Tomographic Inversion of Crosshole Radar Data: Confidence in Results

Crosshole radar tomography is increasingly being used to characterize the shallow subsurface and to monitor hydrologic processes. Although tomographic inversion provides a subsurface model, confidently interpreting the resulting image can be challenging. We conducted a simple modeling study to bette...

Full description

Saved in:
Bibliographic Details
Main Authors: Clement, William P, Knoll, Michael D
Format: Report
Language:English
Subjects:
EARTH MODELS
Geodesy
GRIDS
HYDROLOGY
INVERSION
LIMITATIONS
RADAR
Radiofrequency Wave Propagation
SHALLOW DEPTH
SUBSURFACE
TOMOGRAPHY
WAVE PROPAGATION
Online Access:Request full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Crosshole radar tomography is increasingly being used to characterize the shallow subsurface and to monitor hydrologic processes. Although tomographic inversion provides a subsurface model, confidently interpreting the resulting image can be challenging. We conducted a simple modeling study to better understand the capabilities and limitations of tomographic inversion. We start with a known earth model, simulate a tomography experiment, and invert the synthetic data. We investigate the effects of straight and curved ray approximations to wave propagation, regularization, grid size, and starting model. We also investigate the effects of limited ray coverage through the earth model and noise in the data. Understanding the effects of these different methods and parameterizations will help us place confidence limits on modeled features to more accurately reflect our knowledge of the subsurface.