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Proposal ID Moses_4

Date of Proposal
96/04/19

name
D MOSES

institute
NRL

address
Code 7660.1
Washington DC 20375

email
moses@louis14.nrl.navy.mil

phone

fax

proposal
JOP 14

Solar Wind from Coronal Holes

The Science Objectives of this program are to:
1) Determine the mass input and energy deposition
in the solar wind for Coronal Holes

2) Distinguish between thermal models and models
requiring momentum deposition in the extended
corona.

This program centrally involves the UVCS and constitutes the
main science rational for that instrument. From the UVCS
observations, the outflow velocity should be determined
from the limb to 3 solar radii. To understand the drivers of
these processes, it is necessary to identify the state of the
corona both at the boundary with the transition region and
throughout the volume of the coronal hole. In order to
achieve this understanding, supporting observations from
LASCO, CDS, SUMER, MDI and EIT are needed.

EIT will specifically be used to determine 1)the location of
the coronal hole, 2)the emission measure and temperature of
the plasma in the coronal hole, and 3)the existance of structures
which may be associated with small scale mass input and energy
and momentum deposit. Full resolution images in each sector
over a limited region of interest will be required.

Items 1) and 2) are accomplished with the synoptic program.
Item 3) may also be accomplished by the synoptic program
depending upon the outcome of the SUMER and LASCO observations.
It is more likely that the contribution of the small scale
structure can only be understood by a fairly high time sequence
set of observations. (e.g. if XBP are a strong contributor
to mass input, then a time cadence of less than 20 minutes will be
necessary).

The cadence of one complete UVCS scan of the region of interest
is 10 hours, so there is little necessity for a dedicated EIT
high time cadence campaign if the JOP is to be run only once.
However, if it is to be run frequently, then the variation in
solar wind outflow with the variations in small scale structure
evolution would apparently provide justification for a high cadence EIT
campaign. The frequency of this JOP will be established after
the quality of the first observations is evaluated.

inside_collab
From the EIT Consortium Science Topic List of Neupert,
it would appear that half of the consortium should be
interested in this. Welcome, welcome.

consortium
yes

title
Solar Wind from Coronal Holes


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