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

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Presentation transcript:

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 KEOGRAM KIANA 195+/-5 deg. longitude FUV KEOGRAM GILLAM 260+/-5 deg. longitude FUV KEOGRAM GOOSE BAY 295+/- 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 KEOGRAM P1 Footprint 23:30 – 07:00 UT FUV KEOGRAM P5 Footprint 23:30 –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, :30 –05:36 (WIC)