Foliage creates a barrier that can reflect signals and prevent them from reaching the objects and terrain below. FOPEN is performed using low-frequency radar systems (see SAR) whose long wavelength signals naturally penetrate foliage. Optical and infrared sensors do not penetrate through foliage and can even be reflected by other, less dense barriers including clouds and smoke.

Low-frequency radar systems can produce a variety of data products through foliage. For example, SAR imaging with low-frequency radar allows manmade objects, such as buildings and vehicles, to be directly detected through foliage. Additionally, significant changes beneath foliage can be detected by using the CCD process. (See CCD)


Using FOPEN and combining it with other ISR solutions allows IMSAR systems to perform multiple applications in a variety of industries. Typical uses for IMSAR’s ISR solutions can include:

  • Intelligence Gathering
  • Disaster Preparation & Response
  • Emergency Rescue
  • Livestock & Wildlife Monitoring
  • Military Surveillance
  • Border Security
  • Tracking Applications
  • Search & Rescue Operations
  • Counter Drug Trafficking Operations
  • Wildland Fire Monitoring


IMSAR systems that are capable of performing UWB are available in a variety of configurations that are designed for easy integration onto manned or unmanned aircraft. The following configurations can be used for UWB missions:

  • NSP-5 UWB

For more information about UWB and other products, contact us by e-mail at or call IMSAR sales at 801.798.8440.



Penetrating Radar is a radar imaging capability that exploits the advantages of low-frequency radar bands, such as ultra-wide band, to see through foliage, the ground, and other visual obstructions permeable to radio waves.


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At IMSAR we believe intelligence is everything. We are dedicated to excellence in rapid technology innovation, manufacturing, and program execution; and remain committed to decreasing size and increasing the capabilities of our radars.

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