Ultra-low-frequency radio astronomy observations from a Seleno-centric orbit

First results of the Longjiang-2 experiment

Journal article (2023)

Authors

Jingye Yan Chinese Academy of Sciences, National Space Science Center, University of Chinese Academy of Sciences
Ji Wu National Space Science Center, University of Chinese Academy of Sciences
L. Gurvits , Joint Institute for VLBI ERIC
Lin Wu University of Chinese Academy of Sciences, State Key Laboratory of Space Weather, Chinese Academy of Sciences, National Space Science Center
Li Deng National Space Science Center
Fei Zhao National Space Science Center
Li Zhou National Space Science Center
Ailan Lan Chinese Academy of Sciences, University of Chinese Academy of Sciences, National Space Science Center
Wenjie Fan National Space Science Center
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Copyright: © 2023 Jingye Yan, Ji Wu, L. Gurvits, Lin Wu, Li Deng, Fei Zhao, Li Zhou, Ailan Lan, Wenjie Fan, More Authors
DOI: https://doi.org/10.1007/s10686-022-09887-0
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Published Date

2023

Language

English

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Abstract

This paper introduces the first results of observations with the Ultra-Long-Wavelength (ULW) —- Low Frequency Interferometer and Spectrometer (LFIS) on board the selenocentric satellite Longjiang-2. We present a brief description of the satellite and focus on the LFIS payload. The in-orbit commissioning confirmed a reliable operational status of the instrumentation. We also present results of a transition observation, which offers unique measurements on several novel aspects. We estimate the RFI suppression required for such a radio astronomy instrumentation at the Moon-distances from Earth as order of − 80 dB. We analyse a method of separating Earth- and satellite-originated radio frequency interference (RFI). It is found that the RFI level at frequencies lower than a few MHz is smaller than the receiver noise floor.

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