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Synthetic Aperture Radar (SAR, iSAR)

Description

The SAR Module is an extension of the FMCW base module. A step-motor-controlled linear axis allows movement of the transceiver and antenna and thus produces radar images with defined time-stamps and positions for SAR operations. SAR aggregates the data in a time-multiplex approach. SAR allows producing resolutions which go far beyond results of a normal antenna.

To run iSAR, the system requires the Mobile Target Positioning System to rotate the target.

SAR-Arrangement-smallFMCW-without-SARFMCW-with-SAR

The left image show the measurement arranement: a table with a parabilic reflector as measurement target. The second image shows a blurry simpls FMCW measurement of the target. The third image shows a SAR image, exhibiting the clear contures of the parabolic reflector and the table (in a top-down view).

Features

  • Operating Modes (enabled in the hardware)
    • FMCW
  • Scopes (enabled through FreeScopes) 
    •  B-Scope (time-scale), displaying the SAR image
    • A-Scope
  • Amplification
    • Amplification of raw signal (IQ signal) at receiver
    • Amplification of filtered signal in the scopes
  • Filters and Signal Treatment
    • Sensitivity Time Control (STC)
    • Signal Threshold and Limiter
    • Range Calibration and Extension
    • Cutting out selections of the signal range
    • Hamming
    • Hanning
    • Blackman
    • Blackmanharris
    • Signal Threshold and Limiter
    • Range Calibration and Extension
    • Cutting out selections of the signal range
    • Moving Target Detection and Indication
    • and more
The FreeScopes applications in the SAR and FMCW Base Module get active in a plug-and-play approach, as soon as the radar on its own, or in conjunction with the SkyRadar CloudServer are plugged in.

Topics

The FMCW Base Module can be applied to experiment on the following subjects (selection):

  • Experiments on Synthetic Aperture Radars
  • Calibrating a radar setup using amplification, filters and settings
  • Experiments on amplification of source as well as of the signals
  • Clutter processing e.g., through Sensitive Time Control (STC)
  • for iSAR: Radar Cross Section (RCS) analysis allowing for an understanding of the varying detectability of objects based on material, absolute and relative size, reflection angle, distance and strength of the signal.
  • Allows analyzing performance and false alarm tolerances through adjustment of the sensitivity.
  • Adjustable decision threshold allowing for experiments on background noise.
  • And much more.

Parts (Basic Configuration)

The SAR Module consists of:

    • one (1) linear axis (2050 mm) driven by a stepper motor
    • one (1) control unit providing
      • drive control and visualization system
      • Wireless LAN connection SAR/iSAR serverSAR and iSAR control server
  • One (1) SAR and iSAR management server 
    • rack server
    • Intel® Celeron® Quad-Core J1900 SoC (2.0 GHz)
    • 1 x Intel SSD S3520 150GB SATA-3 3,5 Zoll (Capacity: 150 GB)
    • management software licence
  • One (1) cable set.

Prerequisites

  • Computer with latest HTML5 enabled browser. Current versions of Chrome, Firefox, MS Internet explorer, Opera and Safari are able to read HTML5.
  • SkyRadar FreeScopes (comes free with the FMCW Base Unit)

Extensions

The SkyRadar SAR and FMCW Base Module is accessible by an unlimited amount of concurrent users. The broad coverage of solutions useful in ICAO and EuroControl ATCO and ATSEP training programs as well as IATA qualifications make SkyRadar the preferred choice of many aviation academies and IATA TrainAir Plus accredited institutions. Many universities and military academies use the PSR Base Module within their qualification, education, training or research programs.

FMCW Base Module Data Sheet

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