Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Astrometric observations of a near-Earth object using the image fusion
  technique   The precise astrometric observation of small near-Earth objects (NEOs) is an
important observational research topic in the astrometric discipline, which
greatly promotes multidisciplinary research, such as the origin and evolution
of the solar system, the detection and early warning of small NEOs, and
deep-space navigation. The characteristics of small NEOs, such as faintness and
fast moving speed, restrict the accuracy and precision of their astrometric
observations. In the paper, we present a method to improve the accurate and
precise astrometric positions of NEOs based on image fusion technique. The
noise analysis and astrometric test from the observed images of the open
cluster M23 are given. Using the image fusion technique, we obtain the sets of
superimposed images and original images containing reference stars and moving
targets respectively. The final fused image set includes background stars with
high signal-to-noise ratios and ideal NEO images simultaneously and avoids the
saturation of background stars. Using the fused images, we can reduce the
influence of telescope tracking and NEO ephemeris errors on astrometric
observations, and our results indicate that the accuracy and precision of NEO
Eros astrometry are improved obviously after we choose suitable image fuse
mode.

3
The categories of this paper are: physics
19
The categories of this paper are: eess
0
The categories of this paper are: hep-ph
32
The categories of this paper are: atom-ph
1
The categories of this paper are: cs
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
22
The categories of this paper are: chao-dyn
34
The categories of this paper are: chem-ph
12
The categories of this paper are: nucl-th
35
The categories of this paper are: mtrl-th
17
The categories of this paper are: q-fin
4
The categories of this paper are: cond-mat
13
The categories of this paper are: quant-ph
8
The categories of this paper are: hep-ex
18
The categories of this paper are: econ