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Derivation of a Self-Consistent Auroral Oval Model Using the Auroral Boundary Index (Paperback)
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Derivation of a Self-Consistent Auroral Oval Model Using the Auroral Boundary Index (Paperback)
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The position and intensity of the auroral oval has many
implications for the Air Force from determining the effects of
incoming electron flux on DoD systems to modeling the ionosphere to
exploit current HF communications capabilities. The auroral
morphology is a good indicator of the level at which space weather
and its near-Earth consequences are occurring, and thus it is
important to develop an auroral prediction model. However, since no
purely physics-based models exist to describe the temporal and
spatial evolution of the auroral zone, space weather practitioners
and researchers are forced to produce statistical representations,
"organized" by some relevant geophysical parameter. Currently, the
most widely used model is the Hardy et al. (1985) auroral oval
model, which is binned according to the Kp index. The Kp index is a
mid-latitude measure of planetary geomagnetic activity, and was
presumed to be well-correlated to the size and shape of the auroral
region. However, subsequent research has shown that Kp is probably
not the best binning parameter. This study used the Auroral
Boundary Index (ABI) to parameterize the statistics of the auroral
oval location since it is a measurement of the electron fluxes
computed directly from sensors aboard the DMSP satellites. Thus,
the current work represents a move toward a more
self-consistent--and presumably more accurate--climatological
representation of the auroral oval boundaries. This was
accomplished by recreating the process performed by Hardy et al.,
substituting the ABI for the Kp index and deriving an entirely new
set of auroral ovals based on almost 11 years of DMSP data from the
F8 and F9 satellites. To quantitatively assess the differences
between the two models, electron flux values were compared to
actual DMSP data of individual satellite passes. Preliminary
findings suggest that the new ABI auroral oval model is, at worst,
comparable to the results achieved by Hardy et al. Further
refinement of this n mode
General
Imprint: |
Biblioscholar
|
Country of origin: |
United States |
Release date: |
September 2012 |
First published: |
September 2012 |
Authors: |
Keith A. Anderson
|
Dimensions: |
246 x 189 x 6mm (L x W x T) |
Format: |
Paperback - Trade
|
Pages: |
114 |
ISBN-13: |
978-1-249-45015-3 |
Categories: |
Books >
Social sciences >
Education >
General
|
LSN: |
1-249-45015-2 |
Barcode: |
9781249450153 |
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