Best Information on GPS
How GPS Can Be Used
Using the common cellular phone network, GPS is now widely used in tracking the location of all kinds of vehicle. The automatic vehicle tracking system is a combination of GPS and Geographical Information System (GIS) that enables users both at personal as well as corporate level in tracking vehicle. The tracking devices attached in motor vehicle automatically update about location, speed, distance etc. Hence, time-by-time notification helps in fixing schedules thereby offering better fleet management.
Factors responsible for GPS signal errors
The GPS receiver requires the current time, the orbital position of the satellite and a measurement of signal delay. Calculating accurate co-ordinates of an object primarily depends on three data. To measure the signal delay, the receiver prepares an identical sequence of the Coarse-acquisition (C/A) code and compares it with the sequence received from the satellite. The changes in bit transition can be calculated an approx. of 10 nanoseconds for the code. As the signal travels at a speed equal to the light, the net error can be taken as 3 meters.
GPS in Geocaching Games
Geocaching is an outdoor treasure haunting game that requires GPS receivers in order to find out a cache. Geocachers search an undercover treasure by using the co-ordinates of the cache through Internet and then go for finding out the hideout place of the cache.
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