GEM Laundry list of magnetic mapping science questions
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TimestampScience Question Listed ByWhy does this science question require magnetic mapping?
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11/21/2011 14:53:44Under what circumstances is the assumption of equipotential magnetic field lines valid or invalid?Joseph BakerSee technique listing by Baker
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11/21/2011 23:09:49What causes the auroral arc?Eric DonovanAuroral arcs are on field lines that thread the CPS. They exist poleward of the ion IB, but equatorward of the OCB. Their alignment and relation to other magnetotail phenomena indicate the structure is imposed from the magnetotail - but imposed by what? Further, evidence is increasing that arcs map to low-B regions in the neutral sheet, so that mapping is problematic. There is a great need for accurate mapping of arcs in order to relate arcs to specific magnetotail features (e.g., gradients, but gradients of what?). It is unlikely that empirical models will be useful in this.

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11/27/2011 19:25:32How magnetospheric phenomena mapped down to the ionosphere can be compared at different magnetic local times?Vladimir PapitashviliAs two (or more) spacecraft located at different local times (e.g., midnight and down meridians) but along same L-shell in the magnetosphere measure some phenomena... and their respective ionospheric-based features could be captured via a prefect mapping technique that uses one of the best existing magnetospheric field models. Currently, the mapping results (expressed in their geographical coordinates) can only be compared via the classical Corrected Geomagnetic Coordinates and Magnetic Local Time system, calculated using only the IGRF. Something else (and better) is need to organize the mapping results at the ground or ionospheric level.
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11/28/2011 18:56:32Can we get a real-time map of the magnetospheric plasma wave environment from ground photometric observations?Jacob BortnikMagnetospheric plasma waves are a crucial component in the acceleration and precipitation of radiation belt electrons, but obtaining a global map of such waves in real time using satellites is virtually impossible. Fortunately, ground-based photometers detect the precipitation signature from a variety of waves and this precipitation is fairly well understood. All that remains is to map the photometric precipitation signature of the waves back into space using accurate magnetic mapping techniques (I believe the saying goes "the devil is in the details").
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11/28/2011 19:36:16What is the effect of substorm dipolarization on auroral morphology? Tom MooreDuring a substorm with dipolarization, the "lens" through which magnetospheric processes are imaged on the ionosphere is altered substantially, distorting the image in a time dependent fashion. Without knowing the mapping before, during, and after, we cannot readily interpret the auroral imagery in terms of its source regions at high altitude. Knowing the mapping, we may be able to improve our inferences.
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12/1/2011 10:06:40Can empirical magnetic field models result in enough ion strong pitch angle scattering in the plasma sheet to account for the ion precipitation observed in the ionosphere?Chih-Ping Wang, Sorin Zaharia(Liz's note, get more explanation, I don't understand)
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12/1/2011 13:00:26Under what conditions does the plasmapause map to a corresponding density gradient in the ionosphere?Jerry GoldsteinFairly obvious. (Liz's notes: Has this been tried? Why not? Could it be tried? Is this a more 'answerable' question than some of the others?)
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12/1/2011 13:02:50What is the relationship between the motion of auroral forms and the motion of plasmas in the tail? When is there a one-to-one correspondence?Jerry Goldsteinsimilar to Jacob's question.
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12/2/2011 17:00:10How well can ground based magnetometers be used to map the magnetopause location provided variations along the dayside magnetopause boundary?Drew TurnerMany interesting phenomena result in dayside magnetopause motion, including FTEs, solar wind pressure pulses, and transient foreshock events (hot flow anomalies, foreshock bubbles, etc). These variations can have localized and global magnetospheric impacts. It would be interesting to compare mapping with advanced magnetospheric models to observations of magnetic impulse events (MIEs), which are signatures of magnetopause motion in ground based magnetometers, to determine 1) how accurate the model mapping is and 2) how effective the MIEs in the ground-based observations alone are at determining the boundary location. (liz's note: get some references on this?)
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12/3/2011 15:51:51To assess magnetic connectivity between different regions in the magnetosphere, to correlate spacecraft measurements with ground-based observations, and to provide global magnetic fields needed for energetic particle drift motion studiesChia-Lin Huang(Liz's note, can I rewrite this more specifically? see below)
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Under what magnetic field configurations can magnetopause shadowing create significant losses of relativistic electrons? Liz for Chia-Lin HuangSee technique listing by Huang
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Under what geophysical conditions do empirical magnetic field models accurately predict field strength and direction at GEO (as compared to GOES observations)? Liz for Chia-Lin HuangRefer to paper by Huang. Systematic assessment of various models under various conditions possible at GEO.
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11/15/2011What causes diffuse (patchy pulsating, etc.) aurora?Eric Donovan
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11/15/2011What magnetospheric dynamic process(es) do PBIs and streamers correspond to?Eric Donovan
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11/15/2011Do all BBFs have an ionospheric signature?Eric Donovan
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11/15/2011What are the ionospheric signatures of magnetic reconnection (cusp, OCB, NER)?Eric Donovan
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11/15/2011What magnetotail instability or instabilities correspond to substorm onset?Eric Donovan
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11/15/2011How can we use ionospheric observations of EMIC wave signatures to explore their role in geospace dynamics?Robyn Millan
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11/15/2011How can we connect measurement of precipitation with in situ measurements near the equator to try to quantify the scattering mechanisms and loss rates of relativistic electrons?Robyn Millan
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11/15/2011How does the ionospheric convection pattern relate to magnetospheric convection?Eric Donovan
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11/15/2011How do field-aligned currents close in the magnetosphere?Eric Donovan
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11/15/2011How are field-aligned currents generated?Eric Donovan
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11/15/2011Why are aurora sometimes conjugate and sometimes not?Eric Donovan
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11/15/2011What are the ionospheric signatures of sudden topological reconfigurations (SIs, onset, etc.)Eric Donovan
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