Today’s
magnetic installations are typically
configured with a vector fluxgate
magnetometer (for measuring the three orthogonal components of the
geomagnetic field); a scalar magnetometer for measuring the total field
intensity, a theodolite (for orienting the vector magnetometer), and a
data collection platform for storing data.
However, a key
trend to watch for is the replacement of multiple instrumentation
packages (i.e. fluxgate and total magnetic intensity systems) with new,
single instruments, such as the
Overhauser
and
Potassium
Suspended dIdD
(delta Inclination delta Declination) system
from GEM.
The Suspended dIdD
simplifies the set-up of
magnetic observatory installations by
eliminating the need for fluxgate magnetometers and thermal insulating
structures. In addition, the
new system minimizes ongoing system
calibrations, which, in turn, frees personnel to concentrate on more
essential tasks, such as interpreting and understanding data.
On the platform
side, reknowned GEM customers, such as the British Geologic Survey
(BGS), are currently making their in-house developed software
acquisition platform available globally. In addition, large
organizations, such as the Australian Geoscience Organization (formerly
AGSO) and the United States Geological Survey (USGS) are standardizing
on GEM technologies.
Applying Advanced Magnetic Technologies
With new, highly stable instruments available, it is an ideal time to
take advantage of GEM’s proven line of observatory magnetometers.
The company’s EUROMAG scalar magnetometer is a global standard
for total field measurements based on long-term stability and
sensitivity. An example of this type of installation is at http://www.intermagnet.org/imos/imoasp_e.html.
The world's newest observatory at Tihany, Hungary is based on the recently developed
Suspended dIdD. This suspended system eliminates the
need for fluxgate magnetometers in observatories, and saves costs of
buying and configuring multiple types of instrumentation.
Product characteristics are as follows:
EUROMAG
delivers an economical stationary total
field magnetometer system with excellent long-term monitoring
characteristics.
Overhauser
(fast
and very fast versions) provide excellent long-term monitoring
characteristics for both stationary and portable applications.
dIdD
Suspended Vector
fast-cycling and standard-cycling vector magnetometer for continuous
monitoring of the earth's magnetic field.
GEM User Links
Below is a partial list of
Magnetic Observatories that have standardized on or implemented GEM Systems. If
you require additional information on a particular observatory listed (or not
listed) here, please contact GEM.
Intermagnet.
Global network of
observatories, monitoring the Earth's magnetic field.
IAGA.
International Association of Geomagnetism and Aeronomy, is the premier
international scientific association promoting the study of terrestrial and
planetary magnetism and space physics
Canada. Canadian National Geomagnetic Program. Standardized on GEM.
Finland.
Numivarji Observatory,
Germany.
Niemegk
and Munich Observatories.
Hungary.
Tihany Observatory.
Japan.
Kakioka Observatory and others.
South Africa.
Hermanus Observatory.
United Kingdom.
Multiple observatories, including
Eskdalemuir Observatory
(Scotland).
British
Geological Survey and
others has standardized on GEM.
USA.
Multiple observatories. USGS is standardizing on GEM.
GEM Advanced Magnetometers.
Our World is Magnetic.
Applications
