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Kwon, Jung-Hyuk;Oh, Seung-Hyun;Seo, Byung-Il;Lee, Wang-Sang
- Journal of Aerospace System Engineering
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- v.16 no.2
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- pp.39-48
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- 2022
The purpose of this paper was to study how to improve the occurrence of abnormal altitude values of radio altimeter, due to RF interference signals during the flight of aircraft. In flight missions, since it performs a roll-out after several high maneuvers, accurate altitude must be displayed to effectively perform flight missions. Thus, a root cause analysis and trouble shooting were performed for the display of abnormal altitude values of radar altimeters, and a method of reducing RF interference signals by installing an attenuator was examined. Additionally, the verification results for the improvements are also described.
https://doi.org/10.20910/JASE.2022.16.2.39 인용 PDF KSCI

Guee Won, Moon;Cheol Hea, Koo;Seongyun, Lee;In Hoi, Koo;Sang Il, Ahn
- Journal of Aerospace System Engineering
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- v.16 no.6
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- pp.81-89
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- 2022
This study measured the radio environment of 10 domestic institutions with CubeSat ground stations for 24 hours in three frequency bands (VHF/UHF/S-band) allocated by the International Telecommunication Union (ITU). The impact of the RF environment around the ground stations on CubeSat downlink frequencies was analysed and compared with acceptable interference noise requirements from the CubeSat RF link. The findings indicate that not only the selection of downlink frequency but also the configuration of RF communication link design and ground station system of CubeSat should consider the S-band RF environment around the ground station due to the presence of several wireless devices.
https://doi.org/10.20910/JASE.2022.16.6.81 인용 PDF KSCI