All You Need To Know About GPS & GPS Devices

The worldwide Global Positioning System (GPS) network is becoming more and more popular each day. Known as a useful tool for mapmaking, land surveying, commerce, and scientific uses, GPS is now a widely used navigation aid world wide.

The Global Positioning System (GPS) is the fully functional Global Navigational Satellite System which will help in determining the location, speed/direction and time with the assistance of 24 medium earth orbit satellites. The GPS network consists of 24 navigation satellites, which orbit the planet at a height of approximately 12,000 miles. These satellites each orbit the earth twice every 24 hours, and they are set up in such a way that they can send signals to any location on the planet, whether it be land or sea, and no matter how remote.

The current GPS is divided into three major segments called space segment (SS), control segment (CS), and user segment (US).It is the navigation message broadcasted by GPS satellites that provides the time-of-day, GPS week number and satellite health information.

How Does GPS Work?

The software once created, gets improved by getting smaller. GPS device requires a radio emitter and a clock to work. The emitter sends the time of the clock to the satellite overhead. The satellite then calculates the amount of time it took for the radio signal to reach them and then figures the distance from that. Three or four satellites compare their location and the time involved. They then show the location within about six inches depending on the accuracy of the unit's clock. While the GPS technology does not really need a lot of space, the software that adds the functionalities expected by the consumer, actually does.

Uses Of GPS

In the advanced modern world, GPS is mainly used in various daily life equipments including mobile phones and more popularly in cars. The military uses GPS technology to guide missiles, track and control forces and facilities, and more. Many newer vehicle models come with a GPS feature, which can be used to get customized maps and directions from your current location, to a specified location. Just like automobiles, many boats and ships use GPS for navigation. On top of that, GPS may be especially helpful during darkness, fog, or other low visibility conditions. Hunters, wilderness explorers, and other outdoor sportsmen may use GPS for navigation purposes, and / or to help find their way when lost. Many surveyors use GPS units to survey and establish boundaries and other locations or markers. And for those who loves fishing, with a GPS unit you can just plot the points and you will have that spot marked on your GPS so that you can go back to the same spot or just go find another good spot and mark that down on the GPS. Or perhaps if you are in your boat and you are lost you should have a plot that says home so that you can just activate home and it will send you in that direction. The list of the benefits and importance of GPS in our daily life grows as we speak.

Portable GPS Tracking Systems - How to Choose the Best

Portable GPS systems have come a long way in recent years. Today, you can have a GPS system that you can take with you everywhere you go. No longer is the GPS only mounted to the dash of your car. Now you can hold a portable GPS navigation system in your hand as you travel just about anywhere. However, these units represent a sizeable investment, anywhere between $200 and $1,500. Before you put down the money for one of these systems, do a little research to make sure that you are getting the best possible system for the price.

First, the more affordable the GPS unit is, the smaller the memory capacity will be. Some of the cheapest units will need to have maps loaded on to them via memory cards. On the other hand, the pricier units will have maps already loaded into their built-in memory systems. If you want a portable GPS navigation system that has pre-loaded maps, be prepared to pay more than $500.

Another consideration to make when purchasing portable GPS systems is the size of the screen. You can find screen sizes in a range between 2.1 inches and 7 inches. The size of screen that you need depends on what the intended use of the portable global positioning system is going to be. If you wish to have a unit that doubles as a portable car GPS system, then you will need a larger screen. However, if you simply need to have a system that you can take with you anywhere and not use in the car, a smaller screen will work. If you are looking for something that falls in the middle of the screen size range, consider the RoadMate 6000t portable GPS system. This system has a 3.5 inch screen with anti-glare properties, which works well as a handheld device and a car mounted device, making it an ideal portable automotive navigation system. The Pharos GPS 135 portable GPS system is another that has a 3.5 inch screen. The Garmin StreetPilot 2720 portable color GPS navigation system is a slightly larger option with a 3.8-inch screen. If you need the largest possible screen, consider the Garmin StreetPilot 7200 model, which has a 7-inch screen.

Another consideration to make when shopping for portable global positioning systems is the menu on the system. Make sure that the menu is as user friendly as possible, particularly if you intend to use the unit while driving. You may compare the best portable global positioning systems and find that one has a menu screen that is difficult for you to use.

Once you have decided on a couple of units in mind that you think will be good for your needs, visit a GPS store near you to actually handle the units. While the best portable global positioning system discounts are going to be found online, handling the unit at a store will help you solidify your decision. Even with the best portable GPS navigation system bargains, if you are not happy with the unit, the savings you got on the price will be worthless. Remember, portable GPS systems represent a sizeable monetary investment, so make sure you like the unit you have chosen and are comfortable using it before you make the purchase.