**NEW Meeting Location!

 Event Location:
Churrascos
2055 Westheimer Road
Houston, TX  77098

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Speaker: Nigel Brady, Dynamic Gravity Systems 

The LaCoste and Romberg Dynamic Gravity Meter developed in the 1950s and 1960s demonstrated that airborne and marine gravity measurements were feasible to a reasonable degree of accuracy and led directly to commercial development of dynamic gravity meters for exploration surveys. The following 50 plus years have seen several major advances in both gravity measurement and positioning technology with advances in electronics and, more recently, high accuracy GPS. The original heart of the L&R meter - the ‘zero length spring’ balancing a mass on a beam has remained essentially unchanged during that time and continues with the latest version of the system built by Dynamic Gravity Systems. This new generation of airborne and marine gravity systems combine a full feedback system for the gravity sensor with GPS aided control of the gimbal platform to provide higher accuracy, better repeatability and lower noise than ever before.

The advanced technology system has now been thoroughly tested and has provided results on a number of surveys for both geophysical research and oil and gas exploration. The meters have been used on aircraft ranging from a Cessna 180 to a Lockheed C-130 Hercules and a 20ft pontoon boat to multi streamer seismic vessels. The results obtained have validated the hoped-for improvements in data quality and reliability of the new meters as will be shown in this discussion.

Speaker Biography: Nigel Brady, Dynamic Gravity Systems
Nigel Brady is a director at Dynamic Gravity Systems in charge of Operations and Customer Service. He has a BS degree in Physics and Geology and a Graduate Diploma in Business from the University of Auckland. Since 1990 he has worked in geophysics running gravity instruments for surveys in boreholes, on land, ships and aircraft for companies like Edcon-PRJ, Micro-g Lacoste and the National Geodetic Survey on all seven continents. More recently he is a founding partner of Dynamic Gravity Systems where he provides most of his operational and trouble shooting advice from the comfort of his office in Denver.

**There is no registration fee for our SIG meetings. Dinner and drinks are available from the establishment's menu. We ask that you continue to pre-register, to prepare meeting room set up. *There will be a 4% charge on your individual check for the venue.

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