Electric fields and large-scale undulations in the evening sector of the diffuse auroral zone |
| |
| Authors: | D G Baishev E S Barkova A E Stepanov F Rich K Yumoto |
| |
| Institution: | 1.Yu.G. Shafer Institute of Cosmophysical Research and Aeronomy, Siberian Branch,Russian Academy of Sciences,Yakutsk,Russia;2.Hanscom Air Force Base,Air Force Research Laboratory,Massachusetts,USA;3.Space Environment Research Center,Kyushu University,Fukuoka,Japan |
| |
| Abstract: | The synchronous observations of strong electric fields and large-scale undulations observed on December 12, 2004, in the evening
sector of the diffuse auroral zone 0900-1000 UT (~1700-1800 MLT) have been analyzed. The appearance of strong northward electric
field at ~0900 UT was almost simultaneously registered at Tixie Bay ionospheric station (71.6° N, 128.9° E, L =, 5.6) and on the DMSP F15 satellite. At 0910-1000 UT, the all-sky TV camera at Tixie Bay and the DMSP satellites (F13, F14,
and F15) registered eight undulations propagating westward at a velocity of 0.7—0.8 km/s. The undulation parameters registered
during the TV observations agree with the satellite measurements. The distinctive feature of the analyzed event consists in
that an intense electric field and undulations were localized within the diffuse zone in the region of increased precipitation
of keV electrons. A comparison of the ground-based and satellite measurements made it possible to draw the conclusion on the
necessary conditions for formation of diffuse undulations. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
