First particle injection event observed by THEMIS in conjunction with other ground and space measurements – preliminary results
03/23/2007 11:28 Goes 11 1989-046 Geotail LANL-97A THEMIS POLAR Cluster
Solar wind data from Cluster Northward turning was seen by Cluster around 11:08 after ~1 hour southward IMF. Ion data are needed to confirm the dynamic pressure enhancement seen by ACE. Mag Field q angel
No clear dipolarization from probe C? Proton flux enhancement in high energy range (>100keV). X Y Z THEMIS-C 30 keV~ 134 keV 400 keV THEMIS-D Clear dipolarization with a propagation or expanding speed of 200~300 km/s along GSM y direction. Injection arrive 10s seconds earlier than dipolarization THEMIS-B THEMIS-A c THEMIS-E D B A GSM x-y E
LANL-LOE LANL-LOP Drift Westward Drift Eastward Duskside LANL-97A Midnight 1989-046 Dawnside LANL data show the signatures excepted from the injection model. first electron injection at 11:21:00 first ion injection at 11:19:50
Injections mainly in higher energy channels. (>100 keV) Injections in all energy channels (30~100s keV)
Weak electron enhancement in the first four electron energy channels. No clear injection in the first four electron energy channels.
These three satellite detected the signature of first injection in a good time sequence. Particles were injected between LANL-97A and 1989-046. No dipolarization was seen by THC. 11:18 THC SST ION ~1min LANL-97A Ion dipolarization-like fluctuation 1989-046 1989-046 Electron ~4min LANL-97A ? THEMIS-C THEMIS-D A B THD SST ION 2~3min THEMIS A,B and D seen the injections associated with clear dipolarization signature.
GOES-11 (LT=2) seen a magnetic field reconfiguration at 11:16?It might not be a dipolarization. Hp He Hn >2MeV electron GOES 11 B-GSM
Geotail Energetic Particles Observation Energetic ion flux enhancement is observed at 11:21~23 near the dayside magnetopause. Is it related to any of the injections? or Is it directly driven by solar wind?
11:16? 11:21 Electron Drift 11:19:50 Ion Drift 11:21~23 11:22 11:18 No dipolarization from THEMIS-C? 11:19:10-20 200~300 km/s