Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Measurement requirements for a near-Earth asteroid impact mitigation
  demonstration mission   A concept for an Impact Mitigation Preparation Mission, called Don Quijote,
is to send two spacecraft to a Near-Earth Asteroid (NEA): an Orbiter and an
Impactor. The Impactor collides with the asteroid while the Orbiter measures
the resulting change in the asteroid's orbit, by means of a Radio Science
Experiment (RSE) carried out before and after impact. Three parallel Phase A
studies on Don Quijote were carried out for the European Space Agency: the
research presented here reflects outcomes of the study by QinetiQ. We discuss
the mission objectives with regards to the prioritisation of payload
instruments, with emphasis on the interpretation of the impact. The Radio
Science Experiment is described and it is examined how solar radiation pressure
may increase the uncertainty in measuring the orbit of the target asteroid. It
is determined that to measure the change in orbit accurately a thermal IR
spectrometer is mandatory, to measure the Yarkovsky effect. The advantages of
having a laser altimeter are discussed. The advantages of a dedicated
wide-angle impact camera are discussed and the field-of-view is initially sized
through a simple model of the impact.

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The categories of this paper are: hep-ph
33
The categories of this paper are: plasm-ph
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
20
The categories of this paper are: acc-phys
18
The categories of this paper are: econ
28
The categories of this paper are: alg-geom
35
The categories of this paper are: mtrl-th
15
The categories of this paper are: nucl-ex
5
The categories of this paper are: gr-qc
19
The categories of this paper are: eess
2
The categories of this paper are: math
17
The categories of this paper are: q-fin
1
The categories of this paper are: cs
11
The categories of this paper are: hep-lat
26
The categories of this paper are: bayes-an