Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: LOPES 3D - vectorial measurements of radio emission from cosmic ray
  induced air showers   LOPES 3D is able to measure all three components of the electric field vector
of the radio emission from air showers. This allows a better comparison with
emission models. The measurement of the vertical component increases the
sensitivity to inclined showers. By measuring all three components of the
electric field vector LOPES 3D demonstrates by how much the reconstruction
accuracy of primary cosmic ray parameters increases. Thus LOPES 3D evaluates
the usefulness of vectorial measurements for large scale applications.

27
The categories of this paper are: comp-gas
5
The categories of this paper are: gr-qc
8
The categories of this paper are: hep-ex
9
The categories of this paper are: nlin
16
The categories of this paper are: stat
3
The categories of this paper are: physics
17
The categories of this paper are: q-fin
35
The categories of this paper are: mtrl-th
13
The categories of this paper are: quant-ph
21
The categories of this paper are: adap-org
34
The categories of this paper are: chem-ph
20
The categories of this paper are: acc-phys
30
The categories of this paper are: q-alg
22
The categories of this paper are: chao-dyn
14
The categories of this paper are: math-ph
29
The categories of this paper are: funct-an