The Mighty GPS: Host to the World
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The world of evolving technology has brought us some wonderful little gadgets to make daily life a little more efficient, timely and exciting. We have the internet to thank for quick, real time responses and updates for everything from global news to local sales at the mall!
There have been many amazing spin offs that use internet technology in a sophisticated application that brings the world to our fingertips. However, nothing zooms in on the entire planet like the mighty GPS!
GPS, or global positioning systems, allow the images and information on global satellites to transform old fashioned road maps for the computer savvy world. Using satellite technology, a GPS can isolate a specific location or address and relay the coordinates in mere milliseconds to computers, phones or navigation systems. Coordinates can be entered using latitude and longitude, but most people prefer to simply use a street address or even an intersection.
GPS devices receive information from up to 12 satellites that are in orbit at any given time. The global positioning systems are receivers, not transmitters of signals from these satellites. The accuracy of such information varies depending on the type of receiver in use.
Marketplace GPS devices such as those found in the consumer sector for hand held components, have an accuracy of about a 10 to 20 meter range (30 to 65 feet). That’s not a bad margin for error, considering the signal comes from miles above the earth. However, there are also more sophisticated and accurate differential GPS devices.
DGPS was initially only utilized by large commercial applications, such as auto manufacturers or in military applications. Differential GPS navigation uses base stations already on the ground to help correct the accuracy of satellite signals. However, since the inception and popularity of GPS has grown in the past decade, more consumer products are making use of DGPS for a better user experience.
Since the signals are coming from satellites, GPS navigation systems work best under clear, blue skies. Sometimes weather can interfere with the signal, which may not prevent the signal from being submitted, but it could impact the accuracy a bit. More severe weather conditions, such as tornadoes or hurricanes can easily render the receiver unusable due to the disruption of the airwaves carrying the GPS signal.
Deep caverns and dense forests also interfere with the GPS’s ability to receive an accurate satellite signal, so if you’re going camping, you may wish to bring along a compass too! However, lakes, large rivers and the sailing seas often provide a high quality reception plane for GPS navigation.
Indoors or in vehicles, the GPS navigation works amazingly well. Most buildings have windows or doorways which allow a break in the steel and concrete and permits the signal to find a route to the receiver. So unless you find yourself lost in a deep, dark dungeon, miles below the earth, the GPS navigation should help you find your way home.
admin | 
February 17, 2012 4:37 am
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