03 Radio Altimeter Flashcards
1
Q
What does a Radio Altimeter measure?
A
Absolute Height
2
Q
What is the principle of operation of the Radio Altimeter?
A
- Time based system
- Uses continuous wave variable frequency signals
- Measures the time between different frequency signals reflecting off the ground to the AC to give the distance to the ground
3
Q
What frequency range does the Radio Altimeter operate in?
A
4300 MHz +- 50 MHz
4250 MHz to 4350 MHz
4
Q
When does the Radio Altimeter show 0?
A
When the first set of wheels touches the RW
5
Q
What is the principle of height measurement used by the Radio Altimeter?
A
It uses a continuos wave transmission, with separate antennae for transmission and reception
6
Q
What is the range and accuracy of a Radio Altimeter?
A
- 2500 ft
- Accuracy of +- 1.5% and 2ft below 500ft
