Subsurface object position and image correction for standoff Ground Penetrating Radar

Conference · Sun May 01 00:00:00 EDT 1994

OSTI ID:10166759

Kane, R J

Present applications of standoff (airborne) Ground Penetrating SAR (Synthetic Aperture Radar) allows objects near the surface to be detected but only provides an approximation for the actual location and image. When single media models are employed the lack of correction for the phase velocity and refractive changes at the air/soil interface result in object distortions. Positional errors and image distortions comparable to the size of the object are possible. Correction is possible, if the media properties are known, by modeling the scene as a two-layer medium and accounting for the propagation effects. The propagation parameters for the lower media are estimated in the migration of observable responses for surface and subsurface objects. This approach allows for corrected images to subsurface objects to be produced after data collection. Surface objects will be distorted as a result of this process. The modeling process, simulations, and results with field data will be discussed. An improvement by a factor of two would enable standoff radar to detect objects at depths of on meter or more benefiting Unexploded Ordnance (UXO) and hazardous waste site survey activities.

• Research Organization: Lawrence Livermore National Lab., CA (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-48
• OSTI ID: 10166759
• Report Number(s): UCRL-JC--117191; CONF-9405159--3; ON: DE94015180
• Country of Publication: United States
• Language: English

Related Subjects

054000
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
440800
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
450100
47 OTHER INSTRUMENTATION
CHEMICAL EXPLOSIONS AND EXPLOSIVES
CORRECTIONS
DATA PROCESSING
DETECTION
HAZARDOUS MATERIALS
HEALTH AND SAFETY
MATHEMATICAL MODELS
MISCELLANEOUS INSTRUMENTATION
ORDNANCE
PERFORMANCE TESTING
REMEDIAL ACTION
SYNTHETIC-APERTURE RADAR
TANKS
UNDERGROUND
UNDERGROUND DISPOSAL