Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Systematic Characterization of Low Frequency Electric and Magnetic Field
  Data Applicable to Solar Orbiter   We present a systematic and physically motivated characterization of
incoherent or coherent electric and magnetic fields, as measured for instance
by the low frequency receiver on-board the Solar Orbiter spacecraft. The
characterization utilizes the 36 auto/cross correlations of the 3+3 complex
Cartesian components of the electric and magnetic fields; hence, they are
second order in the field strengths and so have physical dimension energy
density. Although such 6x6 correlation matrices have been successfully employed
on previous space missions, they are not physical quantities; because they are
not manifestly space-time tensors. In this paper we propose a systematic
representation of the 36 degrees-of-freedom of partially coherent
electromagnetic fields as a set of manifestly covariant space-time tensors,
which we call the Canonical Electromagnetic Observables (CEO). As an example,
we apply this formalism to analyze real data from a chorus emission in the
mid-latitude magnetosphere, as registered by the STAFF-SA instrument on board
the Cluster-II spacecraft. We find that the CEO analysis increases the amount
of information that can be extracted from the STAFF-SA dataset; for instance,
the reactive energy flux density, which is one of the CEO parameters,
identifies the source region of electromagnetic emissions more directly than
the active energy (Poynting) flux density alone.

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The categories of this paper are: hep-ph
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The categories of this paper are: stat
30
The categories of this paper are: q-alg
15
The categories of this paper are: nucl-ex
26
The categories of this paper are: bayes-an
32
The categories of this paper are: atom-ph
28
The categories of this paper are: alg-geom
23
The categories of this paper are: solv-int
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The categories of this paper are: q-fin
37
The categories of this paper are: supr-con
19
The categories of this paper are: eess
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
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The categories of this paper are: comp-gas
31
The categories of this paper are: ao-sci
8
The categories of this paper are: hep-ex