Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Some estimates of the source counts at Planck Surveyor frequencies,
  using the 9C survey at 15 GHz   We have used multi-frequency follow-up observations of a sample of
extragalactic sources from the 9C survey at 15 GHz to make deductions about the
expected source population at higher radio frequencies, such as those in the
lower frequency bands of the Planck Surveyor satellite. In particular, we have
made empirical estimates of the source counts at 22 GHz, 30 GHz, 43 GHz and 70
GHz and compared these with both known data and current theoretical
predictions. We have also made an estimate of the count at the ALMA frequency
of 90 GHz, with a view to assessing the possible population of point sources
available for the phase calibration of that instrument.

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The categories of this paper are: chao-dyn
3
The categories of this paper are: physics
30
The categories of this paper are: q-alg
29
The categories of this paper are: funct-an
19
The categories of this paper are: eess
18
The categories of this paper are: econ
26
The categories of this paper are: bayes-an
31
The categories of this paper are: ao-sci
35
The categories of this paper are: mtrl-th
2
The categories of this paper are: math
14
The categories of this paper are: math-ph
9
The categories of this paper are: nlin
10
The categories of this paper are: q-bio
27
The categories of this paper are: comp-gas
25
The categories of this paper are: patt-sol
32
The categories of this paper are: atom-ph