1
Q
Describe MLS frequencies?
A
- 200 channels
- 5031 MHz to 5090.7 MHz
- Paired with an associated DME
2
Q
Describe the azimuth and elevation beam?
A
Both have a range of 20 nm and are fan shaped
Azimuth 40° either side of the centre line
Elevation 0.9° to 7.5°, but most in service installations go to 15°
3
Q
What allows an aircraft to fly cockpit selectable offset or curved approaches?
A
The approach azimuth, elevation and distance information will enable an aircraft to derive its position in space with great precision
4
Q
What are the additional elements that might be included in an expanded configuration of MLS?
A
- Back azimuth equipment to support the missed approach procedure
- Flare elevation equipment to support autoland functions
- Extended azimuth coverage over 360°
5
Q
What is the accuracy of MLS at the threshold?
A
± 20 feet in azimuth and ± 2 feet in elevation
6
Q
What are the advantages of MLS over ILS?
A
- Increased traffic handling
- Freedom from radio interference
- Can be installed at difficult sites where ILS could not
- Economical to maintain
- Very wide 3D coverage for curved flight paths, different glide slopes for final approaches
- More flexibility in control of aircraft in terminal areas
