01-11-2010, 02:50 PM
Seminar on GPS.ppt (Size: 456.5 KB / Downloads: 360)
Working of GPS/DGPS
Why do we need GPS?
Trying to figure out where you are is probable man’s oldest pastime.
Finally US Dept of Defense decided to form a worldwide positioning system.
Also known as NAVSTAR ( Navigation Satellite Timing and Ranging Global positioning system) provides instantaneous position, velocity and time information.
Control Segment:
The control segment comprises of 5 stations.
They measure the distances of the overhead satellites every 1.5 seconds and send the corrected data to Master control.
Here the satellite orbit, clock performance and health of the satellite are determined and determines whether repositioning is required.
This information is sent to the three uplink stations