START-UP OF A NEW ONE-SECOND VARIOMETER IN SAN PABLO DE LOS MONTES
GEOMAGNETIC OBSERVATORY (SPAIN)
Tordesillas, J.M., Aguado, J.
Instituto Geográfico Nacional - Spain
San Pablo de los Montes Geophysical
Observatory (SPT) is used as reference for geomagnetic studies that
IGN carry out in the Iberian Peninsula and is part of the Intermagnet
geomagnetic worldwide network.
This observatory have available a pair of variometers FGE and Geomag
that obtain H, D, Z components, in addition to magnetometers to get
total field F, providing one minute data in real time.
During 2017, and following the requirements of Intermagnet to receive
one-second data from the observatories, we have proceed to the
installation, orientation and start-up of a new variometer FGE.
We have buried a brand new installation of wires both for data and 12
V power. In one of the spaces inside the variometers vault, the new
variometer has been installed, oriented and calibrated. It has been
also placed a crystal dome to cover and protect the variometer against
dust and possible temperature and humidity variations.
The new variometer has a 24 bits A/D converter ObsDAQ and a data
collection platform MAGREC-4B, with an acquisition software for
monitoring and produce one second data in IAGA-2002 format.
We are going to be doing intercomparisons between variometers in order
to study the goodness of the new installation. Once the new variometer
works stable and without faults it will be considered as primary. So,
from this moment on we plan to adapt the actual FGE to one-second
requirements to be considered as backup.