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Significant results from 2 years of operations

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Presentation on theme: "Significant results from 2 years of operations"— Presentation transcript:

1 Significant results from 2 years of operations
THEMIS Significant results from 2 years of operations

2 Magnetic Reconnection: Explosion at 25RE
A simpler task: Distinguish Between Two Models for Substorm Onset Current Disruption: Implosion at 10RE Magnetic Reconnection: Explosion at 25RE

3 Substorm Science on THEMIS: Probe Alignments and Ground Conjunctions
Simulation: J. Raeder, UNH Visualization: Tom Bridgman, GSFC/SVS Vassilis Angelopoulos, UCLA ESS April 13, 2006

4 THEMIS Mission elements
Probe conjunctions along Sun-Earth line: 4 day recurrence over ground based observatories Ground based observatories completely cover North American sector; determine auroral breakup within 1-3s … … while THEMIS’s space-based probes determine onset of Current Disruption and Reconnection each within <10s. : Ground Based Observatory

5 TRx TAI TCD 3rd 1st 2nd 3rd 1st 2nd Timing of ground and space: Ground
(3 cameras):

6 Science Cover Story 2nd 1st 3rd Substorm Timing 1st Tail Season (2008)
Angelopoulos et al., Science, 2008 (Also: Pu et al., JGR 2009, Gabrielse et al., 2009, Liu et al., 2009, others) P2 P1 Low energy electrons High energy electrons Flow Ions 3rd 1st 2nd

7 Macroscale Interactions 2nd tail season (2009)
Dipolarization fronts link Rx site to injection fronts Self-similar structures over global scales Front of ion-inertial length in scale, kinetic in nature ~3 min 300 km/s

8 Summary 2nd 1st 3rd Inside out model Outside-In model 2nd 1st 3rd 3rd
Note: this is not the classical time sequence: Aurora brightens before near Earth dipolarization This holds true on several events considered Inside out model Outside-In model 2nd 1st 3rd 3rd 2nd 1st Aurora Reconnection Current Disruption 3rd 1st 2nd THEMIS finds:

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