| 1. |
- Danielides, M. A., et al.
(författare)
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Measurement of Auroral characteristics by Auroral Turbulence II sounding rocket
- 1999
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Ingår i: Geophysica. - 0367-4231 .- 2324-0741. ; 35:1-2, s. 33-44
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Tidskriftsartikel (refereegranskat)abstract
- The Auroral Turbulence II sounding rocket was launched into a moderately active night-side aurora from the Poker Flat Research Range, Alaska, US. This unique three payload rocket experiment contained both electric and magnetic field, and particle instruments, which provided three point measurements over a wide range of scales. The payloads passed through several auroral arcs providing details of the auroral fine structure and the three point measurements allowed the distinction of spatial and temporal variations. The rocket data are compared with optical observations with special emphasis on a large quiet arc traversed in the middle of the flight. The observed features and field-aligned current densities are found to agree with earlier studies.
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| 2. |
- Ivchenko, Nickolay, et al.
(författare)
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Quasiperiodic oscillations observed at the edge of an auroral arc by Auroral Turbulence 2
- 1999
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Ingår i: Geophysical Research Letters. - 0094-8276 .- 1944-8007. ; 26:22, s. 3365-3368
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Tidskriftsartikel (refereegranskat)abstract
- The Auroral Turbulence II (AT2) sounding rocket carried three payloads into the auroral ionosphere where they crossed several are structures. At the border of an auroral are a quasiperiodic structure was observed by the magnetic and electric field instruments as well as by the particle detectors. The variations were temporal oscillations, but existed only in a narrow (approximate to 7 km) region transverse to the are, with a correlation length along the are of at least several km. The relation between the electric and magnetic field amplitude indicates the Alfvenic nature of the variations. Field aligned electron precipitation is correlated to the field variations. The narrow band nature of the oscillations and frequency around 0.6 Hz is consistent with waves confined in the ionospheric Alfven resonator.
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| 3. |
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