GCA-22ML
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Upgraded Ground-Controlled Approach system GCA-22ML is designed to ensure flight safety of aircraft and helicopters within terminal airspace, obtain positional information and guide aircraft to a safe landing in normal and adverse weather conditions. GCA-22ML combines primary and secondary radars, and Precision Approach Radar (PAR).
Primary channel of GCA-22ML operates in L-band (ICAO), secondary channel uses standard frequencies for RBS (interrogation – 1030 MHz, response – 1090 MHz) and Eastern UVD (interrogation – 1030 MHz, response – 740 MHz). Primary and secondary channels work on a common antenna. Precision Approach Radar performs vertical and glide path guidance and operates in X-band.
Transmitter and receiver of PSR/SSR feature solid-state components only. Transmitters have modular design and provide 'soft-failure' redundancy: failure of individual module leads to partial performance degradation. Antenna system of PSR/SSR is equipped with a new asynchronous motor drive assembly controlled by frequency inverter.
Radar includes PSR/SSR operator workstation and PAR operator workstation equipped with air situation displays and radio control panels.
All air situation is automatically recorded with playback capability in passive and interactive modes.
GCA-22ML is powered from two independent power supplies: from three-phase industrial mains (380V, 50 Hz) and from diesel power generators. GCA-22ML features efficient protection against pulse interference and active jamming. Level of interference is continuously monitored and graphically represented to the operator. Jamming protection is achieved through expansion of the dynamic range of the signal processor and capability of electronic frequency agility. Passive interference is rejected through digital adaptive MTI and generation of clutter map.
|
Parameter |
PSR |
SSR |
|
Range of working frequencies |
1250 – 1350 MHz, |
1030 MHz – interrogation, |
|
Frequency agility: |
|
|
|
electronic |
- |
|
800 kHz |
- |
|
Supported modes |
- |
RBS, UVD and Mk XA |
|
Types of transmitted probing pulses: |
|
Modes A and C |
|
1.5 µs |
|
|
|
|
|
13-bit; |
19.5 µs |
tT=0.8 µs |
|
42 bit. |
63 µs |
tT=0.45 µs |
|
Transmitter pulse power |
2.5 kW |
1 kW |
|
Detection range for a target with RCS of 2.5m2, Р=0.5: |
|
|
|
1000 m |
2.7 km |
|
110 km |
150 km |
|
Detection accuracy: |
|
|
|
150 m |
200 m |
|
0.4° |
0.2° |
|
Resolution: |
|
|
|
230 m |
150 m |
|
5° |
4° |
|
Scanning period |
5 s |
5 s |
|
Range of adaptive MTI |
0 - 160 km |
|
|
Clutter suppression ratio |
> 35 dB |
|
|
Dynamic range of receiver and digital signal processor |
> 100 dB |
|
|
Start-up time |
3 min |
3 min |
|
Power consumption |
6 kw |
6 kw |
|
Track capacity |
Not less than 100 |
Not less than 100 |
|
Parameter |
Azimuth |
Elevation |
|
|
Range of working frequencies |
9410±30 MHz (X-band) |
||
|
Coverage area: |
|
|
|
|
from -15° to +15° |
from -15° to +15° |
|
|
25 km |
25 km |
|
|
from -3° to 8° |
from -1° to 8° |
|
|
Accuracy: |
|
|
|
|
20 m |
20 m |
|
|
0.030 |
|
|
|
|
0.030 |
|
|
Resolution: |
|
||
|
80 m |
80 m |
|
|
0.80 |
|
|
|
|
0.80 |
|
|
Nominal output pulse power, not less than |
20 kW |
20 kW |
|
|
Track capacity, not less than |
20 |
20 |
|