Bauer, TM;
Dunlop, MW;
Sonnerup, BUO;
Sckopke, N;
Fazakerley, AN;
Khrabrov, AV;
(2000)
Dual spacecraft determinations of magnetopause motion.
Geophysical Research Letters
, 27
(13)
1835 - 1838.
10.1029/2000GL000041.
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Abstract
We examine the motion of Earth's magnetopause for 16 dawnside traversals of this boundary by the sister spacecraft AMPTE/UKS and IRM in December, 1984, when their separation was 400-900 km. We compare magnetopause normal vectors, n, and speeds of motion, u(n), obtained separately from each spacecraft by use of three different methods, and also compare those u(n) to corresponding speeds, u(n)*, obtained from observed time lags between the two spacecraft. Agreement between u, values and n vectors determined from the three methods ranges from poor to excellent. Comparing u(n)* and u(n) values, we find a clear tendency for \ u(n)*\ to be larger than \ u(n)\: While slightly less than half of the results show reasonable agreement (0.5 < u(n)/u(n)* < 2), there are about as many results in the range 0 < u(n)/u(n)* < 0.5, and a few cases give the wrong sign of u(n).
Type: | Article |
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Title: | Dual spacecraft determinations of magnetopause motion |
Open access status: | An open access version is available from UCL Discovery |
DOI: | 10.1029/2000GL000041 |
Publisher version: | http://dx.doi.org/10.1029/2000GL000041 |
Language: | English |
Additional information: | Copyright 2000 by the American Geophysical Union |
Keywords: | Minimization, Residue, Layer |
UCL classification: | UCL UCL > Provost and Vice Provost Offices UCL > Provost and Vice Provost Offices > UCL BEAMS UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Maths and Physical Sciences > Dept of Space and Climate Physics |
URI: | https://discovery.ucl.ac.uk/id/eprint/165363 |
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