Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
AN EVALUATION OF MAGNETOSPHERIC B-FIELD MODELS BASED ON IMP-HEOS AND ISEE DATASETS. / TSYGANENKO, NA; PEREDO, M; STERN, DP; MALKOV, MV.
SOLAR-TERRESTRIAL ENERGY PROGRAM. ed. / DN Baker; VO Papitashvili; MJ Teague. Pergamon Press, 1994. p. 275-278 (COSPAR COLLOQUIA SERIES; Vol. 5).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
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TY - GEN
T1 - AN EVALUATION OF MAGNETOSPHERIC B-FIELD MODELS BASED ON IMP-HEOS AND ISEE DATASETS
AU - TSYGANENKO, NA
AU - PEREDO, M
AU - STERN, DP
AU - MALKOV, MV
PY - 1994
Y1 - 1994
N2 - A new dataset comprising of more than 30,000 average magnetic field vectors measured by the ISEE spacecraft during 1977-1981 was used to generate magnetospheric magnetic field modeis similar to earlier ones based on IMP and HEOS data. First, a set of models was generated for the same Kp index intervals as those used in T87 and T89. A comparison between old and new models and their Kp-dependences showed them to be consistent, in spite of different time spans and spatial coverages of the datasets. Special attention was paid to the predicted Bz distribution in the near tail plasma sheet, of crucial importance for mapping the nightside poar ionosphere to the equatorial magnetosphere. Whilemodels based on IMP-HEOS data generally agree well with those based on ISEE, the latter show a significantly larger Bz in the neutral sheet, in agreement wth recent analyses of ISEE data. Because simultaneous solar wind data are available for most of the ISEE data, we were able to create models for different ranges of the solai wind ram pressure Pdyn and IMF Bz. It was found in line with the results of Sibeck et al. that the average model magnetopause shrinks and expands self-similarly as Pdyn increases and decreases. However, we failed to find the strong IMF-related contol of the magnetopause shape reported by Sibeck et al.
AB - A new dataset comprising of more than 30,000 average magnetic field vectors measured by the ISEE spacecraft during 1977-1981 was used to generate magnetospheric magnetic field modeis similar to earlier ones based on IMP and HEOS data. First, a set of models was generated for the same Kp index intervals as those used in T87 and T89. A comparison between old and new models and their Kp-dependences showed them to be consistent, in spite of different time spans and spatial coverages of the datasets. Special attention was paid to the predicted Bz distribution in the near tail plasma sheet, of crucial importance for mapping the nightside poar ionosphere to the equatorial magnetosphere. Whilemodels based on IMP-HEOS data generally agree well with those based on ISEE, the latter show a significantly larger Bz in the neutral sheet, in agreement wth recent analyses of ISEE data. Because simultaneous solar wind data are available for most of the ISEE data, we were able to create models for different ranges of the solai wind ram pressure Pdyn and IMF Bz. It was found in line with the results of Sibeck et al. that the average model magnetopause shrinks and expands self-similarly as Pdyn increases and decreases. However, we failed to find the strong IMF-related contol of the magnetopause shape reported by Sibeck et al.
KW - magnetosphere
KW - modeling
KW - spacecraft data
M3 - Conference contribution
SN - 0-08-042131-8
T3 - COSPAR COLLOQUIA SERIES
SP - 275
EP - 278
BT - SOLAR-TERRESTRIAL ENERGY PROGRAM
A2 - Baker, DN
A2 - Papitashvili, VO
A2 - Teague, MJ
PB - Pergamon Press
T2 - 1992 STEP Symposium/5th COSPAR Colloquium
Y2 - 24 August 1992 through 28 August 1992
ER -
ID: 28014676