Concept prototype · 20X study · Not the official SGL website
SANDER GEOPHYSICS SGL · Ottawa · Est. 1956
●  Services / Survey methods

Seven methods. One aircraft pass can carry several.

SGL specializes in surveys using one or more of the following methods, performed with specially modified fixed wing aircraft or helicopters. A digital elevation model from SGL's scanning LiDAR, or radar and laser profiler data, is a standard product on all surveys.

S.01Gravity (AIRGrav)Airborne gravity with AIRGrav, the only purpose-built airborne gravimeter currently flying commercial surveys, flown in an efficient light aircraft during normal daytime conditions, and combinable with magnetic and radiometric instruments.Detail →
S.02Magnetic Total FieldHigh resolution magnetic total field surveys, the structural mapping workhorse of airborne geophysics. Typical Figures of Merit for SGL's fixed wing aircraft are near 1 nT.Measures: susceptibility
S.03Magnetic GradientTriaxial magnetic gradiometer measurement, flown on the modified Grand Caravans, for sharper definition of structure and near surface features.Measures: field gradient
S.04ElectromagneticFrequency domain EM with the SGFEM system, transmitter and receiver in the Twin Otter's wingtip pods, mapping conductivity with depth.Measures: conductivity
S.05Gamma-ray SpectrometerFull spectrum radiometrics for geological mapping, with up to 63 litres of detector crystals. Environmental monitoring detects and quantifies natural and anthropogenic radiation.Measures: radioelements
S.06Methane Mapping (SGMethane)SGMethane, SGL's airborne methane sensing system, part of the instrument family developed in house in Ottawa.Measures: methane
S.07Scanning LiDARScanning LiDAR elevation data. A digital elevation model derived from LiDAR, or a combination of radar and laser profiler data, is a standard product on all surveys.Measures: elevation

Immediate data processing is part of SGL's standard quality control procedure, in the field, while the aircraft is still deployed.

Planner console

Run the block arithmetic.

● Survey block plannerFormula in the open
241
Flight lines
9,640
Line kilometres
43.4
Flying hours, on line

Lines = floor(block width in m / line spacing) + 1 · Line km = lines x line length · Hours = line km / (speed in kt x 1.852). Defaults echo the Turner Valley case on the AIRGrav page: a 60 km block at 250 m spacing. Planning figures only; SGL plans each survey to the block, the terrain and the target.