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Accueil > Recherche > Plasmas Spatiaux > Instrumentation spatiale > Contribution aux missions spatiales > Cluster/STAFF
Cluster/STAFF
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The Cluster mission is made of four spacecraft in tetrahedral configuration (see ESA page). Each spacecraft has onboard search-coil magnetometer, called STAFF for Spatio-Temporal Analysis of Field Fluctuation.
LPP team :
Scientists : P. Canu (PI), N. Cornilleau-Wehrlin (former PI), G. Belmont, G. Chanteur, A. Retino, L. Rezeau, A. Roux, F. Sahraoui
Computer scientists : V. Bouzid, R. Piberne, P. Robert, R. Katra
Some important publications :
- Robert P., Cornilleau-Wehrlin N., Piberne R., De Conchy Y., Lacombe C., Bouzid V., Grison B., Alison D., Canu P., CLUSTER-STAFF search coil magnetometer calibration - comparisons with FGM, Geoscientific Instrumentation, Methods and Data Systems 3 153-177, 2014.
- Cornilleau-Wehrlin, N., L. Mirioni, P. Robert, V. Bouzid, M. Maksimovic, Y. de Conchy, C.C. Harvey, O. Santolík, STAFF Instrument Products Distributed Through the Cluster Active Archive, 159-168, The Cluster Active Archive, Astrophysics and Space Science Proceedings, H. Laakso et al. (eds.), Springer, 2010.
- Cornilleau-Wehrlin N., G. Chanteur, S. Perraut, L. Rezeau, P. Robert, et al.. First results obtained by the Cluster STAFF experiment. Annales Geophysicae, European Geosciences Union (EGU), 21 (2), pp.437-456, 2003.
- Cornilleau-Wehrlin N., Chauveau P., Louis S., Meyer A., Nappa J.M., Perraut S., Rezeau L., Robert P., Roux A., de Villedary C., de Conchy Y., Friel., Harvey C.C., Hubert, D., Lacombe C., Manning R., Wouters F., Lefeuvre F., Parrot M., Pinçon J.L., Poirier B., Kofman W., Louarn Ph., CLUSTER Spatio-Temporal Analysis of Field Fluctuations (STAFF) Experiment, Space Sci. Rev., 79, (1-2), 107-136, 1997.
List all publications using STAFF data
Description of the STAFF search-coils
The AC magnetometer is made of 3 antennas (27 cm long) inside a thermal protection which smoothes the thermal variations without perturbing the measurements of the magnetic field. The antennas are at the end of a 5 meters boom to prevent it from measuring the noise produced by the spacecraft and by the other instruments.
Image : artist view showing the boom on which the STAFF experiment is mounted (down on the right), Source ESA.
Noise Equivalent Magnetic Induction (NEMI) of the STAFF search-coils
The NEMI curve is obtained by measuring the output noise of the instrument in a quiet environment (Magnetic Observatory of Chambon-la-Forêt). Dividing it by the output noise of the instrument transfer function yields the magnetic field noise curve which gives an idea of measurable magnetic fields (in a standard frequency band 1Hz ) .
Technical properties of the instrument
| Sensitivity at 10Hz | 0.5pT |
| Sensitivity at 100Hz | 0.05pT |
| Sensitivity at 1kHz | 0.012pT |
| Length of sensor | 27 cm |
| Mass of 1 sensor (before coating) | 120 g (/sensor) |
| Mass of the tri-axis (3 coated sensor + support) | around 1 kg |
| Mass of the electronics | 250 g |
| Electric power | 100 mW |
More details about magnetic search-coils can be found here.
STAFF databases
LPP database STAFF-SC
and
LPP database STAFF-SA
LESIA STAFF/SA database :
LESIA STAFF/SA PSD
and
LESIA STAFF/SA other data products
All data are available from the ESA Cluster Science Archive
