Instruct: Identify the main and secondary category of Arxiv papers based on the titles and abstracts
Query: Ground Experiments and Performance Evaluation of the Low-Frequency Radio
  Spectrometer Onboard the Lander of Chang'e-4 Mission   The Low-Frequency Radio Spectrometer (LFRS) is a scientific payload onboard
the Chang'e-4 lunar lander launched in December 2018. The LFRS provides in-situ
measurements of the low-frequency radio phenomena on the far-side of the Moon
for the first time in human history. To evaluate the performance of the LFRS, a
series of ground experiments are conducted using a prototype model of the LFRS.
It is not easy to perform the experiments because the EMI \footnote{
Abbreviation: EMI, Electro Magnetic Interference} from the Chang'e-4 lunar
lander itself and the environment is very intense. The results after EMI
mitigation show that the sensitivity of the LFRS may be 1e-18Wm^2Hz^-1.

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The categories of this paper are: dg-ga
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The categories of this paper are: comp-gas
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The categories of this paper are: adap-org
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The categories of this paper are: supr-con
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The categories of this paper are: q-alg
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The categories of this paper are: cmp-lg
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The categories of this paper are: alg-geom
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The categories of this paper are: econ
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The categories of this paper are: solv-int
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The categories of this paper are: physics
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The categories of this paper are: nucl-th
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The categories of this paper are: math
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The categories of this paper are: ao-sci
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The categories of this paper are: gr-qc
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The categories of this paper are: bayes-an
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The categories of this paper are: mtrl-th