Geometrics Memory-Mag G-856AX, Руководство по эксплуатации

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Geometrics, Inc
.
G-856AX Operation Manual
31
The measurements acquired and stored in the G-856AX will be indexed according to a
station number assigned by the magnetometer’s processor. Station numbers are assigned
sequentially as measurements are stored. If you use MagMap2000 to download and
process the G-856AX measurements then there is some flexibility in the manner that you
traverse the survey lines. That is, you can proceed in a bidirectional manner from one
line to the next as shown in Figure 21. Alternatively, you can acquire measurements in a
unidirectional fashion by always starting the next survey line at the same side of the
survey area and visit each station while heading the same direction. As long as you
proceed in a consistent fashion from one line to the next MagMap2000 will be able to
locate the measurement points correctly.
For greatest measurement accuracy it is best to orient the sensor in the same direction at
each station when acquiring the measurement. The same is true for the orientation of the
operator: you should consistently position yourself in the same place, relative to the
sensor, and face in the same direction. The technique will reduce the effects of any
residual magnetization generated by the equipment or your personal effects.
As described in the Operating procedures section, the magnetic field is measured by
simply pressing the
READ
key and is stored by pressing the
STORE
key. It is a good
practice to try to remember the last several readings so that you can judge the validity of
the current reading before storing it. If the current reading is in question do not press
STORE
– take another reading and store it if appears that its value is reasonable.
Figure 21, Typical survey layout.