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L06-page11 - • Advantages • Don’t need to be...

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11 Alkali Vapor Magnetometer •Advantages • Don’t have to align ‘bottle’ with field • Very rapid, almost continuous •Disadvantages • Can’t measure vector field •Measurement accuracy : • 0.01 to 1nT Magnetic Gradiometer Takes differences between two measurements that are made close together Divides result by distance between sensors
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Unformatted text preview: • Advantages • Don’t need to be corrected for diurnal variation • Provides high resolution of near surface feature • Disadvantages • Won’t measure large scale features • Essentially automatic removal of regional • Lower signal-to-noise ratio...
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