Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Tomographic analysis of reflectometry data II: the phase derivative   A tomographic technique has been used in the past to decompose complex
signals in its components. The technique is based on spectral decomposition and
projection on the eigenvectors of a family of unitary operators. Here this
technique is also shown to be appropriate to obtain the instantaneous phase
derivative of the signal components. The method is illustrated on simulated
data and on data obtained from plasma reflectometry experiments in the Tore
Supra.

16
The categories of this paper are: stat
9
The categories of this paper are: nlin
25
The categories of this paper are: patt-sol
19
The categories of this paper are: eess
21
The categories of this paper are: adap-org
11
The categories of this paper are: hep-lat
33
The categories of this paper are: plasm-ph
18
The categories of this paper are: econ
15
The categories of this paper are: nucl-ex
30
The categories of this paper are: q-alg
5
The categories of this paper are: gr-qc
35
The categories of this paper are: mtrl-th
31
The categories of this paper are: ao-sci
6
The categories of this paper are: astro-ph
13
The categories of this paper are: quant-ph
37
The categories of this paper are: supr-con