GCA-22ML
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- GCA-22ML
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.
The PSR/SSR transmitter and receiver are entirely composed of solid-state components. The modular transmitters offer "fail-progressive" redundancy: the failure of one module results in a partial degradation of performance. The PSR/SSR antenna system is equipped with a new asynchronous motor driven by a variable frequency drive.
The radar includes a PSR/SSR operator workstation and a PAR operator workstation, both equipped with air traffic status displays and radio control panels.
All air traffic status data is automatically recorded and can be read in both passive and interactive modes.
The GCA-22ML is powered by two independent power sources: the three-phase industrial grid (380 V, 50 Hz) and diesel generators. The GCA-22ML provides effective protection against pulsed interference and active jamming. The interference level is continuously monitored and displayed graphically for the operator. Protection against interference is ensured by extending the signal processor's dynamic range and its electronic frequency agility. Passive interference is eliminated through digital adaptive attenuation (MTI) and the generation of a noise 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 |
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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 |
|