NSF-SUPPORTED NATIONAL FACILITIES FOR TERRESTRIAL CONTROLLED SOURCE

The National Geoelectromagnetic Facility - The National Science Foundation has awarded funding to develop and build ultra-wide band (dc, micro-Hz-to-hundreds of kHz) EM receivers and supporting equipment including transmitters, for MT, AMT, CSAMT, TDEM, IP, dc resistivity methods. These new instruments (expected to be commissioned in 2011) will be available to US investigators and their non-US collaborators. Depot, support and maintenance of these instruments will be carried out by Oregon State University, which is also carrying out these support functions for the two existing instrument pools detailed immediately below. For more information, please contact the NGF.

INDIVIDUAL LABORATORIES WITH SHARED-USE CSEM EQUIPMENT

Scripps Institution of Oceanography Marine EM Laboratory - 50 or so marine CSEM receivers are available as described under the entry for marine MT instruments. Two 500 amp deep-towed marine EM horizontal dipole transmitters are available to complete CSEM operations. There are no licensing agreements to restrict the use of the SIO transmitters, but compared with the receivers a higher level of engineering and scientific skill is currently needed to install, test, and operate these instruments. This makes collaborative research more viable than independent use at this time, but Scripps is interested in developing the broader use of this equipment. For more information about access contact Steven Constable. For details on the transmitters see http://marineemlab.ucsd.edu/instruments/suesi.html.