Print Email Facebook Twitter Ultra-low-frequency radio astronomy observations from a Seleno-centric orbit Title Ultra-low-frequency radio astronomy observations from a Seleno-centric orbit: First results of the Longjiang-2 experiment Author Yan, Jingye (Chinese Academy of Sciences; National Space Science Center; University of Chinese Academy of Sciences) Wu, Ji (National Space Science Center; University of Chinese Academy of Sciences) Gurvits, L. (TU Delft Astrodynamics & Space Missions; Joint Institute for VLBI ERIC) Wu, Lin (State Key Laboratory of Space Weather; Chinese Academy of Sciences; National Space Science Center; University of Chinese Academy of Sciences) Deng, Li (National Space Science Center) Zhao, Fei (National Space Science Center) Zhou, Li (National Space Science Center) Lan, Ailan (Chinese Academy of Sciences; National Space Science Center; University of Chinese Academy of Sciences) Fan, Wenjie (National Space Science Center) Date 2023 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. Subject DSLFLISInterferometric radiometerLongjiang-2Lunar orbitRadio astronomySatellite arrayUltra-low frequencies To reference this document use: http://resolver.tudelft.nl/uuid:bb98e55c-59ff-412c-af06-30e517dfa6a8 DOI https://doi.org/10.1007/s10686-022-09887-0 Embargo date 2024-09-02 ISSN 0922-6435 Source Experimental Astronomy: an international journal on astronomical instrumentation and data analysis, 56 (1), 333-353 Bibliographical note Green Open Access added to TU Delft Institutional Repository ‘You share, we take care!’ – Taverne project https://www.openaccess.nl/en/you-share-we-take-care Otherwise as indicated in the copyright section: the publisher is the copyright holder of this work and the author uses the Dutch legislation to make this work public. Part of collection Institutional Repository Document type journal article Rights © 2023 Jingye Yan, Ji Wu, L. Gurvits, Lin Wu, Li Deng, Fei Zhao, Li Zhou, Ailan Lan, Wenjie Fan, More Authors Files file embargo until 2024-09-02