Subsurface object position and image correction for standoff Ground Penetrating Radar
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; TRN: AHC29416%%17
- Resource Relation:
- Conference: Unexploded ordnance detection and range-remediation conference,Golden, CO (United States),17-19 May 1994; Other Information: PBD: May 1994
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
45 MILITARY TECHNOLOGY, WEAPONRY, AND NATIONAL DEFENSE
11 NUCLEAR FUEL CYCLE AND FUEL MATERIALS
SYNTHETIC-APERTURE RADAR
PERFORMANCE TESTING
DATA PROCESSING
ORDNANCE
DETECTION
TANKS
REMEDIAL ACTION
UNDERGROUND
CORRECTIONS
MATHEMATICAL MODELS
UNDERGROUND DISPOSAL
HAZARDOUS MATERIALS
440800
450100
054000
MISCELLANEOUS INSTRUMENTATION
CHEMICAL EXPLOSIONS AND EXPLOSIVES
HEALTH AND SAFETY