HR: 16:35h
AN: SM14A-03    [Abstracts]
TI: Comparison of Auroral and Inner CPS in situ Measurements During an Expansive Phase Onset
AU: * Donovan, E
EM: edonovan@ucalgary.ca
AF: University of Calgary, Department of Physics and Astronomy, Calgary, T2N 1N4, Canada
AU: Spanswick, E
EM: emma@phys.ucalgary.ca
AF: University of Calgary, Department of Physics and Astronomy, Calgary, T2N 1N4, Canada
AU: Jackel, B
EM: brian.jackel@ucalgary.ca
AF: University of Calgary, Department of Physics and Astronomy, Calgary, T2N 1N4, Canada
AU: Trondsen, T
EM: trondsen@phys.ualgary.ca
AF: University of Calgary, Department of Physics and Astronomy, Calgary, T2N 1N4, Canada
AU: Syrjaesuo, M
EM: mikko.syrjasuo@fmi.fi
AF: Finnish Meteorological Institute, Space Science, Helsinki, FIN-00101, Finland
AU: Liang, J
EM: jun.liang@space.gc.ca
AF: Canadian Space Agency, John H. Chapman Space Center, St. Hubert, PQ J3Y 8Y9, Canada
AU: Liu, W
EM: william.liu@space.gc.ca
AF: Canadian Space Agency, John H. Chapman Space Center, St. Hubert, PQ J3Y 8Y9, Canada
AU: Connors, M
EM: martinc@athabascau.ca
AF: Athabasca University, 1 University Drive, Athabasca, AB T9S 3A3, Canada
AU: Voronkov, I
EM: igor@phys.ucalgary.ca
AF: University of Calgary, Department of Physics and Astronomy, Calgary, T2N 1N4, Canada
AU: Voronkov, I
EM: igor@phys.ucalgary.ca
AF: Athabasca University, 1 University Drive, Athabasca, AB T9S 3A3, Canada
AU: Wild, J
EM: j.wild@lancaster.ac.uk
AF: Lancaster University, Department of Communication Systems, Lancaster, LA1 4Y, United Kingdom
AU: Daum, P
EM: p.daum@lancaster.ac.uk
AF: Lancaster University, Department of Communication Systems, Lancaster, LA1 4Y, United Kingdom
AU: Mende, S
EM: mende@ssl.berkeley.edu
AF: University of California Berkeley, Space Sciences Laboratory, Berkeley, CA 94720, United States
AU: Frey, H
EM: hfrey@ssl.berkeley.edu
AF: University of California Berkeley, Space Sciences Laboratory, Berkeley, CA 94720, United States
AU: Angelopoulos, V
EM: vassilis@ucla.edu
AF: University of California Berkeley, Space Sciences Laboratory, Berkeley, CA 94720, United States
AU: Angelopoulos, V
EM: vassilis@ucla.edu
AF: University of California, Los Angeles, Institute of Geophysics and Planetary Physics, Los Angeles, CA 90024, United States
AU: Russell, C
EM: ctrussel@igpp.ucla.edu
AF: University of California, Los Angeles, Institute of Geophysics and Planetary Physics, Los Angeles, CA 90024, United States
AU: McFadden, J
EM: mcfadden@ssl.berkeley.edu
AF: University of California Berkeley, Space Sciences Laboratory, Berkeley, CA 94720, United States
AU: Glassmeier, K
EM: kh.glassmeier@tu-bs.de
AF: Technical University of Braunschweig, Mendelssohnstr 3, Braunschweig, 38106, Germany
AU: Auster, U
EM: u.auster@tu-bs.de
AF: Technical University of Braunschweig, Mendelssohnstr 3, Braunschweig, 38106, Germany
AU: Singer, H
EM: Howard.Singer@noaa.gov
AF: NOAA Space Environment Center, 325 Broadway, Boulder, CO 80305, United States
AU: Sakaguchi, K
EM: kaori-s@za2.so-net.ne.jp
AF: Nagoya University, Solar-Terrestrial Environment Laboratory, 3-13, Honohara, Toyokawa, 442-8507, Japan
AU: Shiokawa, K
EM: shiokawa@stelab.nagoya-u.ac.jp
AF: Nagoya University, Solar-Terrestrial Environment Laboratory, 3-13, Honohara, Toyokawa, 442-8507, Japan
AU: Rostoker, G
EM: rostoker@space.ualberta.ca
AF: University of Alberta, Department of Physics, Edmonoton, AB T6G 2J1, Canada
AU: Rae, J
EM: jrae@phys.ualberta.ca
AF: University of Alberta, Department of Physics, Edmonoton, AB T6G 2J1, Canada
AU: Mann, I
EM: imann@phys.ualberta.ca
AF: University of Alberta, Department of Physics, Edmonoton, AB T6G 2J1, Canada
AU: Dunlop, M
EM: M.W.Dunlop@rl.ac.uk
AF: Rutherford Appleton Laboratory, Chilton, Didcot, OX11 0QX, United Kingdom
AU: Reme, H
EM: henri.reme@cesr.fr
AF: Centre dEtude Spatiale des Royonnements, Toulouse, Toulouse, FRA 1234, France
AU: Fazakerly, A
EM: anf@mssl.ucl.ac.uk
AF: University College London, Mullard Space Science Laboratory, Dorking, RH5 6NT, United Kingdom
AB: On March 13, 2007, there was a sequence of auroral and contemporaneous magnetotail activity that occurred during a period when the THEMIS constellation was in the evening sector inner CPS. The satellites were magnetically conjugate to the auroral zone in western Canada. The viewing conditions over numerous All-Sky Imagers (ASIs) in Canada were excellent. Although the THEMIS satellites were still in commissioning phase, the fluxgate magnetometers (FGM) were operating on all five satellites during this event, as was the electrostatic analyzer instrument on THEMIS A. As well, three GOES satellites were collecting geosynchronous magnetic field data over Canada throughout the event. Preliminary analysis shows the following. There was an onset at roughly 0508 UT either at or earthward of the position of THEMIS D (just beyond geosynchronous distance), and then propagated outwards over THEMIS B, A, and E in turn. This appears as an outwardly propagating decrease in cross-tail current as inferred from FGM; however, the current sheet in the vicinity of THEMIS E was increasing in strength and/or thinning while the onset was already in progress closer to the Earth. ASI, meridian scanning photometer, and riometer data show that the onset occurs in the same meridian as the THEMIS spacecraft, and allow us to identify the ionospheric signatures of the dispersionless injection and the earthward edge of the ion plasma sheet. Our conclusions based on this preliminary study are as follows: 1) the 0508 UT onset occurred near geosynchronous orbit and was not preceded by a fast earthward flow; 2) growth phase continued further from the Earth on probes to the East of the onset meridian; 3) the optical onset, dispersionless injection (from riometers), and local decrease in cross tail current all happened at the same time; 4) inter-comparison of ground- based and in situ observations highlight the importance of the coordinated use of ground and satellite data for overcoming azimuthal and radial magnetic projection uncertainties.
DE: 2716 Energetic particles: precipitating
DE: 2730 Magnetosphere: inner
DE: 2744 Magnetotail
DE: 2764 Plasma sheet
DE: 2790 Substorms
SC: SPA-Magnetospheric Physics [SM]
MN: 2007 Fall Meeting