Modernization of early-warning VHF radar 5N84A
(5N84, 44Zh6 or P-14) offers the best (in terms of
efficiency/cost ratio) alternative to restoration or repair
of legacy prototypes.
As a result of modernization the radar’s detection performance is efficiently improved. Modernized radar features automatic tracking capability as well as data receiving from other radar sensors. Data can be exchanged over a variety of communication channels.
DEPTH OF MODERNIZATION:
Radar’s equipment cabin has been fully modernized.
Metric band is preserved, however the number
of working frequencies has been sufficiently
increased from 4 to 200, the capability of instantaneous
electronic frequency agility has been added
as well. The radar transmitter and receiver feature
solid-state components only. Transmitter has a
modular design which provides ‘soft-failure’ redundancy: failure of individual module leads to partial performance degradation.
Antenna-mast assembly is equipped with the new asynchronous motor drives controlled by frequency inverters.
Modernized 5N84AMA radar remains a two-dimensional system and it is used to find azimuth and range.
Altitude can be obtained by interfacing modernized height-finding radars. Parameters of the transmitted signal as well as parameters of the signal processing after reception can be set at the operator workstation, while secondary processing and tracking are performed at remote workstation. Both workstations are installed in the equipment cabin.
As an option, ground interrogator can be controlled in auto- and semiautomatic modes with assigning aircraft state identification status. All air situation is automatically recorded with playback capability in passive and interactive modes.
Modernized 5N84AMA radar features efficient protection against pulse interference and active jamming. Level of interference is continuously monitored and graphically represented to 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.
Equipment of 5N84AMA can be installed on a semitrailer or in two standard sea containers mounted stationary or on a vehicle.
MODERNIZATION OF 5N84A FEATURES:
- metric band for «counter-Stealth» capability;
- maximum use of COTS components;
- option of containerized solution (two 20ft ISO);
- stable, fail-soft, modular solid-state transmitter;
- built-in test equipment;
- no special adjustments required during operation;
- largely simplified maintenance;
- engineered for minimum cost of ownershipt.
|Range of working frequencies, MHz||170-190||160-200|
|method for frequency agility;||electromechanical||electronic|
|discreet steps;||4 fixed frequencies||200 kHz|
|frequency setting accuracy.||n/a||±10 kHz|
|Types of transmitted probing pulses:|
|short pulse;||10 µs||10 µs|
|phase shift keyed signals:|
|13-bit||13 10 µs|
|28-88 bit||(28 – 88) 10 µs|
|Transmitter pulse power||700 kW||30 kW|
|Capability of instant probing signal power
and structure changes
|Detection range for a target with RCS of 2.5m2, Р=0.5:|
|min range||-||2,7 km|
|at altitude of Н=100 m||30 km||37 km|
|at altitude of Н=500 m||85 km||105 km|
|at altitude of Н=1000 m||110 km||130 km|
|at altitude of Н=3000 m||185 km||220 km|
|at altitude of Н=10000 m||290 km||340 km|
|range||1000 m||270 m|
|range||3500 m||1600 m|
|Range of adaptive MTI||-||0-500 km|
|Clutter suppression ratio||-||> 40 dB|
|Dynamic range of receiver and digital signal processor||-||> 100 dB|
|Automatic control of modernized height-finders||-||Implemented|
|Number of controlled height-finders||-||up to 4|
|Start-up time||8 min||3 min|
|Power consumption||60 kW||up to 40 kW|