Mobile radar MARS-L

Mobile combined PSR/SSR L-band Radar MARS-L is a ground-based radar system implementing combined operation of primary and secondary channels. Design of transmitter and receiver of MARS-L relies on advanced technology of operation with complex strobing signals and jamming protection.

Combined operation of primary and secondary channels allows for significant increase in detection range and accuracy at relatively low radiation power. Besides, availability of additional flight information (flight number, altitude, remaining fuel, technical status, etc.) increases flight safety and diminishes the probability of anti-aircraft missile accident engagement against commercial aircraft.


Missions of MARS-L:

  • build-up of radar coverage, air defence combat alert duty in peaceful time (airspace control, monitoring of airspace use, etc.)
  • flight mission assurance in the terminal area;
  • strategic build-up of radar coverage;
  • provision of surveillance and combat information to anti-aircraft missile units, air force units, EW units when conducting combat operations;
  • flight mission assurance of commercial and NATO aviation for joint actions, exercises and operations involving army.


Applications of MARS-L:

  • as aerodrome control radar for flight mission assurance units;
  • as radar field gap filler for radar troops;
  • as mobile low-altitude surveillance radar for Land Forces Air Defense;
  • as mobile NATO standardized secondary radar for rapid reaction force peacekeeping operations;
  • as target acquisition and designation radar for prospective anti-aircraft missile systems.


Functions of MARS-L:

  • aircraft detection, displaying of position, automatic measurement of range and azimuth from radar primary channel;
  • aircraft interrogation, receiving and displaying replies from radar secondary channel;
  • combining data received from primary and secondary channels;
  • automatic tracking, flight trajectory estimation;
  • acquisition, displaying and processing of air situation from another radar, generation of multi-radar tracks
  • automatic height-finder control, altitude calculation;
  • automatic distribution of air situation;
  • recording of air situation;
  • semi-automatic topographic referencing of radar position (GPS-based);
  • technical monitoring and diagnostics.


Antenna rotation system:

MARS-L is designed with new horn type radiator and additional antennas (side lobe suppression and back lobe suppression antennas) to sufficiently improve the beam pattern.



  • increased number of RF channels;
  • new 5-channel RF rotary joint;
  • Tx/Rx/ equipment has modular design of units and subunits;
  • Tx/Rx/ are solid-state and fail-soft.
  • Asynchronous pulse interference is completely suppressed by digital signal processing.


Passive interference is rejected through digital MTI and generation of adaptive clutter map. Operating range of MTI is from 0 to 150 km.


Protection against active jammers is implemented through automatic jamming monitoring with displaying of jamming environment on workstation monitor, PSR frequency shifting (250 frequencies with 0,4 MHz steps), wide dynamic range of the PSR receiver and digital signal processing unit.


Performance characteristics of MARS-L:



Power consumption

8 kW

Start-up time:


- From mains

3 min

- From power plants

4 – 5 min

Time of deployment (tearing down) by qualified personnel

10 min

Protocol of data acquisition and output

(САТ 001, 002)

Number of vehicles


Travel speed:


- on unpaved roads

25 – 40 km/h

- on highways

40 – 60 km/h


5000 h


30 min

Service life

10 years or 60 000 h


Main characteristics of primary and secondary MARS-L radar are given in the table





- azimuth



- range, not less than

150 km

≥150 km

- angle of evaluation

0,5° … 28°

0,5° … 28°

Scanning interval, not more than

10 s

10 s

Detection area by target with RCS=2,5 m2, Р=0,5:

- minimal range

1000 m

2,7 km

- maximal range

150 km

220 km

Mean-square error of coordinate measuring:

- range, not more than

150 m

200 m

- azimuth, not more than



Range resolution, not more than

230 m

150 m

Azimuth resolution, not more than

Productivity on processing and displaying of AC in the coverage area, not less than


Working frequency range, MHz

1250 … 1350,

 250 frequencies with 0,4 MHz spectrum

1030 – request,

1090 – RBS reply, 740 – ATC reply

Transmitter pulse power, not less

1,8 ± 0,2 kW

0,8 ± 0,2 kW

Types and duration of sounding signals:

- Amplitude Modulated signal

1,5 μs


interrogation – 0.8 µs

response – 0.45 µs

- PSK-13

19,5 μs

- PSK-42

63 μs