Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Dodgeball -- Can a Satellite Avoid Being Hit by Debris?   Can a satellite dodge a collision with untracked orbiting debris? Can a
satellite dodge collision with a tracked object, making only the avoidance
man{\oe}uvers actually required to avoid collision, despite the uncertainties
of predicted conjunctions? Satellite-borne radar may distinguish actual
collision threats from the much greater number of near misses because an object
on a collision course has constant bearing, which may be determined by
interferometric detection of the radar return. A large constellation of such
radars may enable the determination of the ephemerides of all cm-sized debris
in LEO.

7
The categories of this paper are: hep-th
22
The categories of this paper are: chao-dyn
13
The categories of this paper are: quant-ph
0
The categories of this paper are: hep-ph
24
The categories of this paper are: dg-ga
15
The categories of this paper are: nucl-ex
19
The categories of this paper are: eess
8
The categories of this paper are: hep-ex
35
The categories of this paper are: mtrl-th
4
The categories of this paper are: cond-mat
33
The categories of this paper are: plasm-ph
2
The categories of this paper are: math
10
The categories of this paper are: q-bio
37
The categories of this paper are: supr-con
29
The categories of this paper are: funct-an
17
The categories of this paper are: q-fin