GPR-SLICE V7.0 imaging using the Mala Mira 16 channel system was made at the Idaho National Laboratories. The survey, done by Shawn William and Niel Lish was used for utility mapping using the 200 MHz system at 8 cm separation between channels. This data is the first ever collected on US soil with the Mira system as FCC approval of the equipment is still being sought for public use. The 3D volume was generated from 0ns corrected, sprectral whitened and background filtered radargrams.
The IDS Stream used in a 15 channel array mode with 200 MHz antennas was used to collect data at a workshop sponsored by the Consiglio Nacionale dell Ricerche. The data were processed in GPR-SLICE v7.0 with multi-channel capabilities. An example of a 3D volume animation made from the site is shown in the YouTube video in the next frame. Stratigraphy mapping were the primary details found at the site which was originallyh believed to have area with Etruscan tombs.
Processing of Multi-Channel GPR Arrays in GPR-SLICE v7.0
GPR-SLICE was equipped to handle basic processing for multi-channel GPR array systems. Currently the software can be used to process the following multi-channel array systems: IDS Stream-Italy, MALA Mira-Sweden, Impulse Radar-Sweden, 3D Radar GeoScope-Norway GSSI Terravision-US, Isung-Korea, RPS-Australia The unique features added to GPR-SLICE multi-channel extended licenses are:
automatic detection and editing of the ground surface - 0 ns offset for each antenna in the array
integration of GPS navigation from a single unit on the multi-channel system with repositioning algorithm to calculate the location of each individual antenna channel from a global-single navigation track
single total station navigation is also used to reposition each multi-channel antenna in the array
one click info file generation on import for any number of tracks with all the preset manufacturers array geometries
channel balancing between antenna pairs is effectively handled using our Spectral Whitening filter process
fast compilation of processed radargrams to binary volumes for display in Open GL menus
With the current options available in GPR-SLICE, multi-channel time slice images can be quickly and easily generated using the new direct binary radargram compilation menu (released November 2010).
IDS Stream Multi-Channel Array GPR System from Italy
GPR-SLICE v7.0 imaging with Multi-channel capabilities was used to process data from a new IDS Stream multi-channel system. This compact 12 channel system with 600 MHz antennas separated by 12 cm is easily deployable and is just 1 meter wide. The subsurface imaging indicated reconstructred portions of a church plaza located in Castrocielo, Italy. The survey was part of a CNR-ITABC workshop made in concert with the University of Sienna and the University of Salento. A YouTube video made from spectral whitened radargrams is shown in the next frame
IDS Stream Multi-Channel Array System used to survey the plaza in front the Leaning Tower of Pisa. This system configuration has 16 antenna with central frequencied tuned to 250 MHz and with each antenna pair separated by 12cm. (Image courtesy of Gianfranco Morelli, GeoStudi Astier, Italy www.geostudi.it)
IDS GPR Stream Array formats are compatible with GPR-SLICE and are accessible with advanced multi-channel licenses available in the software. This image from the plaza of the Leaning Tower of Pisa in Italy was recorded and processed by Alex Novo and Gianfranco Morelli from GeoStudi Astier.
GSSI Terravision Multi-Channel Array GPR System - New Hampshire, USA
Since 2005, GPR-SLICE has been developed to process multi-channel data from a variety of equipment. GPR-SLICE has a special track menu which will automatically estimate the individual antenna pair navigation based on a single GPS antenna located on the mulit-channel system.
The Wiebe Group in Germany (www.wiebe.de) has developed their proprietary multi-channel system using the GSSI Terravision 14 Channel system. They have also engineeried their system to run a 4 channel horn antenna system, as well as other hi-frequeny air launched systems. The Wiebe Group has a GeoRail division (www.georail.de) which is applying GPR multi-channel surveying for highways as well as railways. GeoRail has several extended licenses of GPR-SLICE for multi-channel imaging. An example of multi-channel imaging done by GeoRail using GPR-SLICE is shown in the next diagram.
Daniela Hofmann from the GeoRail Division ran these time slices in GPR-SLICE during calibration testing of their new multi-channel radar system. The radar system has a single GPS unit on the radar system. Special navigation operations in GPR-SLICE generate the unique GPS tracks for each individual antenna pair so that accurate imaging can be made.
Multi-Channel data volumes just a regular single channel data volumes can be display with a variety of visualization tools in the built-in Open GL Graphics in GPR-SLICE.
Mala Mira Multi-Channel Array GPR System from Sweden
GPR-SLICE was equipped to seamlessly process Mala Geoscience's new MIRA multi-channel system in July of 2008. Here are example images from a GPS survey with the MIRA system. (data courtesy of Helder Teraco of GeoSurveys in Portugal).
3D Radar GeoScope Multi-Channel Array GPR System - Norway
A 3D Radar Geoscope multi-channel system in a 31 channel antenna configuration was used to survey the Haug site in Norway. Anomalies which may be consistent with a Chieftain burial were discovered. (Data courtesy of Kevin Barton and 3D Radar of Norway).
These set of time slice were generate from data collected with the GeoScope 31 channel multi-channel array system. The Haug Archaeological Site is the location of the Chieftain burial in Norway. A YouTube video of the complete dataset is shown below for GeoScope multi-channel dataset.
A 3D Radar GeoScope multichannel dataset over a railway in Spain was collected by Begoña Duclos Bautista of GEOFÍSICA CONSULTORES in Madrid. The image shows railway ties and other subsurface features using the GeoScope system with 7.5cm antenna separations.