Magnetospherically reflected chorus waves revealed by ray tracing with CLUSTER data

0176534 - UFA-U 20030022 RIV DE eng J - Článek v odborném periodiku
Parrot, M. - Santolík, Ondřej - Cornilleau-Wehrlin, N. - Maksimovic, M. - Harvey, C. C.
Magnetospherically reflected chorus waves revealed by ray tracing with CLUSTER data.
Annales Geophysicae. Roč. 21, - (2003), s. 1111-1120. ISSN 0992-7689. E-ISSN 1432-0576
Grant CEP: GA ČR GA202/03/0832; GA MŠMT ME 650
Výzkumný záměr: CEZ:AV0Z3042911
Klíčová slova: magnetospheric physics * ionosphere * radio science
Kód oboru RIV: BL - Fyzika plazmatu a výboje v plynech
Impakt faktor: 1.031, rok: 2003

This paper is related to the propagation characteristics of a chorus emission recorded simultaneously by the 4 satellites of the CLUSTER mission on 29 October 2001 between 01:00 and 05:00 UT. During this day, the spacecraft (SC) 1, 2, and 4 are relatively close to each other but SC3 has been delayed by half an hour. We use the data recorded aboard CLUSTER by the STAFF spectrum analyser. This instrument provides the cross spectral matrix of three magnetic and two electric field components. Dedicated software processes this spectral matrix in order to determine the wave normal directions relative to the EarthŽs magnetic field. This calculation is done for the 4 satellites at different times and different frequencies and allows us to check the directions of these waves. Measurements around the magnetic equator show that the parallel component of the Poynting vector changes its sign when the satellites cross the equator region. It indicates that the chorus waves propagate away from this region which is considered as the source area of these emissions.
Trvalý link: http://hdl.handle.net/11104/0073510