Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Recent Developments in Helioseismic Analysis Methods and Solar Data
  Assimilation   We review recent advances and results in enhancing and developing
helioseismic analysis methods and in solar data assimilation. In the first part
of this paper we will focus on selected developments in time-distance and
global helioseismology. In the second part, we review the application of data
assimilation methods on solar data. Relating solar surface observations as well
as helioseismic proxies with solar dynamo models by means of the techniques
from data assimilation is a promising new approach to explore and to predict
the magnetic activity cycle of the Sun.

16
The categories of this paper are: stat
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
21
The categories of this paper are: adap-org
32
The categories of this paper are: atom-ph
31
The categories of this paper are: ao-sci
26
The categories of this paper are: bayes-an
5
The categories of this paper are: gr-qc
13
The categories of this paper are: quant-ph
14
The categories of this paper are: math-ph
33
The categories of this paper are: plasm-ph
30
The categories of this paper are: q-alg
0
The categories of this paper are: hep-ph
3
The categories of this paper are: physics
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess