P-14 (5N84 «OBORONA», 5N84A) RADAR MODERNIZATION

OVERVIEW
  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.

SPECIFICATIONS
PARAMETERVALUE BEFORE
MODERNIZATION
VALUE AFTER
MODERNIZATION
Range of working frequencies, MHz170-190160-200
Frequency agility:
  method for frequency agility;electromechanicalelectronic
  discreet steps;4 fixed frequencies200 kHz
  frequency setting accuracy.n/a±10 kHz
Types of transmitted probing pulses:
  short pulse;10 µs10 µs
phase shift keyed signals:
  13-bit13 10 µs
  28-88 bit(28 – 88) 10 µs
Transmitter pulse power700 kW30 kW
Capability of instant probing signal power
and structure changes
Not implementedImplemented
Detection range for a target with RCS of 2.5m2, Р=0.5:
  min range-2,7 km
  at altitude of Н=100 m30 km37 km
  at altitude of Н=500 m85 km105 km
  at altitude of Н=1000 m110 km130 km
  at altitude of Н=3000 m185 km220 km
  at altitude of Н=10000 m290 km340 km
Detection accuracy:
  range1000 m270 m
  azimuth0.800.40
Resolution:
  range3500 m1600 m
  azimuth8080
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 time8 min3 min
Power consumption60 kWup to 40 kW
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