29B6 'Kontayner' OTH Radar

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29B6 'Kontayner' OTH Radar
Kontainer.png
Frequencies 6.1 MHz,32 MHz
Frequency Range 6.1 MHz - 32 MHz
Mode USB
Modulation Pulsed,FMOP
ACF 25 ms
Emission Designator
Bandwidth 3.5 kHz,7 kHz,14 kHz,28 kHz
Location Russia
Short Description 29B6, nicknamed 'Kontayner', is a Russian over the horizon radar. It is currently very active in Europe.
I/Q Raw Recording Download file
Audio Sample

29B6, nicknamed 'Контейнер' (Kontayner), is a Russian over the horizon radar. It is currently very active in Europe. The radar uses 150 antenna masts with data transmission systems, transmitters and receivers, a power station and control buildings. It is able to detect both high altitude and low altitude aircraft and missiles at very long ranges.


The first 29B6 radar installation is based at Kolkino radar station. The receiving antennas are located 8 km south-west from Kovylkino, Mordovia, Russia 53.9841°N 43.8427°E. The transmitting antennas are located 300 km from receiver, 5 km north from Gorodets town, Nizhegorodskaya oblast', Russia 56.69328°N 43.48625°E.


As of 2018 or 2019, the Gorodets transmitter station has been dismantled and a new transmitter built near the Kovylkino receiver. [1] Another 29B6 facility has been planned to be built in Kaliningrad. [2]


29B6 uses pulsed modulation with Frequency Modulation On Pulse (FMOP), unlike many other OTHOver The Horizon (very long range) radars which tend to use Frequency Modulated Continuous Wave (FMCW). Like some other OTHOver The Horizon (very long range) radars, the 29B6 can transmit multiple beams simultaneously on multiple frequencies.


As of about 2019, the 29B6 almost always transmits 40 pulses/sec which gives an unambiguous range of 3750 km. Bandwidth of the signal is usually about 14 kHzKiloHertz (kHz) 10^3 Hz but it's often hard to determine accurately due to splattering that is caused by its pulsed operation. Other modes may still be used but they are rarely seen.


Previously, it commonly used 50 pulses/sec (max range 3000 km), but it was also seen with 25 sweeps/sec (max range 6000 km) and 100 sweeps/sec (max range 1500 km).


29B6 can be confused with the PLUTO II radar but can be usually differentiated by its different sweep rate (40 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz). vs 50/25/12.5 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).), slightly narrower bandwidth and sharper or rougher sound. Signal analysis will reveal pulsed operation.

Samples[edit]

50 pulses/sec, old 40 pulses/sec 50 pulses/sec, new
29B6 50 swps sec.png
29B6 40Hz 14kHz.png
29B6 50Hz 14kHz.png


50 pulses/sec

40 pulses/sec, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables), demodulated with higher (14 kHzKiloHertz (kHz) 10^3 Hz) bandwidth

40 pulses/sec, AMAmplitude Modulation

40 pulses/sec, FMFrequency Modulation. Notice rough sound as FMFrequency Modulation demodulation gives out noise when the pulse is off.

29B6 Sounder[edit]

The 29B6 radar has a sounder signal which is used to check ionospheric conditions so that suitable transmission frequencies can be selected for the main radar.

The sounder has a bandwidth of about 10...12 kHzKiloHertz (kHz) 10^3 Hz (13-14 kHzKiloHertz (kHz) 10^3 Hz has also been reported) and transmits short pulses at a rate of 10 HzHertz (Hz), unit of frequency, defined as one cycle per second (1 Hz).. Like the main radar, the sounder uses FMFrequency Modulation on pulse, but the FMOP sweep goes downwards, not upwards. Due to its slow pulsing rate, the sounder signal sounds similar to the old, infamous Duga radar.

The sounder starts from the low end of the radar operating frequency range and hops frequencies in an ascending manner. When it gets near the other end of the frequency range, it pauses for a while and then starts its sounding run again.


Samples[edit]

29B6 Sounder 29B6 Sounder, new sample
28B6 sounder.png
29B6 sounder closeup.png


29B6 sounder, USBUpper Side Band Modulation (Radio, referring to reception and modulation mode)Universal Serial Bus (Computer, referring to USB Ports and cables) demodulated with wider bandwidth

29B6 sounder, AMAmplitude Modulation demodulated


Slow sounder (note: this may not belong to the 29B6 radar?)

29B6 Sounder Slow
SlowSounder29B6.png

Video Examples[edit]

Additional Links[edit]

Notes[edit]

  1. https://planesandstuff.wordpress.com/2020/02/25/russian-othr-29b6-konteyner-analysis/
  2. https://planesandstuff.wordpress.com/2020/03/23/more-konteyner/

Additional Images[edit]