how many satellites are needed for 2D position
3 needed for 2D position
how many satellites are needed for 3D position
4 needed for 3D position
how many satellites are need for RAIM
5 satellites needed for the RAIM
How many satellites needed to enable the Fault detect and elimination capability
6 satellites to enable Fault Detect and Elimination Capability
What is WAAS
WAAS is wide area augmentation system
What does WAAS provide
Corrects for GPS signal errors using timing and satellite orbit errors