The November meeting of the Potomac Geophysical Society will be held November 18th at the Fort Myer Officers’ Club in Arlington, VA (http://www.fmmcmwr.com/maps.htm) in the Campaign Room. This month’s talk will be: Acoustic and Laser Interferometric Buried Landmine Detection by James M. Sabatier, US Army Research Laboratory, Adelphi, MD.
Acoustic techniques for buried mine detection use airborne sound to excite vibrations in the ground. Buried landmines have mechanical impedances that are smaller than that of soils. This impedance contrast allows vibration measurements to be used as a detection technique. Laser interferometric techniques are used to read out the ground vibrations.
Various image and signal processing techniques, including statistical approaches, have been successfully used and even in double blind field tests. This acoustic/vibrometric mine detection approach has been well studied in the buried mine detection R & D community. One limiting factor is the low 1-10 Hz frequency resolution required. This results in long dwell time for the vibration sensor which limits platform forward speed. Currently several interferometric techniques currently in use to address forward speed issues are being investigated. I hope to cover all of these topics in my presentation.
James Sabatier received a PhD in physics from the University of Mississippi in 1984. He currently holds the position of Research Professor of Physics in the Department of Physics and Astronomy at Mississippi and Principal Scientist at the National Center for Physical Acoustics. His research interests include physical acoustics, coupling of sound into the ground, acoustics of porous materials and acoustic signatures of humans. Since August 2009 he is serving in an IPA position in the Networked Sensors and Fusion Brach at ARL.
Chicken Florentine (House salad & vegetables, rolls and butter)
Coffee / tea
A vegetarian meal can be substituted by request.
Reception at 6:30. Dinner at 7:30. Talk at 8:30 PM. Please note that the talk starts earlier than the usual time. Allow 15 minutes for security entering Ft. Myer as all civilian vehicles are searched. To ensure access to and from Fort Myer use the Hatfield Gate, open 24 hours a day (http://www.fmmcmwr.com/directionsmyer.htm). If you wish to attend dinner ($25), please make reservations with Joydeep Bhattacharyya at 571-269-8432 or via E-mail at Joydeep.firstname.lastname@example.org. If you wish, please feel free to attend the talk without dinner. Non-members and guests are welcome. Visit the PGS web site at http://www.potomacgeophysical.com for new meeting announcements, etc. Please send changes of address or email to Joydeep.email@example.com.