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Differential shipboard magnetic and gravity measurements

MAGE specialists use the following equipment in order to perform differential shipboard magnetic and gravity measurements:


Equipment

Chekan-AM Gravimeters, made in Russia, FSUE CSRI Electropribor

Measurement range: 10 Gal minimum
Limits of permissible measurement error ± 0.3 - 0.8 mGal
Sensitivity (scale division value) 0.01 mGal
Gravimeter response time 35 to 100 sec
Gravimeter drift rate 2 mGal/day max

SeaSPY Magnetometers, made in Canada (Marine Magnetics)

Absolute accuracy 0,2 nT
Sensor sensitivity 0,01 nT
Counter sensitivity 0,001 nT
Measurement range от 18 000 nT до 120 000 nT
Gradient tolerance over 10000 nT/m

MAGE developed the technique of high-precision gravity and hydromagnetic gradient surveys. This allows even at high latitudes (above 70⁰ N) to conduct magnetic measurements in combination with seismic for regional survey with an error less than +3-5 nT and +0.5-2 nT during detailed operations. Gravity measurements are performed in combination with seismic at sea disturbance up to 4 points, with an error of +0.3-0.4 mGal during regional operations and +0.1-0.2 mGal during detailed operations.


Photo from expeditions MAGE

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