1887

Abstract

A helicopter towed bistatic EM system capableofsimultaneously transmitting and receiving at<br>several user-selected frequencies has been developed, and is currently operational in mineral<br>exploration programs in Australia. This system employs advanced digitally controlled<br>transmitter electronics providing flexible user selections for current waveforms, as well as<br>advanced built-in digital signal acquisition and processing including real-time sine/cosine<br>correlation for spectral analysis of the data. A reference, or “bucking” coil is incorporated,<br>which is wired in reverse polarity to the primary receiver coil, thus removing the direct system<br>response as observed iq the absence of a conductive target (i.e. at high altitudes). This feature<br>is critical in maximizing the observability ofthe weaker response from currents induced in the<br>earth. A case study is presented with presentations of apparent conductivity maps for real<br>survey data.

Loading

Article metrics loading...

/content/papers/10.3997/2214-4609-pdb.202.1999_100
1999-03-14
2021-11-29
Loading full text...

Full text loading...

http://instance.metastore.ingenta.com/content/papers/10.3997/2214-4609-pdb.202.1999_100
Loading
This is a required field
Please enter a valid email address
Approval was a Success
Invalid data
An Error Occurred
Approval was partially successful, following selected items could not be processed due to error