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Proposal ID Neupert_8

Date of Proposal
96/05/24

name
Werner M. Neupert

institute
NOAA

address
Code R/E/SE, SEC/NOAA, 325 Broadway,
Boulder, CO 80303

email
wneupert@selntsvr1.noaa.gov

phone
(303) 497-3274

fax
(303)497-3645

proposal
Title: "Correlation of EUV Emission of Spatially Resolved
Structures with Ground-based Observations"

EIT Keywords: EUV proxies; Active region source modeling

Proposal: We propose to assemble and compare the emission
characteristics of coronal active regions and other
observable coronal features and to evaluate whether such
characteristics can be characterized by visible signatures
such as associated sunspot type, magnitude, complexity, and
evolution of the underlying photospheric magnetic field, and
area and the extent and brightness of associated Ca II K .
Correlation with microwave emission and other signatures
will be made if appropriate data are available.

Attention will be paid to EUV-emitting regions not obviously
associated with active regions as EUV emission from weak
coronal features contributes a relatively greater fraction
of the EUV flux in a spectral line as temperature of
formation of the line decreases.

The purpose of this study is two-fold: a.) The
characterization of EUV emission in terms of ground-based
observables may lead to development of better proxies for
the solar EUV spectrum; b.) The characterization of EUV
emission can lead to evaluation of the radiative loss
function of coronal loops or other coronal features, a
quantity that is needed for studies of the energy balance
and heating of the corona.



EIT Data Required: EIT data sets from all four wavelengths
are required. Synoptic EIT data sets will suffice for
characterizing the long-term evolution of EUV emission of
trackable regions. As solar activity increases, EIT
observations of active regions taken in near-synchronism
with ground-based observations will be needed to assure that
comparisons are not distorted by transient activity. To
accomplish synchronism with the least impact on the total
EIT telemetry down-link budget, we will select specific
blocks of the EIT image for transmission to the ground.

EIT Consortium collaborators: R. Catura; J. Gurman

External Collaborators: Ground-based Observers, TBD

inside_collab

consortium
yes

title
Correlation of EUV Emission of Spatially Resolved
Structures with Ground-based Observations


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