RE: [SEGMIN]: BHP's Airborne Gravity Gradiometer System

[AG Marketing FC BG JD MP GP BH]

In regards to the BHP announcement Ken Witherly advised us of on May 18, I
found it interesting that BHP actually showed nothing which was identified
as gravity gradient data. Their excellent examples of using gravity data to
high grade magnetic leads apparently showed simply gravity data of the type
which Carson Aerogravity has been measuring from S-61 helicopters and DHC-6
Twin Otters for more than 20 years at 2 to 4 km half wave lengths. I can
understand BHP not going out of their way to mention this fact to share
holders, but it was totally disingenuous of them to claim "Falcon - the
world's first effective gravimetric surveying tool" (BHP  slide 29). The
patented Carson Aerogravity survey system has collected more than 1,000,000
km of aerogravity data in 35 countries for 65 clients (including BHP
Petroleum PTY). Hats off to BHP for their gradiometer! Now they  need to
show some real gradiometer data vs. conventional aerogravity data in order
to demonstrate that they have actually improved on a system they could have
contacted at a small fraction of the cost of the Falcon system. 

Glen Penfield
Vice President

Carson Services, Inc.
Aerogravity Division
952 Blooming Glen Road
Perkasie, PA  18944  USA

Phone:  215-249-3535
Fax:    215-249-1352
E-mail:  [EMAIL PROTECTED]


-----Original Message-----
From: Ken Witherly [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 18, 2000 7:38 PM
To: Segmin@Lists. Geosoft. Com
Subject: [SEGMIN]: BHP's Airborne Gravity Gradiometer System


BHP announced yesterday that their airborne gravity gradiometer system is
flying. The attached JPEG is from a local (Melbourne) newspaper. The url
leads to the full talk (lots of other BHP bumf), there are some additional
images showing data from Ekati and Western Australia. Enjoy.

Ken Witherly

http://www.bhp.com.au/financials/brief/default.htm


Condor Consulting, Inc.
St. 206, 4860 Robb Street
Wheat Ridge CO 80033
Tel: 303-423-8475
Fax: 303-423-9729
www.condorconsult.com



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