Cluster EFW measurements of bow shock thickness, speeds, and normals
Bale, S D
EM: bale@ssl.berkeley.edu
 Space Sciences Laboratory, University of California, Berkeley, CA 94720 United States
 Mozer, F S
 Space Sciences Laboratory, University of California, Berkeley, CA 94720 United States
 Andre, M
 Swedish Institute for Space Physics, Uppsala Division, Uppsala, Sweden
 Ericsson, A
 Swedish Institute for Space Physics, Uppsala Division, Uppsala, Sweden
 Gustafsson, G
 Swedish Institute for Space Physics, Uppsala Division, Uppsala, Sweden
 Holmgren, G
 Swedish Institute for Space Physics, Uppsala Division, Uppsala, Sweden
 Lindqvist, P
 Royal Institute of Technology, Royal Institute of Technology, Stockholm, Sweden
 Holtet, J
 Department of Physics, University of Oslo, Oslo, Norway
 Lybekk, B
 Department of Physics, University of Oslo, Oslo, Norway
 Pedersen, A
 Department of Physics, University of Oslo, Oslo, Norway
 Grard, R
 Solar System Division, ESTEC, Noordwijk, Netherlands
 Laakso, H
 Solar System Division, ESTEC, Noordwijk, Netherlands
 Mursula, K
 Department of Physical Sciences, University of Oulu, Oulu, Finland
 Tanskanen, P
 Department of Physical Sciences, University of Oulu, Oulu, Finland
 Yerby, K
 ACSE, University of Sheffield, Sheffield, United Kingdom
AB: Using electric field and spacecraft potential data from the Electric Field and Wave experiment (EFW) on Cluster, we present a preliminary analysis of several bow shock crossings. Spacecraft potential is used, as a proxy for electron density, to identify the shock ramp. A timing analysis gives the shock speed and normal, which then give a spatial measurement. We will also discuss preliminary work on electric field measurements and electrostatic turbulence in the shock transition region.