SOF ES Systems

SOF systems are modular ESM/ELINT systems for use in manned and unmanned airborne,ground, and shipborne monitoring systems. Their primary function is to detect, identify, locate and track pulsed RF signals. System modularity allows installation of multiple IF channels in a common hardware infrastructure. RF signals are collected at the sensor antennas and converted into multiple IF bands. Each IF band on an SOF system handles an instantaneous bandwidth of 1GHz and can provide all the classical ELINT data, including bearing on every detected pulse within its band. The SOF system relies on proven Finder software operating on an embedded Linux-based single board computer. It includes support for a variety of interfaces (1553, A429, serial, GbE, etc.) for tying into existing platform infrastructure (GPS, INS, network). In also includes support for receiving and decoding AIS messages for monitoring shipping traffic.

Key Features - PDF Datasheet
RF Capability:

  • Wide RF instantaneous coverage via multiple 1GHz BW IF receivers

Direction Finding - 3 Options (or combos)

  • ADF - Pulse amplitude differences from arrays of antennas, determines bearings
  • Per-pulse DF over entire RF range
  • Spinning DF - High RPM spinning antenna determines bearings
  • Bearings limited to spinner beamwidth
  • External DF (e.g. interferometer) can be cued
  • Precise bearings, but limited due to frequency range

Pulse Measurement Performance:

  • Pulse Width: 50 ns min, no effective max
  • PRF/PRI: > 1 M pulses per second per band


  • Built-in GPS with disciplined OCXO
  • Can use external GPS/Reference clock

Data/Control Processing:

  • Pulse Descriptor Words (PDWs) / messages built in hardware (SPR XMCs)
  • “Finder” Software algorithms perform deinterleaving/ID/location/tracking on onboard single board computer (QCore i7)
  • Linux OS (RedHat or Centos)
  • Full suite of computer interfaces
  • DVI, USB, Serial, 3xGbE, SATA 3.0
  • Internal or external storage

Other Capabilities:

  • Dual band AIS Receiver
  • COMINT or other SIGINT addons


  • 500 W, 120VAC, 47-440Hz or 24-32VDC


  • ATR w/ Convection/Conduction Cooling
    • ATR w/ full conduction option
    • Rackmount/Convection option
  • Altitude:
    • -100 To 20,000 Feet (Receiver)
    • -100 to 65,000 Feet (Sensors/RFDs)
  • Temp:
    • -40° To 55°C (Receiver)
    • -65° To 71°C (Sensors/RFDs)
  • Vibe: Per MIL-STD 810G, Cat-13


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For over two decades, Aeronix has provided leading-edge products and engineering services to the defense, aerospace, and industrial electronics industries. Aeronix solves tough technical problems on time and on budget.

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