THEMIS AGU Press Conference: “NASA SPACECRAFT MAKE NEW DISCOVERIES ABOUT NORTHERN LIGHTS”
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Transcript of THEMIS AGU Press Conference: “NASA SPACECRAFT MAKE NEW DISCOVERIES ABOUT NORTHERN LIGHTS”
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THEMIS AGU Press Conference:“NASA SPACECRAFT MAKE NEW DISCOVERIES ABOUT NORTHERN
LIGHTS”
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Vassilis AngelopoulosTHEMIS Principal Investigator
University of California, Los Angeles
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THEMIS Night Side Science
SubstormtoOrbits.mpg or http://svs.gsfc.nasa.gov/vis/a000000/a003300/a003356/index.html
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March 23rd Substorm
POLARmovie.mpg
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Mar. 23rd Substorm Raeder Model
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David SibeckTHEMIS Project Scientist
NASA Goddard Space Flight Center
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Sun Magnetosphere
Dayside Science
Dayside Simulation
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Flux Transfer Events
FluxTransferEvent.avi
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Flux Ropes or Boundary Waves?
Let THEMIS-the blindfoldedGreek goddessof impartial justice decide!
Flux ropes Boundary wavesbulge outward bulge one wayin both directions or the other
AEDCB AEDCB
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Observation and Interpretation
40
0
B (
nT
)
THEMIS-E
40
0
B (
nT
)
THEMIS-D
40
0
B (
nT
) THEMIS-C
40
0
B (
nT
)
THEMIS-A
40
0
B (
nT
)
22:00 22:01 22:02 22:03 22:04UT
THEMIS-B
THEMIS May 20, 2007
-40
0
40
Bx (
nT
)
THEMIS-D
13.0
12.5
12.0
11.5
11.0
10.5
10.0
Y (
R E)
8.0 7.5 7.0 6.5 6.0 5.5 5.0
X (RE)
Magnetosphere
Magnetosheath
30 nT
20 nT
10 nT13.0
12.5
12.0
11.5
11.0
10.5
10.0
Y (
R E)
8.0 7.5 7.0 6.5 6.0 5.5 5.0
X (RE)
A
ED
C
B
Bxy
Sphere
Sheath
-,+
Five THEMIS spacecraft were used to construct cross-sections indicating a flux rope detached from the magnetosphere
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Flux Ropes Power the Magnetosphere!
30 kiloVolt battery in spaceFlux ropepumps650,000Amp currentinto the Arctic!
+ -
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Jonathan EastwoodTHEMIS researcher
University of California at Berkeley
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Computer simulation of a Hot Flow Anomaly
Courtesy: Dr. Nick Omidi Solana Scientific Inc.
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The THEMIS ground observatories tracked the pressure
pulse across north America
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Bios and Photos
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Vassilis Angelopoulos, THEMIS Principal Investigator, University of California, Los Angeles; Prof. Vassilis Angelopoulos is a space physicist with 15 years of experience in magnetospheric research. He has authored and co- authored 65 publications in refereed journals on data analysis, plasma theory and space plasma phenomenology, space technology, space instrumentation and mission analysis and design. His research interests include plasma sheet transport, electromagnetic instabilities in the plasma sheet and its boundary, beam-induced ionospheric low frequency waves, substorm physics, turbulence and self-organized criticality.
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David Sibeck, THEMIS Project Scientist, NASA Goddard Space Flight Center; Dr. David Sibeck has worked at the Johns Hopkins University Applied Physics Laboratory (1985-2002), NASA Headquarters (2004) and NASA GSFC (2003 - present). He is the author or co-author of over 180 scientific articles on Sun- Solar System Connection Physics. He received the American Geophysical UnionÕs MacElwane award in 1992 and is a fellow of that organization. He is a corresponding editor for EOS, Campaign Coordinator for the National Science FoundationÕs Global Interaction campaign, and Executive Secretary for the International Living With a Star program. His research interests focus on the solar wind-magnetosphere interaction, in particular the bow shock and magnetopause.
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Jonathan Eastwood, THEMIS researcher, University of California at Berkeley; Dr. Jonathan Eastwood received his PhD. in Physics in 2003 from Imperial College London, UK, where he worked on the European Space Agency Cluster mission and studied the behavior and properties of the EarthÕs bow shock. Subsequently, he was a National Research Council Resident Research Associate at NASA Goddard Space Flight Center, and in 2005 moved to the Space Sciences Laboratory at UC Berkeley to work more closely on the THEMIS mission. In his research, he aims to understand the basic science that governs space weather, in particular the physics of shocks and magnetic reconnection. Since 2002 he has been author or co-author on 23 publications studying these subjects.
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