Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Near real-time telecommand solutions for CubeSats: State of the art and
  applications to the SkyHopper mission   Cubesats and similarly scaled nano-satellites present significant
opportunities for hosting both scientific and commercial payloads for Earth
sensing and astronomical observations, in particular in the area of
rapid-response observations to external triggers. However, one limiting factor
to full exploitation of the CubeSat potential in this area lies in the
traditional approach of ground-spacecraft communications, which is based on
infrequent contact via a limited network of ground stations. An alternative is
to leverage existing commercial machine-to-machine orbital networks to transmit
the triggers in near-real-time. Here, we present an analysis framework for
calculating the likelihood of a time to first contact and the length of contact
under minimum guaranteed conditions for these networks. The analysis is then
extended to likely operational conditions in orbit, and the results of a
comparative trade study of a number of orbital networks are presented, with an
emphasis on the applicability to the SkyHopper Space Telescope CubeSat, a
nanosatellite astronomical observatory currently undergoing preliminary design.
It was found that near-real- time telecommands could be transmitted to
SkyHopper within 10min with a likelihood of 62% using the Globalstar network,
or a likelihood of 74% using the Iridium network, under predicted nominal
operational conditions in orbit. Future networks currently under development
could improve these figures to reach greater than 98% coverage with a one
second latency.

31
The categories of this paper are: ao-sci
4
The categories of this paper are: cond-mat
29
The categories of this paper are: funct-an
12
The categories of this paper are: nucl-th
0
The categories of this paper are: hep-ph
14
The categories of this paper are: math-ph
37
The categories of this paper are: supr-con
36
The categories of this paper are: cmp-lg
16
The categories of this paper are: stat
10
The categories of this paper are: q-bio
34
The categories of this paper are: chem-ph
26
The categories of this paper are: bayes-an
28
The categories of this paper are: alg-geom
22
The categories of this paper are: chao-dyn
30
The categories of this paper are: q-alg
3
The categories of this paper are: physics