Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: A Shack-Hartmann wavefront sensor projected onto the sky with reduced
  focal anisoplanatism   A method for producing a laser guide star wavefront sensor for adaptive
optics with reduced focal anisoplanatism is presented. A theoretical analysis
and numerical simulations have been carried out and the results are presented.
The technique, named SPLASH (Sky-Projected Laser Array Shack-Hartmann), is
shown to suffer considerably less from focal anisoplanatism than a conventional
laser guide star system. The method is potentially suitable for large telescope
apertures (~8m), and possibly for extremely large telescopes.

19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
23
The categories of this paper are: solv-int
7
The categories of this paper are: hep-th
32
The categories of this paper are: atom-ph
33
The categories of this paper are: plasm-ph
26
The categories of this paper are: bayes-an
3
The categories of this paper are: physics
31
The categories of this paper are: ao-sci
2
The categories of this paper are: math
11
The categories of this paper are: hep-lat
28
The categories of this paper are: alg-geom
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The categories of this paper are: adap-org
37
The categories of this paper are: supr-con
30
The categories of this paper are: q-alg
4
The categories of this paper are: cond-mat