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Feb 2 nd - Riometer Emma Spanswick & Eric Donovan The NORSTAR riometers observe three injections – each injection is seen in multiple riometers They are relatively localized (ie. they do not appear across the array) Injection #1 - ~7:40UT The only one I’m going to show (Emma ran out of time)
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Emma Spanswick & Eric Donovan
SS Injection Region
Ionospheric Observations
Magnetospheric Observations
Physical boundaries
magnetospheric models
Correlation of >30keV e- flux(for example)
Emma Spanswick & Eric Donovan
Feb 2nd - MSP
Dipolarizations
Feb 2nd - Riometer
Emma Spanswick & Eric Donovan
The NORSTAR riometers observe three injections – each injection is seen in multiple riometers
They are relatively localized (ie. they do not appear across the array)
Injection #1 - ~7:40UTThe only one I’m goingto show (Emma ran outof time)
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
What is the optical signature of the injection?
Can we track the injection region with the optics?... Basically can we use the ASIs as a large scale imaging riometer ? (for the purpose of identifying injections)
injection in riometer
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
What is the optical signature of the injection?
Can we track the injection region with the optics?... Basically can we use the ASIs as a large scale imaging riometer ? (for the purpose of identifying injections)
Using a grid size roughly equivalent to a riometer FOV
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
follow the temporal evolution of grid cells
and apply the dispersionless injectioncriteria of Spanswick
et. al 2007
The idea…
Grid cells containing more
than 100 ASI pixels
Emma Spanswick & Eric Donovan
Feb 2nd – White Light
E
WInjections:• <3min rise time• >15 minute dur.
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
Injection onset
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+30s
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
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Feb 2nd – White Light
Emma Spanswick & Eric Donovan
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Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+30s
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
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Feb 2nd – White Light
Emma Spanswick & Eric Donovan
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Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+30s
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
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Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+30s
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
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Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Emma Spanswick & Eric Donovan
+1 minute
Feb 2nd – White Light
Mapping out the injection informationwithin the grid cells using T87 – Kp2
One snapshot can be mapped out using any standard empirical model to give a general idea of what one step in this might look like in the magnetotail.
So this is certainly reasonable…
Feb 2nd – White Light
… but this is almost certainly garbage!
Emma Spanswick & Eric Donovan
SS Injection Region
Ionospheric Observations
Magnetospheric Observations
Physical boundaries
magnetospheric models
Correlation of >30keV e- flux(for example)
riometer
white light ASI
MSI
MSP
GMAGs
SST
ESA
FGM
IC
Feb 2nd – Injection
Emma Spanswick & Eric Donovan
Feb 2nd – Injection
Emma Spanswick & Eric Donovan
THEMIS Science Meeting – March 18th 2008
Mapping Questions
Emma Spanswick & Eric Donovan
We have previously found (with riometers and CRRES) that the correlation between integrated electron flux above 30keV and riometer absorption could be used to infer something about satellite mapping..
What are the right in situ quantities to do this with and what is the right scale size??
Can the combined information from riometers / MSPs / NORSTAR-MSIshelp determine satellite mapping for THEMIS??
Feb 2nd – Injection
Emma Spanswick & Eric Donovan
More needs to be done….
Where are these injection in the CPS??
Using the THEMIS–ASI , NORSTAR-MSP, NORSTAR– MSI, we can place the onset of injection relative to the proton/electron auroral boundaries (location in CPS)
Meaningfully map the time sequence to the equatorial plane
Correlate transient signatures from THEMIS ESA and the white light and multi-spectral ASIs
Use event-specific empirical model adjusted as best as possible to give a time evolving mapping.
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