The Best Way to Have GPS Navigator

June 20th, 2008

Global Positioning System is a really popular navigation system that is used by a great amount of people nowadays. The aim of the arrangement is the detecting of the velocity and situation of the objects. It may detect the object at any area on Earth, even in polar areas and in outer space to one hundred kilometers above Earth in any weather conditions. The United States Department of Defense has worked out and realized NAVSTAR GPS.

The main principle of work is definition of the position by the means of measuring the distance to an object from the point with definite coordinates. The distance is detected by the calculating the delay time of the signal spreading from the satellite-transmitter to a GPS antenna which is a receiver. You may see that GPS receiver has to know the distance to 3 satellites and the time of the GPS system to identify 3-dimensional coordinates. And when we need to detect coordinates and altitude of GPS receiver we have to apply minimum 4 radio signals from 4 satellites. Schriever base, Colorado is the direction station that realizes the orbital force supervision from Earth.

A great amount of civil persons as well as the police, sailors and rescuers apply GPS systems for different purposes, mostly for navigation, position and speed definition. GPS systems are being sold in different stores and they are built in mobile phones, PCs and onboarders. GPS receiver allows a consumer to define geographical coordinates of the receiver's location at the present moment. The exactness of the detection of the signal location is from 3 to 5 meters and it is really heightened with the correction signal from Earth and the calculating mistake is 1 millimeter.

Also a lot of internet sites offer GPS software to purchase. This arrangement helps a consumer define his position that is shown on the electronic navigation map.

GPS maps are divided into two types. The first kind is raster electronic maps, the simplest and the most open ones. It is the picture of a country where the position if the receiver is used. The initial variant of such a map will define its scale. It can be either a photo from space or scanned version of a usual geographical map.

And vector electronic maps are created with their proper data system within that makes them really helpful. The data system includes the information about objects, territory and mostly everything you need to know. There may be various types of the country information, like the rivers, mountains etc. And of course, both raster and vector Global Positioning System maps will inform you about the motels, cafes and restaurants, service stations in this place. So you can get also portable GPS that will bring you a comfort during the trip.

But we are to tell you some words about the shortcomings of this product. The basic shortcoming is that GPS is radio-navigation arrangement and owing to it radio signal would not be received in some conditions. A user will be practically invisible for GPS signal in reinforced concrete buildings. But anyway it is the greatest system of detecting your location for today.

Entry Filed under: Progress & Technology