Simultaneous observations of solar wind plasma entry from FAST and POLAR

W. K. Peterson; Y. K. Tung; C. W. Carlson; J. H. Clemmons; H. L. Collin; R. E. Ergun; S. A. Fuselier; C. A. Kletzing; D. M. Klumpar; O. W. Lennartsson; R. P. Lepping; N. C. Maynard; J. P. McFadden; T. G. Onsager; W. J. Peria; C. T. Russell; E. G. Shelley; L. Tang; J. Wygant

doi:10.1029/98GL00668

Simultaneous observations of solar wind plasma entry from FAST and POLAR

W. K. Peterson, Y. K. Tung, C. W. Carlson, J. H. Clemmons, H. L. Collin, R. E. Ergun, S. A. Fuselier, C. A. Kletzing, D. M. Klumpar, O. W. Lennartsson, R. P. Lepping, N. C. Maynard, J. P. McFadden, T. G. Onsager, W. J. Peria, C. T. Russell, E. G. Shelley, L. Tang, J. Wygant

Physics and Astronomy (Twin Cities)

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Abstract

On November 15, 1996, NASA FAST and POLAR satellites obtained data in the cusp/cleft region for extended intervals. POLAR sampled a narrow range of local times. FAST observed cusp/cleft plasma for more than 5 hours in local time. At 07:51 UT the satellites were in near magnetic conjunction, and the interplanetary magnetic field was steady for an extended interval before this time. We confirm prior observations that show solar wind plasma often enters the magnetosphere over extended regions of local time. For the one hour interval of steady solar wind conditions when POLAR encountered cusp/cleft plasma, irregularly spaced ion injections interspersed with intervals of nearly constant cusp/cleft ion fluxes were observed. The data are consistent with temporal variations in the reconnection rate. At the time of the near conjugate observations the data suggest that solar wind plasma entered the magnetosphere over an extended region of the magnetopause, i.e. not in small discontinuous patches.

Original language	English (US)
Pages (from-to)	2081-2084
Number of pages	4
Journal	Geophysical Research Letters
Volume	25
Issue number	12
DOIs	https://doi.org/10.1029/98GL00668
State	Published - Jun 15 1998

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Peterson, W. K., Tung, Y. K., Carlson, C. W., Clemmons, J. H., Collin, H. L., Ergun, R. E., Fuselier, S. A., Kletzing, C. A., Klumpar, D. M., Lennartsson, O. W., Lepping, R. P., Maynard, N. C., McFadden, J. P., Onsager, T. G., Peria, W. J., Russell, C. T., Shelley, E. G., Tang, L., & Wygant, J. (1998). Simultaneous observations of solar wind plasma entry from FAST and POLAR. Geophysical Research Letters, 25(12), 2081-2084. https://doi.org/10.1029/98GL00668

Peterson, WK, Tung, YK, Carlson, CW, Clemmons, JH, Collin, HL, Ergun, RE, Fuselier, SA, Kletzing, CA, Klumpar, DM, Lennartsson, OW, Lepping, RP, Maynard, NC, McFadden, JP, Onsager, TG, Peria, WJ, Russell, CT, Shelley, EG, Tang, L & Wygant, J 1998, 'Simultaneous observations of solar wind plasma entry from FAST and POLAR', Geophysical Research Letters, vol. 25, no. 12, pp. 2081-2084. https://doi.org/10.1029/98GL00668

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abstract = "On November 15, 1996, NASA FAST and POLAR satellites obtained data in the cusp/cleft region for extended intervals. POLAR sampled a narrow range of local times. FAST observed cusp/cleft plasma for more than 5 hours in local time. At 07:51 UT the satellites were in near magnetic conjunction, and the interplanetary magnetic field was steady for an extended interval before this time. We confirm prior observations that show solar wind plasma often enters the magnetosphere over extended regions of local time. For the one hour interval of steady solar wind conditions when POLAR encountered cusp/cleft plasma, irregularly spaced ion injections interspersed with intervals of nearly constant cusp/cleft ion fluxes were observed. The data are consistent with temporal variations in the reconnection rate. At the time of the near conjugate observations the data suggest that solar wind plasma entered the magnetosphere over an extended region of the magnetopause, i.e. not in small discontinuous patches.",

author = "Peterson, {W. K.} and Tung, {Y. K.} and Carlson, {C. W.} and Clemmons, {J. H.} and Collin, {H. L.} and Ergun, {R. E.} and Fuselier, {S. A.} and Kletzing, {C. A.} and Klumpar, {D. M.} and Lennartsson, {O. W.} and Lepping, {R. P.} and Maynard, {N. C.} and McFadden, {J. P.} and Onsager, {T. G.} and Peria, {W. J.} and Russell, {C. T.} and Shelley, {E. G.} and L. Tang and J. Wygant",

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AU - Peterson, W. K.

AU - Tung, Y. K.

AU - Carlson, C. W.

AU - Clemmons, J. H.

AU - Collin, H. L.

AU - Ergun, R. E.

AU - Fuselier, S. A.

AU - Kletzing, C. A.

AU - Klumpar, D. M.

AU - Lennartsson, O. W.

AU - Lepping, R. P.

AU - Maynard, N. C.

AU - McFadden, J. P.

AU - Onsager, T. G.

AU - Peria, W. J.

AU - Russell, C. T.

AU - Shelley, E. G.

AU - Tang, L.

AU - Wygant, J.

PY - 1998/6/15

Y1 - 1998/6/15

N2 - On November 15, 1996, NASA FAST and POLAR satellites obtained data in the cusp/cleft region for extended intervals. POLAR sampled a narrow range of local times. FAST observed cusp/cleft plasma for more than 5 hours in local time. At 07:51 UT the satellites were in near magnetic conjunction, and the interplanetary magnetic field was steady for an extended interval before this time. We confirm prior observations that show solar wind plasma often enters the magnetosphere over extended regions of local time. For the one hour interval of steady solar wind conditions when POLAR encountered cusp/cleft plasma, irregularly spaced ion injections interspersed with intervals of nearly constant cusp/cleft ion fluxes were observed. The data are consistent with temporal variations in the reconnection rate. At the time of the near conjugate observations the data suggest that solar wind plasma entered the magnetosphere over an extended region of the magnetopause, i.e. not in small discontinuous patches.

AB - On November 15, 1996, NASA FAST and POLAR satellites obtained data in the cusp/cleft region for extended intervals. POLAR sampled a narrow range of local times. FAST observed cusp/cleft plasma for more than 5 hours in local time. At 07:51 UT the satellites were in near magnetic conjunction, and the interplanetary magnetic field was steady for an extended interval before this time. We confirm prior observations that show solar wind plasma often enters the magnetosphere over extended regions of local time. For the one hour interval of steady solar wind conditions when POLAR encountered cusp/cleft plasma, irregularly spaced ion injections interspersed with intervals of nearly constant cusp/cleft ion fluxes were observed. The data are consistent with temporal variations in the reconnection rate. At the time of the near conjugate observations the data suggest that solar wind plasma entered the magnetosphere over an extended region of the magnetopause, i.e. not in small discontinuous patches.

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Simultaneous observations of solar wind plasma entry from FAST and POLAR

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