IRF
IRF Uppsala
RPF programme
IRF-U Staff
Seminars
Courses
PhD studies
Examensarbete
Workshops
Cluster
...EFW
...Quicklook
Cassini
Rosetta
Solar Orbiter
Intranet
| INSTITUTET FÖR RYMDFYSIK | UPPSALA |
 |
|
| Swedish Institute of Space Physics | (59°50.272′N, 17°38.786′E) |
Student project (master level, 15c)/Studentprojekt (masternivå, 15c)
Atmospheric Gravity Waves Revisited with the EISCAT Radar
Student: Tatsuya Hirabayashi, Uppsala University and Tohoku UniversitySupervisor: Stephan Buchert
Period: Spring 2023
Abstract
Atmospheric gravit waves (AGWs) strongly interact with Traveling Ionospheric Disturbances (TIDs, e.g. Kirchengast et al., 1996). Vlasov et al.(2011) presented a statistical study of AGWs-TIDs events with the EISCAT dataset, which we follow-up in this project. Our goals are to discuss statistically AGW-TID features and properties such as the amplitude, the dominant frequency, and frequency of the events in relation to external factors like magnetic activity. We succeeded to project AGW-TID features with a Butterworth filter for datasets from 6 September 1988, 11 November 2018, and 2 March 2022. However, in the projection process, we found several problems worth to discuss further. We show examples of the projections, discuss difficulties and problems encountered and suggest possible solutions of these issues.Results
![[Eiscat Kiruna]](../../img/eiscat-kiruna-lgv-1920x1280.jpg)
The EISCAT Kiruna UHF radar [image credit: Lars-Göran Vanhainen/IRF/EISCAT]