Inter-comparison of Electric Fields measured by the Electron Drift Instrument (EDI) and the Electric Field and Waves Instrument (EFW ) on the CLUSTER Spacecraft
Torbert, R B
roy.torbert@unh.edu
University of New Hampshire, Space Science Center Morse hall, Durham, NH 03824 United States
Paschmann, G
Max Planck Institut f. Extraterrestrische Physik , D-875-15, Garching, Germany
Quinn, J
University of New Hampshire, Space Science Center Morse hall, Durham, NH 03824 United States
Mozer, F S
University of New Hampshire, Space Science Center Morse hall, Durham, NH 03824 United States
Mozer, F S
University of California, Berkeley, Space Sciences Laboratory, Berkeley, CA 94720 United States
Kistler, L
University of New Hampshire, Space Science Center Morse hall, Durham, NH 03824 United States
Mouikis, C
University of New Hampshire, Space Science Center Morse hall, Durham, NH 03824 United States
Haerendel, G
Max Planck Institut f. Extraterrestrische Physik , D-875-15, Garching, Germany
Puhl-Quinn, P
Max Planck Institut f. Extraterrestrische Physik , D-875-15, Garching, Germany
Andre, M
Swedish Institute of Space Physics, Uppsala, Sweden
Gustafsson, G
Swedish Institute of Space Physics, Uppsala, Sweden
Vaith, H
Max Planck Institut f. Extraterrestrische Physik , D-875-15, Garching, Germany
Foerster, M
Max Planck Institut f. Extraterrestrische Physik , D-875-15, Garching, Germany
Georgescu, E
Max Planck Institut f. Extraterrestrische Physik , D-875-15, Garching, Germany
McIlwain, C
University of California, San Diego, Center for Astrophysics and Space Science, La Jolla, CA 92093 United States
Kerr, S
University of California, San Diego, Center for Astrophysics and Space Science, La Jolla, CA 92093 United States
Kletzing, C
University of Iowa, Dept of Physics and Astronomy, Iowa City, IO 52245 United States
Matsui, H
University of New Hampshire, Space Science Center Morse hall, Durham, NH 03824 United States
Lindqvist, P
Royal Institute of Technology, Stockholm, Sweden
Pedersen, A
University of Oslo, Oslo, Norway
Fillius, W
University of California, San Diego, Center for Astrophysics and Space Science, La Jolla, CA 92093 United States

On CLUSTER, electric fields are measured by the double-probe technique (EFW) and by the Electron Drift Instrument (EDI). EFW measures the potential difference between spherical probes spinning in a plane, and computes the two components of the field in that spin plane. EDI measures the drift-step vector, which is the displacement of electron orbits after one gyro-period, and computes the two components of the field in the plane perpendicular to the magnetic field. Comparison of the field along the axis which is common to these two planes, shows very good agreement in many geophysical regions. Combining the two measurements yields a fully three-dimensional electric field measurement which we use to determine the electric fields in several interesting geophysical events seen in the early data from CLUSTER. These electric field data will be used also to compare with particle flow data in these events.