What is the purpose of an Advanced Surface Movement Guidance and Control System (A-SMGCS) at high-capacity airports?

1. To provide routing, guidance, and surveillance for aircraft and vehicles on the airport surface under all weather conditions.
2. To calculate the optimal descent profile for arriving aircraft 100 NM out.
3. To monitor the structural integrity of the runway concrete surface.
4. To automatically guide aircraft from the terminal gate onto the active runway without pilot input.