Upgrade of early-warning VHF radar P-14 (1RL113 "Lena", 44Zh6 "Furgon", 5N84A "Oborona-14", "Tall King") offers the best (in terms of efficiency / cost ratio) alternative to restoration or repair of legacy prototypes.
As a result of upgrade the radar's detection performance is efficiently improved. P-14ML features automatic tracking capability as well as data receiving from other surveillance radars and height-finders. Data can be exchanged over provided communication channels in approved format.
Detailed information
Depth of upgrade of P-14

The radar equipment cabin is fully upgraded. Metric band is preserved, however the number of working frequencies is increased from 4 to 200, the capability of instantaneous electronic frequency agility is added. Radar transmitter and receiver feature solid-state components only. The transmitter has a modular design and provides “soft-failure” redundancy: failure of individual module leads only to partial reduction in power.

Antenna-mast assembly is equipped with new asynchronous motors controlled by variable-frequency drives.

P-14ML remains a two-dimensional system and is used to find azimuth and range. Altitude can be obtained by interfacing upgraded height-finding radars, in this case radar and height-finders operate as a 3D radar complex. Parameters of transmitted signal as well as parameters of signal processing after reception can be set at the operator workstation, secondary processing and tracking are performed at the remote workstation. Both workstations are installed in the equipment cabin in standard configuration.

As an option, ground interrogator can be controlled from the radar with the assignment of aircraft state identification status.

All air situation is automatically recorded with playback capability in passive and interactive modes.

P-14ML radar features efficient protection against pulse interference and active jamming. The operator workstation graphically presents noise to the operator allowing for visual assessment of jamming and interference at given frequency and bearing of a jammer. Jamming protection is achieved through expansion of the dynamic range of the signal processor and capability of quick electronic frequency shifting. Passive interference is rejected through digital adaptive MTI and generation of clutter map.

Equipment of P-14ML can be installed on a semitrailer or in two standard sea containers mounted on concrete base or on a vehicle.

Performance characteristics of P-14ML

Before upgrade

After upgrade

Range of working frequencies

170-190 MHz

160-200 MHz

Frequency agility:



  • method for frequency agility



  • discreet steps

4 fixed frequencies

200 kHz

  • frequency setting accuracy


10 kHz

Types of transmitted probing pulses:



  • short pulse

10 µs

10 µs

  • phase shift keyed signals:





13 × 10 µs

                42 bit


42 × 10 µs

Transmitter pulse power / signal energy

700 kW / 7 J

30 kW / 12 J

Capability of instant probing signal power and structure changes

Not implemented


Detection range for a target with RCS of 2.5 m2:



  • 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

400 km

Detection accuracy:



  • range

1000 m

270 m

  • azimuth






  • range

3500 m

1600 m

  • azimuth

Range of MTI


0 - 500 km

Clutter suppression ratio


> 40 dB

Dynamic range of receiver and digital signal processor


up to 100 dB

Automatic control of upgraded height-finders



Number of controlled height-finders


up to 2

Start-up time

8 min

3 min

Power consumption

60 kW

40 kW

Main characteristics