unit includes twelve channels that can read multiple satellite signals at the same time. This makes the unit highly accurate in pinpointing the user’s location. The twelve channels also make it more likely that the receiver can retain signals in difficult environments like forests or cities with tall buildings.

GPS technology is certain to retain its popularity, and perhaps even to gain more popularity in the coming years. As the technology continues to evolve, GPS units will become more advanced as well, and new uses for it will be found. Stay tuned to see what happens next.