Sander Geophysics Limited (SGL) provides worldwide airborne geophysical surveys for petroleum and mineral exploration, and geological and environmental mapping. This is that work, drawn as it flies.
SGL was founded in 1956 to provide ground geophysical surveys. Airborne surveys began in 1958 and have been the main focus since 1967. The head office and aircraft maintenance hangar are located at the international airport in Ottawa, and the company has operated on every continent, including Antarctica.
Nearly one third of SGL's resources are devoted to developing new and more efficient instrumentation and techniques. The aircraft, the sensors and the processing live under one roof, which is why the data reads the way it does.
AIRGrav, the Airborne Inertially Referenced Gravimeter, is the only purpose-built airborne gravimeter currently flying commercial surveys. The gravimeter sits on a three axis inertially stabilized platform with high resolution Differential GPS, so it stays far less affected by horizontal accelerations than systems built from modified sea gravimeters.
Accuracy is 0.2 mGal RMS throughout, in offshore work, over rolling terrain, and on loose drape over high mountains above 3,000 m.
SGL has flown and compiled more than 15 million line kilometres of high resolution airborne geophysical data since 1956, all of it with no aircraft accidents or serious injuries. SGL is a founding and accredited member of the International Airborne Geophysics Safety Association (IAGSA).
Sander Geophysics has been selected to fly a magnetic gradient and radiometric airborne geophysical survey over extensive parts of Nova Scotia. Survey flying has commenced in eastern Cape Breton.
SGL has completed the last flight collecting magnetic, electromagnetic and natural radioactivity data for this extensive project, which began in 2011 and provides detailed geophysical data for the whole country.
SGL has been selected to fly an airborne geophysical survey in the eastern part of Guinea, launched at an official ceremony in Conakry under the World Bank supported geoscience program.
Survey enquiries go to surveys@sgl.com. The services pages set out what each method measures and how a survey is planned, and the planner on the Services page runs the block arithmetic in the open.