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A. Chambodut and J.-J. Schott |
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Title |
GEOMAGNETIC OBSERVATORY PRACTISE, INSTRUMENTATION AND NETWORK |
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Conference - International - Communication |
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2009 |
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IAGA 11th Scientific Assembly, 23-30 August 2009
The recent progresses in ground based magnetic observatory operation encompasses several aspects: instrumentation, acquisition, accuracy estimation, data processing, data transmission, opening of new observatories...
In the present state of the art, manual absolute measurements remain the most accurate way of controlling the base lines of the magnetometers, whatever their type. Efforts are made for several years towards more automatization (Automatic DI Flux : Rasson and Van Loo; GAUSS : Auster et al.; DIDD : Hegymegi, Krmendi et al.; Vectorial Helium pumped magnetometer : Léger et al.; ...). Nevertheless, these recent proposed solutions are either : still under development, still need the presence of an observer or/and their instrumental reference frame is difficult to determine.
The observatories have still to be operated by a trained observer. This condition may be hard to fulfil in remote areas as in Antarctica or when strong economic pressure may result in a reduction of the observer staffs.
Concerning the new generation of numerical acquisition, the typical reference becomes the Intermagnet network that recommended in 2003 to produce one-second data. The current concerns focus on resolution (< 1 pT), sampling rate and time accuracy (< 10 ms).
Worldwide synchronized one second data acquisition and dissemination will probably be a big challenge for the next future, especially in the context of the forth-coming Swarm satellite mission. |
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1294 |
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Author |
A. Chambodut and J.-J. Schott |
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Title |
Current status of permanent magnetic observatories in French Austral and Antartic Territories |
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Conference - International - Article with Reading Comitee |
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2010 |
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The 5 permanent magnetic observatories of French Austral and Antarctic territories (Amsterdam, Concordia, Crozet, Dumont d'Urville and Kerguelen) are integrated as active participants in the worldwide network of magnetic observatories (INTERMAGNET), which monitor variations of the Earth's magnetic field at all time scales.Proceedings of i-DUST (INTER DISCIPLINARY UNDERGROUND SCIENCE AND TECHNOLOGY CONFERENCE), June 9-11 2010, Apt, France. |
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139;905 |
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Bachelor's thesis |
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1465 |
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Author |
A. Chambodut and M. Menvielle. |
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Title |
From 1-minute to 1-second sampling interval at geomagnetic observatories: example of French magnetic observatories of Austral and Antarctic territories |
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Conference - International - Communication |
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2011 |
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IUGG 2011 Melbourne Australia.
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139;905 |
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Bachelor's thesis |
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3583 |
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Author |
A. Chambodut, A. Marchaudon, C. Lathuillère, M. Menvielle |
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Title |
New geomagnetic indices alpha with 15 minutes time resolution |
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Conference - International - Communication |
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2015 |
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26th IUGG general assembly 2015 |
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139 |
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yes |
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6065 |
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Author |
A. Chambodut, D. Di Mauro, J.-J. Schott, L. Cafarella, S. Lepidi |
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Title |
The permanent magnetic observatory of Concordia station (Dome C, Antarctica) |
Type |
Conference - International - Poster |
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Year |
2009 |
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IAGA 11th Scientific Assembly, 23-30 August 2009 |
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A magnetic observatory was opened at the beginning of 2005 in the inland of Antarctica (lat. 75°06'S, long. 123°23'E). Since the opening, the field is recorded almost continuously at a one second and one minute rate. The base lines of the triaxial variometer are controlled by standard absolute measurements made at a regular rate all over the year. Absolute values of the field components are available at any rate lower than or equal to one second.
Recently, in January 2009, a new data acquisition system was installed. This new system (Magnetic Acquisition and Recording Cell 1.0 -- M.A.R.Cell 1.0, developed by EOST) enables to record data, vectorial and of intensity, resulting from the same logger but also a wide set of instrumental parameters such as temperatures, voltages, ... Several technical and scientific improvements are presented such as the quasi-real time repatriation in Europe of the data automated by email (every half-day, limited by the station network itself).
The new magnetic acquisition system allows : (i) to fulfil the 2003 Intermagnet requirements concerning the acquisition of 1Hz data, (ii) to cope with the difficulties arising in the operation of an observatory in such extreme conditions (as for instance an external temperature varying between minus 30°C and minus 70°C and a total darkness lasting two months), and (iii) to prepare the new requirements of synchronized one second ground data acquisition and dissemination in the context of the forth-coming Swarm satellite mission. .
The validity of the results is discussed in the light of the data provided by the nearest observatories (Dumont d'Urville, Scott Base, Mario Zuchelli base) and in comparison with various global or regional models. |
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905 |
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yes |
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5746 |
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Author |
A. Chambodut, D. Di Mauro,P. Bordais, L. Agnoletto, P. Di Felice |
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Title |
Three years continuous record of the Earth's magnetic field at Concordia station (DomeC, Antarctica) |
Type |
Journal Article |
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Year |
2009 |
Publication |
ANNALS OF GEOPHYSICS |
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Volume |
52-1 |
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15-26 |
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The magnetic observatory deployed at DomeC, Antarctica, in the French-Italian base known as Concordia base, is now permanently running for more than three years. This paper focuses on these long-term results which are more relevant for an observatory intended to provide absolute values of the field. The problems which came up in the light of this fairly long record are discussed and solutions suggested in order to upgrade the observatory to the standards of an absolute one (i.e. Intermagnet standards). |
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905 |
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1593-5213 |
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5747 |
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A. Chambodut, J.-J. Schott, D. Di Mauro, L. Cafarella and S. Lepidi |
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Title |
Inside the Southern Polar Cap: Geomagnetic Field Observations at Concordia Station (DomeC, Antarctica) |
Type |
Conference - International - Poster |
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2009 |
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ESA's Second Swarm International Science Meeting, |
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905 |
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yes |
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5749 |
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Author |
A. Chambodut, J.-J. Schott, D.DiMauro and J.-F. Vanaker |
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Title |
INSIDE THE SOUTHERN POLAR CAP : GEOMAGNETIC FIELD OBSERVATIONS AT CONCORDIA STATION (DOMEC, ANTARCTICA) |
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Conference - International - Poster |
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Year |
2010 |
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Dome C permanent magnetic observatory was opened at the beginning of 2005 in the inland of Antarctica (lat. 75°06'S, long. 123°23'E). The observatory, located above an ice shelf of more than 3 000 meters thickness, is unaffected by crustal field contaminations and coastal tidal effects. Furthermore, it lays inside the Southern polar cup, close to the South Corrected Geomagnetic pole. In these regions, the Earth’s magnetic field is stronger and the external field influences are enhanced.
The magnetic observatory operates in the standard way : 1 Hz magnetic measurements are recorded with
absolute measurements controlling the triaxial variometer base lines and total field records proving
additional redundancy.
The validity of the measurements is discussed in the light of the data provided by the nearest
observatories and in comparison with various geomagnetic models |
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139;905 |
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531 |
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Author |
A. Chambodut, J.J.Curto, J.Matzka,M. Nosé, V. Mendel, A. Bernard, J.M. Brendle |
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Title |
International Service of Geomagnetic Indices: Current status |
Type |
Communication |
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2017 |
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2017 joint iapso-iamas-iaga assembly in cape town, south africa (http://www.iapso-iamas-iaga2017.com) |
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The International Service of Geomagnetic Indices (ISGI) is in charge of the elaboration and dissemination of IAGA’s endorsed geomagnetic indices and lists of remarkable magnetic events through its official Web portal.
This is possible thanks to reports of magnetic observatories distributed all over the planet and thanks to work done by the 6 ISGI-Collaborating-Institutes (ISGI-CIs: Ebro Observatori, Spain; GFZ, Potsdam, Germany; WDC, Kyoto, Japan; AARI, St Petersburg, Russian Federation; DTU Space, Copenhagen, Denmark; EOST, Strasbourg, France).
ISGI official Web portal known a complete upgrade in 2014-2015 at the occasion of its headquarters’ moving from LATMOS to EOST. In 2017, a second phase of update is in progress to meet the actual requirements towards users and stakeholders. Various elements are currently settled by or in close cooperation with ISGI-CIs:
- DOI referencing in order to get full recognition,
- Licence choices to clearly set allowed actions onto the available datasets, but also their protection,
-APIs design for interoperability,
- Metadata editing for data mining and standardised information.
As a regular Member of ICSU World Data System, ISGI participates to various on-going projects on data management structuration. The example of the EPOS European Project (European Plate Observing System), which aims at implementing an operational and sustainable platform of Earth science services, is given. |
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6893 |
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A. Chambodut, J.M.G. Merayo, M. Menvielle and S. Vennerstroem |
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Title |
A Magnetometer for Mars tested at Concordia Magnetic Observatory, Antarctica |
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Conference - International - Poster |
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2011 |
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IUGG 2011 Melbourne Australia. |
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3610 |
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