Toward predicting the position of the magnetopause within geosynchronous orbit

Shue, J.‐H.; Song, P.; Russell, C. T.; Chao, J. K.; Yang, Ya Hui

doi:10.1029/1999ja900467

Cited by 41 publications

(61 citation statements)

References 22 publications

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“…Shue et al (1998); Kuznetsov and Suvorova (1998); or Kawano et al (1999). Moreover, according to Shue et al (1998Shue et al ( , 2000; Kuznetsov and Suvorova (1998), and Petrinec and Russell (1996), the models have almost the same performance during normal solar wind conditions.…”

Section: Discussionmentioning

confidence: 73%

The magnetopause shape and location: a comparison of the Interball and Geotail observations with models

et al. 2002

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Abstract.A number of magnetopause models have been developed in the course of last three decades. We have chosen seven of them and tested them using a fresh set of magnetopause crossings observed by Interball-1, Magion-4, and Geotail satellites. The crossings cover the magnetopause from the subsolar region up to near-Earth tail (X GSE ∼ −20 R E ) and all geomagnetic latitudes. Our study reveals that (1) the difference between investigated models is smaller than the error of prediction caused by the factors not included in models, (2) the dayside magnetopause is indented in the cusp region, (3) the deepness of the indentation can reach ∼ 4 R E , and (4) the dimensions of the indentation do not depend on the dipole tilt, whereas its location does.

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Section: Discussionmentioning

confidence: 73%

The magnetopause shape and location: a comparison of the Interball and Geotail observations with models

et al. 2002

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“…By using the empirical model of the magnetopause, the lower limit of the solar wind dynamic pressure during the GMC can be estimated. In this study, the magnetopause model developed by Shue et al (1998Shue et al ( , 2000 was used for our estimation. The equations in their model are r 0 ¼ 10:22 þ 1:29 tanh 0:184…”

Section: Methodsmentioning

confidence: 99%

Estimating the solar wind conditions during an extreme geomagnetic storm: a case study of the event that occurred on March 13–14, 1989

2015

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The solar wind conditions of an extreme geomagnetic storm were examined using magnetic field observations obtained from geosynchronous satellites and the disturbance storm-time (Dst) index. During geosynchronous magnetopause crossings (GMCs), magnetic field variations at the magnetosheath, which is the modulated interplanetary magnetic field (IMF), were observed by geosynchronous satellite. The dawn to dusk solar wind electric field (VB S ) was estimated from the Dst index by using an empirical formula for Dst prediction; these data were then used to estimate the IMF and solar wind speed. This method was applied in the analysis of an extreme geomagnetic storm event that occurred on March 13-14, 1989, for which no direct solar wind information was available. A long duration of the GMC was observed after the second storm sudden commencement (SSC) of this event. The solar flare possibly associated with the second SSC of this storm event was identified as the March 12 M7.3/2B flare. The IMF B z was estimated to be about −50 nT with a solar wind speed of about 960 km/s during the 5 h in which the main phase of the storm rapidly developed, assuming an Alfvén Mach number (M A ) during this period of more than 2.

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“…The effect of the IMF-B Z on the shape of the magnetopause at this local time and latitude of Cluster is not well known, since most data sets have used available data predominantly from low-latitude spacecraft. Studies of the shape and location of the magnetopause boundary, including the effect of IMF-B Z , have been reviewed by Fairfield (1995) and Shue et al (2000). Since we use the model boundary for guidance only, a detailed consideration of this effect is not critical to the discussion here.…”

Section: Overview and Datamentioning

confidence: 99%

Cluster observes the Earth’s magnetopause: coordinated four-point magnetic field measurements

Dunlop¹,

Balogh²,

Cargill³

et al. 2001

Ann. Geophys.

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Abstract. The four-spacecraft Cluster mission has provided high-time resolution measurements of the magnetic field from closely maintained separation distances (200-600 km). Four-point coverage of the Earth's magnetopause began on the 9 and 10 November 2000 when all spacecraft first exited the dusk-side magnetosphere at about 19:00 LT, providing extensive coverage of the near flank magnetosheath and magnetopause boundary layer on re-entry to the magnetosphere. The traversals on this occasion were caused by the arrival of an intense CME at the Earth, which produced a large compression of the magnetopause and high magnetic activity. The magnetopause traversals represent an unprecedented data set, allowing detailed analysis of the local magnetic structure (gradients) and dynamics of the magnetopause boundary. By performing minimum variance analysis (MVA) on the magnetic field data from all four spacecraft, we demonstrate that the magnetopause was planar on the scale of the spacecraft separation scales and that the transverse scale size of the magnetopause boundary layer was 1000-1100 km. We also show that the motion of the boundary (defined by the magnetic shear at the current layer), is changing over the sequence of spacecraft crossings so that acceleration of the magnetopause can be very high in this region of the magnetosphere. Indeed, the magnetopause speed reaches the order of 300 km/s in response to the arrival of the interplanetary shock. Using MVA coordinates, we have identified a number of magnetospheric and magnetosheath FTE signatures, which are sampled simultaneously by all spacecraft at different distances from and on either side of the magnetopause. The signatures show a variation of scale with distance from the boundary.

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Toward predicting the position of the magnetopause within geosynchronous orbit

Cited by 41 publications

References 22 publications

The magnetopause shape and location: a comparison of the Interball and Geotail observations with models

The magnetopause shape and location: a comparison of the Interball and Geotail observations with models

Estimating the solar wind conditions during an extreme geomagnetic storm: a case study of the event that occurred on March 13–14, 1989

Cluster observes the Earth’s magnetopause: coordinated four-point magnetic field measurements

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