Nowadays GPS (Global Positioning System) is a well known fact that has already become a norm of life for a great number of people. This system gives an ability to define the position and speed of the objects at any place on Earth, including polar territories, almost in all weather conditions, and in outer space to 100 kilometers above Earth. Global Positioning System was worked out and realized by the United States Department of Defense.

The principle of the position definition is in measuring the distance from the point with the fixed coordinates to an object. The sending satellite spreads radio signal to a GPS antenna and the delay time is counted to define the distance between the receiver and transmitter. It means that to detect 3-D coordinates GPS receiver must identify the distance to three transmitters and the time of the GPS system. And when we want to define coordinates and altitude of a receiver we are to use minimum 4 signals from 4 satellites. Orbital force supervision is implemented from the main control station that is situated in Schriever base, Colorado.

A great amount of usual persons as well as the police, sailors and rescuers use Global Positioning System for different needs, mostly for navigation, position and speed definition. If you need GPS devices you may get it almost everywhere nowadays. It is also built in the most computers, mobile telephones and onboarders. GPS receiver gives you a possibility to define geographical coordinates of the receiver's location at the present moment of time. The exactness of the position detection is from three to five meters and when radio signal is corrected from Earth it becomes higher and may be to one millimeter.

GPS software is also offered to customers. Such equipment gives you an opportunity to define your geographical location on the electronic navigation map.

There are 2 kinds of maps. Raster maps are related to the first kind of maps that are the simplest and the most available. Actually it is the picture of an area to which geographical coordinates are applied. The scale of such an electronic map depends on the primary variant of it. It can be both a photo from satellite and scanned geographical map.

But vector maps have their proper data system within them. They have all useful data about objects, their characteristics and location. For example the area information includes the rivers, lakes, hills and other objects that are located in this territory. These 2 types of maps contain the information about all the hotels, motels, restaurants and service stations in your place of location. So you can buy also portable GPS that will give you a convenience during the travel.

There are also some drawbacks that Global Positioning System has. The basic shortcoming is that GPS is radio-navigation equipment and due to it radio signal may not be received in some conditions. So if you are located in a reinforced concrete construction it is almost impossible to identify your location. But anyway it is the best system of defining your geographical coordinates for today.

Recent Entries

• The Greatest Offer of Internet Banking for People who are Concerned in it
• The Philosophy Of Development Of Great Gamblers
• There are many advantages in dating sites
• Tuscany draws guests
• The Article for People Who Wish to Have Escort Services in Ukraine
• The Topic for Persons who are Concerned in File Restoration Programs
• How To Utilize Info Recovery Programs More Efficiently
• The Best Offer of Online Gaming House for Genuine Gamers
• How To Increase The Effectiveness Of Business Meeting
• How To Arrange Your Trip To Ukraine More Properly

This entry was posted on Friday, June 20th, 2008 at 4:02 pm and is filed under Sciences .