Cross-calibration and Comparison of Measurements Between the Particle and Field Instruments on Cluster
McFadden, J P
EM: mcfadden@ssl.berkeley.edu
Space Sciences Lab, University of California, Berkeley, Berkeley, CA 94596 United States
Mozer, F S
Space Sciences Lab, University of California, Berkeley, Berkeley, CA 94596 United States
Carlson, C W
Space Sciences Lab, University of California, Berkeley, Berkeley, CA 94596 United States
Parks, G
Space Sciences Lab, University of California, Berkeley, Berkeley, CA 94596 United States
Larson, D
Space Sciences Lab, University of California, Berkeley, Berkeley, CA 94596 United States
Bosqued, J M
CESR, France, Toulouse, France
Dandouras, I
CESR, France, Toulouse, France
Reme, H
CESR, France, Toulouse, France
Sauvaud, J A
CESR, France, Toulouse, France
Balogh, A
Imperial College, UK, London, United Kingdom
Dunlop, M
Imperial College, UK, London, United Kingdom
Decreau, P
LPCE/CNRS, Frrance, Paris, France
Kistler, L
UNH, Durham, NH, Durham, NH United States
Moebius, E
UNH, Durham, NH, Durham, NH United States
McCarthy, M
UW, Seattle, WA, Seattle, WA United States
Klecker, B
MPE, Garching, Germany, Garching, Germany
Bavassano-Cattaneo, M
IFSI, Rome, Italy, Rome, Italy
Lundin, R
SISP, Kiruna, Sweden, Kiruna, Sweden
Balsiger, H
Univ. of Bern, Switzerland, Bern, Switzerland
Korth, A
MPAe, Lindau, Germany, Lindau, Germany
Andre, M
SISP, Uppsala, Sweden, Uppsala, Sweden
AB: The prime objective of the Cluster mission is to make multi-point observations in order to resolve the meso-scale structure of the magnetosphere. Reliable multi-point observations require accurate calibration and cross-calibration of the various instruments on the four spacecraft. Cross-calibrations include comparison of the absolute density determined by the particle sensors, by the sounder, and from the spacecraft potential. Electric field calibrations include a comparison of measured E with -VxB. In order to understand gradients determined from differences between spacecraft, a good understanding of instrumental limitations is also required. This paper will present an comparison of observations from the ion and field instruments, including behavior at boundaries. Emphasis will be on ion data from CIS, including a discussion of measurement limitations and common data analysis errors.