Time-varying magnetotail magnetic flux calculation: a test of the method
We modified the Petrinec and Russell (1996) algorithm to allow the computation of time-varying magnetotail magnetic flux based on simultaneous spacecraft measurements in the magnetotail and near-Earth solar wind. In view of many assumptions made we tested the algorithm against MHD simulation in...
| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
Copernicus Publications
2009-04-01
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| Series: | Annales Geophysicae |
| Online Access: | https://www.ann-geophys.net/27/1583/2009/angeo-27-1583-2009.pdf |
| Summary: | We modified the Petrinec and Russell (1996) algorithm to allow the
computation of time-varying magnetotail magnetic flux based on simultaneous
spacecraft measurements in the magnetotail and near-Earth solar wind. In
view of many assumptions made we tested the algorithm against MHD simulation
in the artificial event, which provides the input from two artificial
spacecraft to compute the magnetic flux F values with our algorithm; the
latter are compared with flux values, obtained by direct integration in the
tail cross-section. The comparison shows similar time variations of
predicted and simulated fluxes as well as their good correlation (<I>cc</I>>0.9)
for the input taken from the tail lobe, which somewhat degrades if using the
"measurements" from the central plasma sheet. The regression relationship
between the predicted and computed flux values is rather stable allowing one
to correct the absolute value of predicted magnetic flux.
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We conclude that this method is a perspective tool to monitor the tail
magnetic flux which is one of the main global magnetotail parameters. |
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| ISSN: | 0992-7689 1432-0576 |