The MLS (16-05-18)

Question 1

What are the advantages of MLS?

Answer 1

Less sensitive to siting error

Curved approaches possible

select glide path

well away from FM stations

Snow on aerial not a problem

200 channels available

Question 2

What is the principle of operation of an MLS?

Answer 2

Time reference scanning beam (TRSB)

The time between tones dictates that position of the A/C

Question 3

What is the frequency band of MLS?

Answer 3

SHF

Question 4

What is the emission classification of an MLS?

Answer 4

N0X G1D

Question 5

What are the 4 transmitters required for an MLS?

Answer 5

Azimuth - horiz

back azimuth or BAZ - horiz for departure

Approach/elevation - glideslope

Flare - close to touchdown.

Question 6

What is the scan rate of the azimuth transmitter of the MLS system?

Answer 6

approx 13.5 scans/s

Question 7

what is the scan rate of the approach/elevation transmitter of the MLS?

Answer 7

40.5 scans/s

Question 8

What kind of data can be sent via the MLS?

Answer 8

Station ident

System condition

Runway condition

Weather information