for those who really want to know, look at:
http://en.wikipedia.org/wiki/Error_analysis_for_the_Global_Positioning_System
There are a lot of 'urban myths' around the GPS, make sure your information is
verified.
Leslie.
I did not study it, but have friends who use GPS to sub-centimeter
not quite any more, the SA has been turned off for many years. It does not
mean it can not be turned back on...
The average GPS receiver uses the C/A code only. Better accuracy (10x) comes
from the P code but it is encrypted The military knows the W code,not the
general public. However,
On the civilian GPS precision capabilities.
Not to overkill the subject but I use a GPS based telemetry system for lap
times and analysis in my track car. The system uses WAAS, 10 HZ refresh
rate, and superimposes Google maps pictures of the track with the GPS
calculated car trajectory.
