@inproceedings{Edwards:2000,
author = {Edwards, TM and Balogh, A and Cowley, SWH and Dougherty, MK and Dunlop, MW and Forsyth, RJ and Laxton, NF and Staines, K},
pages = {108--111},
title = {Azimuthal field perturbations in the Jovian magnetosphere: Ulysses observations},
year = {2000}
}

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TY  - CPAPER
AB  - Azimuthal magnetic field perturbations observed by the Ulysses spacecraft during the inbound and outbound passes of the Jovian magnetosphere are compared with theoretically calculated values based on the transfer of angular momentum from the ionosphere to the magnetosphere due to departures from corotation of the magnetospheric plasma. On the inbound pass a "lagging" field configuration was observed corresponding to regions of subcorotational flow. The peak azimuthal fields were found to fall with radial distance as r -1:4. Good theoretical agreement is obtained with the observed values using a value for the Pedersen conductivity of 0:136 ± 0:028 mho. This value is smaller than the 0:4 mho obtained by Vasyliunas from the analysis of the Pioneer 10 and the Voyager 1 and 2 data. The difference is due to the larger fields observed by the latter spacecraft to which the theory was fitted. On the outbound pass the theory gives good agreement with two large "lagging" field signatures where the flow is again subcorotational. At larger distances, however, the presence of a consistently "leading" field configuration is observed which is not predicted by the theory, since the flow was still subcorotational in this region. This "leading" configuration is suggested to be due to the tail-magnetopause current system.
AU  - Edwards,TM
AU  - Balogh,A
AU  - Cowley,SWH
AU  - Dougherty,MK
AU  - Dunlop,MW
AU  - Forsyth,RJ
AU  - Laxton,NF
AU  - Staines,K
EP  - 111
PY  - 2000///
SN  - 1405-2059
SP  - 108
TI  - Azimuthal field perturbations in the Jovian magnetosphere: Ulysses observations
ER  - 

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