b). GEM System


GSM –19 T Proton Magnetometer and DGPS

Specifications:

·              Performance sensitivity: <0.1nT @ 1Hz

·              Resolution: 0.01nT

·              Absolute accuracy: 1nT

·              Dynamic range: 10,000 to 120,000nT

·              Gradient tolerance: Over 7000nT/m

·              Sampling rate: 1 reading per 3 to 60sec

·              Operating temperature: -40C to +60C

·              Base station: Time, date and reading stored at 3 to 60 second intervals

·              Storage: 16Mb (# of readings), mobile: 838,860, base station: 2,796,202,
walking mag: 1,677,721

·              Data download software: Gemlink5.4 version