Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
Do the observations confirm the high-speed flow braking model for substorms? / Yahnin, AG; Kornilov, IA; Kornilova, TA; Sergeev, VA; Lui, ATY; Liou, K; Meng, CI; Pajunpaa, A.
PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON SUBSTORMS. ed. / A Wilson. ESA Publication Division, 2000. p. 345-348 (ESA SPECIAL PUBLICATIONS; Vol. 443).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › Research › peer-review
}
TY - GEN
T1 - Do the observations confirm the high-speed flow braking model for substorms?
AU - Yahnin, AG
AU - Kornilov, IA
AU - Kornilova, TA
AU - Sergeev, VA
AU - Lui, ATY
AU - Liou, K
AU - Meng, CI
AU - Pajunpaa, A
PY - 2000
Y1 - 2000
N2 - We selected several cases when Geotal satellite situated in the mid-tail was in conjunction with ground-based all-sky TV cameras observing auroral breakups. Localisation of auroral events within the field of view of ground-based stations has been controlled by the Polar imager data. Some of the events exhibited the existence of high-speed (500-700 km/s) Earthward plasma flows within the plasma sheet before the breakups. To verify if the fast flow could be a cause of the breakups a detailed consideration and timing of the phenomena has been done. We concluded that in the considered cases there was no causal relationship between fast Earthward flows and breakups. In addition a search for auroral precursors, which could occur poleward of pre-breakup are just before breakup, has been performed. As such structures might be subvisual, some filtration methods were applied to the TV data. Our analysis did not show any auroral precursors. Thus, our observations failed to confirm the model of substorm, which connects the auroral onset with the braking of the high-speed Earthward plasma flow.
AB - We selected several cases when Geotal satellite situated in the mid-tail was in conjunction with ground-based all-sky TV cameras observing auroral breakups. Localisation of auroral events within the field of view of ground-based stations has been controlled by the Polar imager data. Some of the events exhibited the existence of high-speed (500-700 km/s) Earthward plasma flows within the plasma sheet before the breakups. To verify if the fast flow could be a cause of the breakups a detailed consideration and timing of the phenomena has been done. We concluded that in the considered cases there was no causal relationship between fast Earthward flows and breakups. In addition a search for auroral precursors, which could occur poleward of pre-breakup are just before breakup, has been performed. As such structures might be subvisual, some filtration methods were applied to the TV data. Our analysis did not show any auroral precursors. Thus, our observations failed to confirm the model of substorm, which connects the auroral onset with the braking of the high-speed Earthward plasma flow.
M3 - статья в сборнике материалов конференции
SN - 92-9092-772-0
T3 - ESA SPECIAL PUBLICATIONS
SP - 345
EP - 348
BT - PROCEEDINGS OF THE FIFTH INTERNATIONAL CONFERENCE ON SUBSTORMS
A2 - Wilson, A
PB - ESA Publication Division
Y2 - 16 May 2000 through 20 May 2000
ER -
ID: 36631685