@inproceedings{Liu:2006,
author = {Liu, Y and Liu, R and Fraser, BJ and Ables, ST and Xu, Z and Zhang, B and Shi, J and Liu, Z and Huang, D and Hu, Z and Chen, Z and Xiao, W and Dunlop, M and Balogh, A},
pages = {351--356},
title = {Observation of PC 3/5 magnetic pulsations around the cusp at mid altitude},
year = {2006}
}

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TY  - CPAPER
AB  - Since launched in year 2000 the Cluster mission has passed the region around the cusp at mid-altitude (∼6Re) for many times, where ULF wave activities are rich in. From 0800 to 1300UT on October 30 2002 the Cluster spacecrafts ran along an orbit of southern cuspplasmasphere-northern cusp that provides an excellent observation of ULF waves in dayside magnetosphere. Flux gate magnetometer (FGM) data in the GSE system from the spacecrafts were transformed in a field aligned coordinated system, and the results showed that in the equatorial side of the cusp existed plenty of narrow band ULF waves in Pc3-5 range. The frequency band of the ULF waves is confined in narrow Pc5 band near the cusp and evolved into Pc3 band when the spacecrafts went to about L-5 where the plasmasphere is situated. This is consistent with the geomagnetic field line resonance (FLR) theory. However, in the cusp region only broadband waves were observed, which seem to be a magnetosheath-like turbulence due to that the cusp is located in the open field line area where the condition to excite FLR does not be satisfied but plasma disturbance from upstream solar wind is allowed to come into. By this way, a clear wave boundary of the cusp is identified, that is, the transferring position from the broadband waves to the narrow band waves is the right boundary of open field lines to the closed ones.
AU  - Liu,Y
AU  - Liu,R
AU  - Fraser,BJ
AU  - Ables,ST
AU  - Xu,Z
AU  - Zhang,B
AU  - Shi,J
AU  - Liu,Z
AU  - Huang,D
AU  - Hu,Z
AU  - Chen,Z
AU  - Xiao,W
AU  - Dunlop,M
AU  - Balogh,A
EP  - 356
PY  - 2006///
SN  - 0379-6566
SP  - 351
TI  - Observation of PC 3/5 magnetic pulsations around the cusp at mid altitude
ER  - 

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