Show simple item record

dc.contributor.authorKallio, Esa
dc.contributor.authorKero, Antti
dc.contributor.authorHarri, Ari-Matti
dc.contributor.authorKestilä, Antti
dc.contributor.authorAikio, Anita
dc.contributor.authorFontell, Mathias
dc.contributor.authorJarvinen, Riku
dc.contributor.authorKauristie, Kirsti
dc.contributor.authorKnuuttila, Olli
dc.contributor.authorKoskimaa, Petri
dc.contributor.authorLoyala, Jauaries
dc.contributor.authorLukkari, Juha-Matti
dc.contributor.authorModabberian, Amin
dc.contributor.authorNiittyniemi, Joonas
dc.contributor.authorRynö, Jouni
dc.contributor.authorVanhamäki, Heikki
dc.contributor.authorVarberg, Erik
dc.date.accessioned2023-01-18T12:19:09Z
dc.date.available2023-01-18T12:19:09Z
dc.date.issued2022-09-20
dc.description.abstractRadio waves provide a useful diagnostic tool to investigate the properties of the ionosphere because the ionosphere affects the transmission and properties of high frequency (HF) electromagnetic waves. We have conducted a transionospheric HF-propagation research campaign with a nanosatellite on a low-Earth polar orbit and the EISCAT HF transmitter facility in Tromsø, Norway, in December 2020. In the active measurement, the EISCAT HF facility transmitted sinusoidal 7.953 MHz signal which was received with the High frEquency rAdio spectRomEteR (HEARER) onboard 1 Unit (size: 10 × 10 × 10 cm) Suomi 100 space weather nanosatellite. Data analysis showed that the EISCAT HF signal was detected with the satellite's radio spectrometer when the satellite was the closest to the heater along its orbit. Part of the observed variations seen in the signal was identified to be related to the heater's antenna pattern and to the transmitted pulse shapes. Other observed variations can be related to the spatial and temporal variations of the ionosphere and its different responses to the used transmission frequencies and to the transmitted O- and X-wave modes. Some trends in the observed signal may also be associated to changes in the properties of ionospheric plasma resulting from the heater's electromagnetic wave energy. This paper is, to authors' best knowledge, the first observation of this kind of “self-absorption” measured from the transionospheric signal path from a powerful radio source on the ground to the satellite-borne receiver.en_US
dc.identifier.citationKallio, Kero, Harri, Kestilä, Aikio, Fontell, Jarvinen, Kauristie, Knuuttila, Koskimaa, Loyala, Lukkari, Modabberian, Niittyniemi, Rynö, Vanhamäki, Varberg. Radar—CubeSat Transionospheric HF Propagation Observations: Suomi 100 Satellite and EISCAT HF Facility. Radio Science. 2022;57(10)en_US
dc.identifier.cristinIDFRIDAID 2087236
dc.identifier.doi10.1029/2022RS007516
dc.identifier.issn0048-6604
dc.identifier.issn1944-799X
dc.identifier.urihttps://hdl.handle.net/10037/28301
dc.language.isoengen_US
dc.publisherWileyen_US
dc.relation.journalRadio Science
dc.rights.accessRightsopenAccessen_US
dc.rights.holderCopyright 2022 The Author(s)en_US
dc.rights.urihttps://creativecommons.org/licenses/by/4.0en_US
dc.rightsAttribution 4.0 International (CC BY 4.0)en_US
dc.titleRadar—CubeSat Transionospheric HF Propagation Observations: Suomi 100 Satellite and EISCAT HF Facilityen_US
dc.type.versionpublishedVersionen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


File(s) in this item

Thumbnail

This item appears in the following collection(s)

Show simple item record

Attribution 4.0 International (CC BY 4.0)
Except where otherwise noted, this item's license is described as Attribution 4.0 International (CC BY 4.0)