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

IF 2.7 3区物理与天体物理 Q2 ASTRONOMY & ASTROPHYSICS Experimental Astronomy Pub Date : 2023-01-27 DOI:10.1007/s10686-022-09887-0

Jingye Yan, Ji Wu, Leonid I. Gurvits, Lin Wu, Li Deng, Fei Zhao, Li Zhou, Ailan Lan, Wenjie Fan, Min Yi, Yang Yang, Zhen Yang, Mingchuan Wei, Jinsheng Guo, Shi Qiu, Fan Wu, Chaoran Hu, Xuelei Chen, Hanna Rothkaehl, Marek Morawski

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引用次数: 2

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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以硒为中心轨道的超低频率射电天文观测

本文介绍了硒心卫星龙江二号上超长波长(ULW)低频干涉仪和光谱仪(LFIS)首次观测结果。我们对卫星进行了简要描述，并重点介绍了LFIS有效载荷。在轨调试确认了仪器的可靠运行状态。我们还提出了一个过渡观测的结果，它提供了几个新方面的独特测量。我们估计这种射电天文仪器在距离地球月球的距离上所需的RFI抑制为- 80 dB。分析了一种分离地球源和卫星源射频干扰(RFI)的方法。研究发现，在低于几兆赫的频率下，RFI电平小于接收机的本底噪声。

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来源期刊

Experimental Astronomy 地学天文-天文与天体物理

CiteScore

5.30

自引率

3.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Many new instruments for observing astronomical objects at a variety of wavelengths have been and are continually being developed. Furthermore, a vast amount of effort is being put into the development of new techniques for data analysis in order to cope with great streams of data collected by these instruments. Experimental Astronomy acts as a medium for the publication of papers of contemporary scientific interest on astrophysical instrumentation and methods necessary for the conduct of astronomy at all wavelength fields. Experimental Astronomy publishes full-length articles, research letters and reviews on developments in detection techniques, instruments, and data analysis and image processing techniques. Occasional special issues are published, giving an in-depth presentation of the instrumentation and/or analysis connected with specific projects, such as satellite experiments or ground-based telescopes, or of specialized techniques.