Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: The revision of the turbulence profiles restoration from MASS
  scintillation indices   The altitude distribution of optical turbulence is derived from the MASS
instrument data by solving an inverse problem. In this paper, some
modifications of the profile restoration are described. The principal change is
the introduction of the Non Negative Least Squares algorithm which has good
regularizing properties. An averaging of scintillation indices was replaced
with averaging of obtained solutions what leads to clearer physical results. It
is shown that restoration with a number of turbulent layers as large as 14-15
can be successfully performed.

23
The categories of this paper are: solv-int
16
The categories of this paper are: stat
29
The categories of this paper are: funct-an
36
The categories of this paper are: cmp-lg
14
The categories of this paper are: math-ph
27
The categories of this paper are: comp-gas
22
The categories of this paper are: chao-dyn
8
The categories of this paper are: hep-ex
31
The categories of this paper are: ao-sci
7
The categories of this paper are: hep-th
20
The categories of this paper are: acc-phys
11
The categories of this paper are: hep-lat
32
The categories of this paper are: atom-ph
3
The categories of this paper are: physics
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th