Andrew Boyd New generation helicopter time domain EM systems

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VT<strong>EM</strong> • North American design and manufacture • Highest moment system flying, focus on bedrock conductor detection. Not designed for mapping • Multi-turn transmitter used to get power. Slow ramp off as a result, reduces bandwidth for vertical resolution • Running from Helicopter power (weight) www.geotechairborne.com.au www.igs.net.au
Skytem • Developed in Denmark initially for water applications and brought to Australia for mapping capability • Novel dual square waveform gives high and low power during flight. Low power option provides for very shallow mapping Power 113,000Am 2 & 12,500 Am 2 Turnoff 31μs & 4μs • High drag, Slow flying • Measures horizontal (X) and vertical (Z) components which can help in bedrock conductor interpretation www.igs.net.au www.geoforce.com.au
Page 1 and 2: New Generation Helicopter Time Doma
Page 3 and 4: Numerous Flavours of Airborne EM. P
Page 5 and 6: Key factors to development • Desi
Page 7 and 8: Symmetry • In-loop or Coincident
Page 9 and 10: Flying Height- Controls benefit of
Page 11 and 12: Key factors to development Technolo
Page 13: Hoistem MkII • Australian develop
Page 17 and 18: XTEM • New system in 2009 • Aus
Page 19 and 20: What’s In Common • Low flying
Page 21 and 22: Basemetal Nepean NiS Ground Respons
Page 23 and 24: Mapping Able to replicate very shal
Page 25 and 26: Interpretation & Presentation • C
Page 27 and 28: Whats Next... • HTDEM Systems now

Andrew Boyd New generation helicopter time domain EM systems

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