Variation of dependence of the cusp location at different altitude on the dipole tiltReport as inadecuate




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Chinese Science Bulletin

, Volume 58, Issue 28–29, pp 3541–3545

First Online: 06 May 2013Received: 19 December 2012Accepted: 25 February 2013DOI: 10.1007-s11434-013-5831-1

Cite this article as: Guo, J., Shi, J., Cheng, Z. et al. Chin. Sci. Bull. 2013 58: 3541. doi:10.1007-s11434-013-5831-1

Abstract

Using the Cluster cusp crossings data, dependence of the cusp location at the mid-altitude on the geomagnetic dipole tilt during northward IMF is studied. The results show that the cusp center moves 0.051° Invariant Latitude ILAT upon the increase of 1° in the dipole tilt angle at the average altitude of 5.8 RE Earth radius. According to the present results obtained at the altitude of the Cluster orbit and previous results obtained at other altitudes of other satellite orbits, it is found that the higher the altitude in the cusp region is, the bigger the dependence of cusp location on the dipole tilt angle will be. If the altitude increases by 1 RE in the cusp region, the dependence will increase by 0.012° ILAT upon the increase of 1° in the dipole tilt angle. Some possible physical mechanisms are discussed and it shows that the cusp location will be more sensitive to the solar wind dynamic pressure if the altitude is high.

Keywordscusp location dependence dipole tilt altitude variation different satellite This article is published with open access at Springerlink.com

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Author: JianGuang Guo - JianKui Shi - ZhengWei Cheng - ZiYing Zhang - Zheng Wang - TieLong Zhang - ZhenXing Liu - Malcolm Dunlop

Source: https://link.springer.com/







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