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intermittent failure or degradation.
Loss or corruption of data,
missing or incorrect input or
output (Ex: Ref: Safety policy and
implementation, ESARR)
3. Use of SSR for
Terminal and
Approach Services
1)
2)
State the key parameters of an
approach SSR radar
Describe, in terms of exposure
time, environment, the effect on
controller and pilot, relative to the
types of functional failures
1
2
Tx power, receiver MDS, rotation
speed, PRF, interface, electronic
scanning
Total or partial failure. Premature
or delayed operation
implementation. Spurious and
intermittent failure or degradation.
Loss or corruption of data,
missing or incorrect input or
output (Ex: Ref: Safety policy and
implementation, ESARR)
4. Antenna (SSR) 1) Describe the principle of
SSR/MSSR antenna
2 Active antenna, monopulse
antenna, LVA, waveguide,
phasing – monopulse antenna,
sum, difference and control
pattern. Error angle
measurement, beam sharpening
Advance first edition (unedited) version – 30 August 2009
88
Topic Intermediate Objectives
The students should be able to:
Level Content
5. Data Transmission 1) State that primary radar and 1 See PSR data transmissions for
(SSR) secondary radar data details (this objective requires that
transmissions are using the same PSR transmission objective has
techniques been covered)
2) Describe data message output 2 Type, range, Azimuth, A and C
from secondary equipment codes (12 bit), emergency,
validation, garble
3) Describe the requirements of 2 Latency, redundancy, quality,
radar data transmission error detection
4) Describe the implementation
options
2 Point to point network
5) Decode all the details of an 3 Call sign, range, azimuth, altitude,
ASTERIX message time, SPI and emergency etc.
6. Interrogator 1) Describe the characteristics of an 2 Frequency, spectrum,
interrogator interrogation modes, duty cycle,
SLS, IISLS, rotational interlock
2) Draw and explain a generic
interrogator block diagram
2 Timing, interface, modulator, BITE
3) Explain the need for integrity 2 Safeguards against erroneous
monitoring transmission, BITE
7. Transponder 1) Explain the operational use of the 2 Diagram of interaction between
transponder transponder and aeroplane
2) Define the global performances 1 Range, accuracy, fixed delay to
respond
3) Describe the basic characteristics 2 Dual electronics, aerial
of a transponder location/switching and polar
diagram, size, ACAS MODE-S
compatibility, maximum replay
rate, ISLS
4) Explain the advantages of the
transponder
2 Longer range, more information
5) Explain the limitations of the 2 100’s of feet precision, 3A limited
transponder codes, squawk switch
6) Describe the HMI presented to the 2 Mode 3A switch settings, special
pilot position indicator (SPI)
7) Check the conformity to national 3 National regulations
regulations corresponding to the ICAO
Annex 10
8) Describe the data format of the
received transponder messages
2 P1, P2, P3 signals
9) Describe the data format of the 2 Field lengths, data bits, grey code,
transmitted transponder messages unused bits
10) Decode a transponder message 3 Standard message with SPI set
11) Describe the basic characteristics 2 Timing, modulation, pulse width,
of a transmitter power output, ISLS, IISLS
8. Receiver 1) Describe the basic characteristic 2 Standard receiver/MMSR
of a SSR-receiver receiver, sensibility, bandwidth,
dynamic range, STC (normal,
sectorized), amplitude processor,
phase processor, RSLS, multipath
and interferences
Advance first edition (unedited) version – 30 August 2009
89
Topic Intermediate Objectives
The students should be able to:
Level Content
9. Extraction 1)
2)
Describe monopulse extraction
Describe sliding window SSR
extraction
2
2
Phase and amplitude modulation,
off boresight angle calculation,
azimuth encoding
Leading edge, trailing edge,
azimuth accuracy, azimuth
encoding
10. Signal Processing 1) Describe the signal processing 2 Video-digitizer, pulse processor,
reply decoder (bracket pair
detector) synchronous replay
correlator
11. Surveillance
Processing for
Replay
Verification
1) Describe the SSR processing
techniques
2 Discrete code correlation, general
association, zones, categories,
code swapping, general
correlation mode A code data,
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Air Traffic Safety Electronics Personnel (ATSEP)(45)
