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Micro-g LaCoste Air-Sea System II (AS-2) gravity meter   

Description

Micro-g LaCoste Air-Sea System II (AS-2) gravity meter is designed to measure the earths field to an accuracy of 0.01 mGal, in pitch and roll conditions up to 22 deg. The RV Investigator is equipped with a Micro-g LaCoste Air-Sea System II used to measure variations in the earth's gravitational field. The system consists of a highly damped, spring-type gravity sensor that is mounted on a gyro stabilized platform with associated electronics for obtaining gravity readings. It measures the earth's gravity to an accuracy of 0.01 mGal, offers dynamic repeatability better than 0.25 mGal and an internal sampling of analog signals of 1000 Hz to provide a 21 bit effective resolution. This system is permanently installed at the centre of the vessel and is operated continuously, however the system has some operational limitations according to sea state. In rough weather the gravity meter may need to be clamped and turned off to prevent damage. This decision rests with the technical staff.

Purpose

A gyroscopically stablised instrument used to measure variations in the Earth's gravitational field.

Operations

Weight 86 kg on land
Year built 2014
Make and model Lacoste & Romberg L&R Air-Sea Gravity System II
Power requirements 240 watts

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