S. Frey et.al., THEMIS Ground-Based Observatory Analysis 1 San Francisco, Fall AGU, December 16, 2004

Analysis

•Used predicted THEMIS spacecraft positions for conjunctions on March 5-6, 2007, during the first planned THEMIS tail

season•Pretended that observations were performed on March 4-5, 2001 when IMAGE-FUV observed 3 substorm onsets between 23:30 and 07:00 UT•Mapped THEMIS GSM-positions along magnetic field using the

Tsyganenko-2001 model with propagated ACE solar wind conditions for March 4-5, 2001 as input parameters

•Constructed auroral keograms in FUV data as would be collected by location-fixed GBO’s

•Constructed auroral keograms at the mapped footprints of THEMIS satellites as they would move over North America in time

S. Frey et.al., THEMIS Ground-Based Observatory Analysis 2 San Francisco, Fall AGU, December 16, 2004

Change of THEMIS Latitude Footprint with IMF Bz

S. Frey et.al., THEMIS Ground-Based Observatory Analysis 3 San Francisco, Fall AGU, December 16, 2004

Onset Locations,THEMIS Footprints, and GBO Keograms

FUV KEOGRAMKIANA195+/-5 deg. longitude

FUV KEOGRAMGILLAM260+/-5 deg. longitude

FUV KEOGRAMGOOSE BAY295+/- 5 deg. longitude

P1 footprints

P2 footprints

P3,4 footprints

P5 footprints

S. Frey et.al., THEMIS Ground-Based Observatory Analysis 4 San Francisco, Fall AGU, December 16, 2004

Auroral Brightness Traces at THEMIS Footprints

P1

P2

P3,4

P5

S. Frey et.al., THEMIS Ground-Based Observatory Analysis 5 San Francisco, Fall AGU, December 16, 2004

THEMIS P1 and P5 Keograms

Keograms through WIC images at instantaneous magnetic footprints of THEMIS outer most (P1, left) and inner most (P5, right) probes

FUV KEOGRAMP1 Footprint23:30 – 07:00 UT

FUV KEOGRAMP5 Footprint23:30 –07:00 UT

S. Frey et.al., THEMIS Ground-Based Observatory Analysis 6 San Francisco, Fall AGU, December 16, 2004

FUV Images

THE END

S. Frey et.al., THEMIS Ground-Based Observatory Analysis 7 San Francisco, Fall AGU, December 16, 2004

FUV Images

FUV images March 4-5, 2001 23:30 –05:36 (WIC)