Caching Now > GeoTech

		GPS Augmentation: Do you Need It? Part II In the previous issue of Caching Now, I discussed Differential GPS (DGPS) and the Wide Area Augmentation System (WAAS). This time, we look at the expansion of DGPS, another augmentation project by the FAA, plus initiatives to implement additional GPS augmentation systems—and even separate satellite navigation systems—around the world. Read more...

Past Articles

		GPS Augmentation: Do You Need It? Countries around the world are developing systems to increase the accuracy of satellite-based navigation systems. Part I of this two-part article discusses Differential GPS and the Wide Area Augmentation System. Read more...

		What is a "Mapping" GPS Receiver? First, this article assumes you have at least a passing knowledge of what the Global Positioning System (GPS) is, and what a GPS receiver (GPSr) can do. You don't need to know how it works, only what it can do--which, in a nutshell, is to tell you where you are on or above the earth's surface, with the help of the GPS satellites in earth orbit. I'll be talking about the handheld GPS receivers generally used for recreational purposes such as hiking, geocaching, biking, car navigation, bench mark hunting, and so forth. Read more...