The Astor IV EW System

Multi band Electronic Attack (EA), Threat Emitter Simulator and Electronic Support (ES) System

Simulation of tactical scenario

Simulation of training

Mission profiles:

  • Escort jamming (EA)
  • Stand-Off jamming (EA)
  • Self-Protection jamming (SPJ)
  • Electronic Support (ES) ± jamming
  • Threat Emitter Simulation (TES)
  • Electronic Protection (EP) training
  • Test & Evaluation
  • UAV/Target Drone EA/SPJ/ES/TES
Dual Astor IV EW-Pods installed on an MB-339CB aircraft.

System Capabilities:

ASTOR IV is a dual pod surgical training/tactical jamming System. The dual pod configuration is used to achieve high isolation between receive and transmit so the system can receive during jamming. This is essential to counter modern frequency agile radars. The System contains three parallel jamming channels: two wideband DRFMs and one wideband SOR per band (total 8 DRFMs). This creates the ability to combine obscuration jamming and deception jamming. The techniques, that are fully user programmable, are:

  • Barrage noise
  • Spot noise
  • Spot noise with frequency memory
  • Pulsed noise 
  • Cover pulse with or without accelerating edges
  • False targets
  • Multiple false targets
  • Pattern projection (project a picture in the radar)
  • TETRIS (special high density false target technique)
  • Asynchronous pulse train

In addition, amplitude modulation (AM) can be applied to any technique and phase/frequency modulation can be applied to any DRFM technique.

The AM techniques are:

  • Constant gain
  • Constant gain with delay
  • Inverse gain
  • Square wave/swept square wave
  • Sawtooth/swept sawtooth
  • Sine/random sine
  • Count down

The phase/frequency modulations are:

  • Frequency sweep
  • Random frequency modulation
  • Coordinated doppler (coordinated with false target range motion)
  • Phase noise and binary phase noise
  • Binary phase shift keying
  • XRN (special alternating sideband modulation)
  • Chirp

Jamming techniques can be scheduled in time to create jamming sequences.

The System contains a PRI tracker that can identify fix and dwell & switch, stagger, sliding and jitter PRI. The primary purpose of the tracker is to support the generation of up-range false targets even if the radar uses agile PRI.

 System Data:

Frequency coverage:S-band (E/F), C-band (G), X-band (H/I/J) and Ku-band (J)
Antenna coverage:>50° (az) x 40° (el) aft and forward
Antenna Sectors:Forward, Aft Right, Aft Left
ERP:1 kW standard, 10 kW high gain antenna (forward only)
Sensitivity:Typically better than -75 dBmi
Minimum delay:<100 ns
Prime power:28 VDC
Power consumption:3,6 kVA

All user data (jamming techniques and log files) are stored on a USB key and the System contains no user data after power down. The System can also perform threat emitter simulation (TES) with a pre-programmed arbitrary waveform.

Simulation of surgical jamming with ASTOR IV parameters (multiple false targets with PRI tracking, 1 kW ERP)
Simulation of surgical jamming with ASTOR IV parameters (multiple false targets with PRI tracking, 1 kW ERP, inverse gain to mask the jammer azimuth)
Simulation of barrage noise jamming (500 MHz) with 100 kW ERP