image 25-May-2019 17:45:20

Cluster Observations Around Magnetic Null

Date: 15 September 2001
Satellite: Cluster
Copyright: ESA

This plot shows the high-resolution (0.04 seconds) magnetic field data of four Cluster spacecraft and the calculated Poincaré index during 05:03:30-05:03:50 UT on 15 September 2001.

(a-d):

  The z component of magnetic field data of C1-C4

(e):

  The Poincaré index is calculated from intercalibrated high resolution data

A magnetic null is characterised by a Poincaré index equal to 1, such as around 05:03:36 UT. Outside this time period, the Poincaré index is found to be less than 10-6.


Last Update: 18 July 2006

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