Observations of HF-induced instability in the auroral E region
2013 (English)In: Annales Geophysicae, ISSN 0992-7689, E-ISSN 1432-0576, Vol. 31, no 6, 1103-1108 p.Article in journal (Refereed) Published
Enhancements were observed in backscattered radar power during an ionospheric heating experiment from two distinct altitude regions in the auroral E region above Tromso. For the experiment the EISCAT Tromso heater was operated with O mode and X mode alternated at 4.04 MHz, close to the 3rd electron gyroharmonic. Ion-line data recorded with the EISCAT UHF radar reveal different temporal evolutions as well as different ion-line characteristics for the enhancements from the two altitude regions. The upper layer is dominated by a strong central feature, whereas the lower layer has three peaks corresponding to the central feature and the two ion lines. The altitude region of the two closely spaced (altitude separation similar to 5 km) but distinct enhancements is close to the critical altitude for the heater wave.
Place, publisher, year, edition, pages
2013. Vol. 31, no 6, 1103-1108 p.
Ionosphere, active experiments
Earth and Related Environmental Sciences
IdentifiersURN: urn:nbn:se:kth:diva-116668DOI: 10.5194/angeo-31-1103-2013ISI: 000322290400009ScopusID: 2-s2.0-84895810969OAI: oai:DiVA.org:kth-116668DiVA: diva2:599841
FunderSwedish Research Council
QC 20130830. Updated from manuscript to article in journal.
Previous title: Studies of HF induced instabilities in the auroral E-region2013-01-242013-01-222013-08-30Bibliographically approved