Auroral Precipita.on and HIgh La.tude Ionosphere Electrodynamics (AURORAPHILE)

(Leads: R. Robinson, Y. Zhang, B. Kosar) • WorkingTeamGoals

Toestablishquan/ta/vemeanstomeasuretheaccuracyandreliabilityofmodeledproper/esoftheauroralionosphere,includingpar/cleprecipita/on,conduc/vi/es,electricfields,neutralwinds,currents,andJoulehea/ng.•  WorkingTeamDeliverablesTheworkingteamwillestablishasetofproper/esthatdescribethestateofauroralpar/cleprecipita/onandelectrodynamics,andthenquan/fytheaccuracyandreliabilitycurrentlyachievableusingacombina/onofdataandmodels.Parametersthatspecifytheauroralionospherewillincludebothlocalandglobalquan//es.

Auroral Precipita.on and High La.tude Ionospheric Electrodynamics

HPI=HemisphericPowerIndex;JHPI=HemisphericallyIntegratedJouleHeat;CPCP=CrossPolarCapPoten/al

Metric Steps

Useallavailabledatatodeterminethebestvaluesfor•  conduc:vity

•  precipita:ngpar:cleenergyfluxelectricfields•  Currents

•  Joulehea:ng•  auroralboundaries

globallyandovertheen:redayatn-minute:meintervals.Thesedatarepresent‘groundtruth’.

SelectEvents•  9March2012•  17March2013•  21-24June2015

Selectamodel.Runthemodelusing

onlysolarwindparametersasinput.

Evaluatethemodel’sabilitytodetermineoneormoreoftheparametersinthe

groundtruthdatabase.The

modelwillreceiveasingleskillscoreforeachparameter.

Upgradethemodelandrepeat.

Connec:onsBetweenAuroralElectrodynamicParameters

EnergyFlux

ElectricField HorizontalCurrents

Joulehea:ng

Conduc:vi:es

Field-alignedCurrents

GlobalParameters HPI

Precipita/on

CrossPolarCapPoten/al

HPIJoule

Hea/ng

Magne/cIndices

+boundariesdefinedbytheseparameters

ASTRA’s Automated AMIE

DownloadMag Data

Download SuperDARN Data

ProcessMag Data

Process SuperDARN Data

Download ACE, DST, Power, KP

Data

Write AMIE infile

Run AMIE

Save data toftp server

Download DMSP Data

Download AMPERE Data

Process DMSP Data

Process AMPERE Data

AMIE-AMPERE comparison 9/7/2017 22:30 UT

Comparison of Energy Fluxes Measured by the DMSP scanning ultraviolet imager and AMPERE

ComparisonbetweenHemisphericPowerIndexfromOva/on-PRIME(blue)andfromAMPEREfield-alignedcurrents(red)

FromOstgaardetal(2002)

∝PD2

How quan.ta.ve assessments against ground-truth values will be done

• Calculateeitherone-Dortwo-Dcorrela/oncoefficient•  Shi\in/meandspacetoaccountforspa/alortemporalshi\s• Assessmentshouldonlybedoneonvalidatedground-truthdataovertheregionswherethedataarevalid• Or:UseOTSPa_ernRecogni/onSo\ware• Allgroupsshouldusethesamemethodologyformetrics-basedvalida/onassessment

Challenges

• Howtotakeintoaccountenduserrequirements• Dis/nguishingbetweenscien/ficvsopera/onsmetrics• AmbiguityofMetrics(AuroralBoundaries)• Ground-truth—Howdoweknowwhat’sright• Metricsfortwo-dimensionaldata• RingCurrent/Subauroral/REPmetrics

Next Steps •  Furthereventselec/ontakingintoaccountdataavailability•  Selectoneeventtotestmethodologyforcrea/ngaground-truthdatabase•  Selectamodelfortes/ngthetestprocedure• Runthemodelandassesstheoutputusingstandardized,quan/ta/vecomparisonmethodologies• PaperforspecialissueofSWJ