Skip to Main Content
 

Global Search Box

 
 
 
 

Files

File List


ZREID_thesis_final.pdf (3.93 MB)

ETD Abstract Container

Abstract Header

Leveraging 3D Models for SAR-based Navigation in GPS-denied Environments

Reid, Zachary A.
http://rave.ohiolink.edu/etdc/view?acc_num=wright1540419210051179

Abstract Details

2018, Master of Science in Electrical Engineering (MSEE), Wright State University, Electrical Engineering.
This thesis considers the use of synthetic aperture radar (SAR) to provide absolute platform position information in scenarios where GPS signals may be degraded, jammed, or spoofed. Two algorithms are presented, and both leverage known 3D ground structure in an area of interest, e.g. provided by LIDAR data, to provide georeferenced position information to airborne SAR platforms. The first approach is based on the wide-aperture layover properties of elevated reflectors, while the second approach is based on correlating backprojected imagery with digital elevation imagery. Both of these approaches constitute the system we have designated: SARNAV. Building on 3D backprojection, localization solutions result from non-convex optimization problems based on image sharpness or correlation measures. Results using measured GOTCHA data demonstrate localization errors of only a few meters with initial uncertainty regions as large as 16 km^2. Finally, the system is incorporated into a Kalman filter tracker, where periodic SARNAV updates could be used to correct drift from an inertial navigation system. With measured data, the system was able to track the true position along the route within a few meters of error.
Joshua Ash, Ph.D. (Advisor)
Michael Saville, Ph.D., P.E. (Committee Member)
Arnab Shaw, Ph.D. (Committee Member)
73 p.
Electrical Engineering
sar; radar; radar imaging; gps; aircraft localization; sarnav; correlation; imaging; image processing; synthetic aperture radar; gotcha; lidar; localization; gps-denied

Recommended Citations

Citations

  • Reid, Z. A. (2018). Leveraging 3D Models for SAR-based Navigation in GPS-denied Environments [Master's thesis, Wright State University]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=wright1540419210051179

    APA Style (7th edition)

  • Reid, Zachary. Leveraging 3D Models for SAR-based Navigation in GPS-denied Environments. 2018. Wright State University, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=wright1540419210051179.

    MLA Style (8th edition)

  • Reid, Zachary. "Leveraging 3D Models for SAR-based Navigation in GPS-denied Environments." Master's thesis, Wright State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=wright1540419210051179

    Chicago Manual of Style (17th edition)

wright1540419210051179
538
© 2018, all rights reserved.
This open access ETD is published by Wright State University and OhioLINK.