Posts Tagged ERA-MAX

3D modeling of ERA’s gradient survey results

Posted by on Friday, 14 January, 2011
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UBC-GIF has finished 3D modeling of resistivity gradient survey data with EH3Dinv code (http://era-max.ca/examples.html, last two examples ). EH3Dinv is a computing code developed at UBC − GIF for inverting controlled source frequency-domain EM data to recover a 3D electrical conductivity (Inversion of 3D electromagnetic data in frequency and time domain using an inexact all-at-once approach. Eldad Haber, Uri M. Ascher, and Douglas W. Oldenburg. GEOPHYSICS, VOL. 69, NO. 5, 2004; P. 1216–1228).

The ERA’s technology, in brief, is “cross-disciplinary” – between frequency-domain and direct current (DC) concepts. The technology provides high resistivity resolution by grounded, non-contact and/or combined modes of electrical field measurements at 1.22-2500Hz. In comparison with DC method ERA equipment is several times more sensitive and in comparison with frequency-domain is defined as high-resolution.


ZOND-MULTIMAX software for geoelectric imaging

Posted by on Wednesday, 8 December, 2010

ERA ZOND-MULTIMAX includes comprehensive tools for protocol generating and executing of automated geoelectric imaging (tomography) procedure;

- processing and analysis of the tomography data;

- usability and full compatibility with ERA equipment;

- creating and controlling any measurement protocol including for ground and water area 2D/3D tomography, cross-borehole imaging;

- auto optimization of arrays and protocols most suitable for geolectrical and ground conditions.


High-Resolution ELECTRIC field measurements in any surface conditions

Posted by on Sunday, 24 October, 2010

The ERA’s technology of resistivity method exposes the best sensitive to subsurfce resistivity variations as well as a simplicity in theory and in field operations.

The non-contact measurements of electric field has been developed generally in Russia since 60-s - in 1963 for non-contact electrical profiling (B.G.Sapozhnikov), with 1981 – for geoelectrical sounding (A.S.Nahabtcev and A.I.Jabluchansky).

Now the idea has realized on the modern electronic and engineering basis in ERA equipment – transmitter, receiver, special antennas, “active” electrodes, ERA-MULTIMAX imaging system with “active” contacts. The equipment provides wide broad resistivity studies with  very high resistivity resolution.

The main applications – ground water, weak alteration processes, archeology, civil engineering, mineral exploration in any surface conditions in any electromagnetic noise including intown operations.