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Use of the Frequency Agile Solar Radiotelescope for Space Weather

Use of the Frequency Agile Solar Radiotelescope for Space Weather. A New Solar-dedicated Radio Facility. Dale E. Gary, NJIT; Stephen M. White, U Maryland. Outline of Talk . What is FASR? Space Weather Radiophysics Timeline Conclusions. What is FASR?. Frequency-Agile Imaging Array

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Use of the Frequency Agile Solar Radiotelescope for Space Weather

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  1. Use of the Frequency Agile Solar Radiotelescope for Space Weather A New Solar-dedicated Radio Facility Dale E. Gary, NJIT; Stephen M. White, U Maryland

  2. Outline of Talk • What is FASR? • Space Weather Radiophysics • Timeline • Conclusions

  3. What is FASR? • Frequency-Agile Imaging Array • Of order 100 antennas (5000 baselines) • Better than 1” imaging at 1 s time resolution • Full frequency coverage 0.1-30 GHz • Designed Specifically for Solar Imaging • Full Sun (to at least 12 GHz) • Designed for solar spatial scales • Designed for solar brightness variability Isaac Gary

  4. FASR Flyover Movie Isaac Gary

  5. Outline of Talk • What is FASR? • Space Weather Radiophysics • Timeline • Conclusions

  6. 3D View of Solar Atmosphere Coronal Magnetic Fields Synoptic Data CMEs on the Disk Eruptive Prominences Particle Acceleration Space Weather Radiophysics

  7. 3D View of Solar Atmosphere S. White

  8. 3D View of Solar Atmosphere Coronal Magnetic Fields Synoptic Data CMEs on the Disk Eruptive Prominences Particle Acceleration Space Weather Radiophysics

  9. Coronal Magnetic Fields J. Lee

  10. Lee & White

  11. Coronal Magnetograms S. White

  12. 3D View of Solar Atmosphere Coronal Magnetic Fields Synoptic Data CMEs on the Disk Eruptive Prominences Particle Acceleration Space Weather Radiophysics

  13. Synoptic Data Nobeyama 17 GHz synoptic map From K Shibasaki 1998

  14. 3D View of Solar Atmosphere Coronal Magnetic Fields Synoptic Data CMEs on the Disk Eruptive Prominences Particle Acceleration Space Weather Radiophysics

  15. Coronal Mass Ejections from Bastian et al. 2002

  16. CME Visibility in Radio • Best frequency to see thermal emission should be around 1 GHz or less. • Need very good imaging to see relatively low contrast • Multi-frequency gives physical parameters. from Bastian & Gary 1997

  17. Observed CME Spectrum from Bastian et al. 2002

  18. 3D View of Solar Atmosphere Coronal Magnetic Fields Synoptic Data CMEs on the Disk Eruptive Prominences Particle Acceleration Space Weather Radiophysics

  19. Erupting Prominences Gopalswamy et al. 1998

  20. 3D View of Solar Atmosphere Coronal Magnetic Fields Synoptic Data CMEs on the Disk Eruptive Prominences Particle Acceleration Space Weather Radiophysics

  21. Particle Acceleration from Aschwanden et al. 1996

  22. Particle Trajectories Type U bursts observed by Phoenix/ETH and the VLA. from Aschwanden et al. 1992

  23. Outline of Talk • What is FASR? • Space Weather Radiophysics • Timeline • Conclusions

  24. Timeline For FASR • 2002-3: Design Study (NSF/ATI) • International Science Definition Workshop (May 23-25, 2002) • Configuration studies; Software architecture • Design options; Costing (Current estimate $30 M) • 2004-5: Design and Development • Prototype Major Elements • Prototype Array (< 10 elements) • Refine Hardware and Software Design • 2005-8: Construction

  25. Outline of Talk • What is FASR? • Space Weather Radiophysics • Timeline • Conclusions

  26. Conclusions FASR… • is a solar-dedicated radio array designed specifically for the Sun • will obtain high-resolution images at hundreds of frequencies, 0.1-30 GHz • will measure coronal magnetic fields and make coronal magnetograms • will image CMEs and provide physical parameters (T, B, ne)

  27. Conclusions FASR… • will image thermal and nonthermal emission simultaneously • will study particle acceleration • will open a new era of study of the Sun and make new discoveries we cannot predict

  28. FASR and Space Weather • Standard observing mode • Daily data products • Coronal magnetograms • Coronal temperature maps • CME movies (?) • Type II, Type III movies • Input from Space Weather Community • What data products are most useful • What operational modes are needed • What are we missing?

  29. Principal Institutions and People NJIT D. E. Gary, P. Goode, J. Lee NRAO T. S. Bastian, J. Webber UMd S. M. White, A. Harris Berkeley G. J. Hurford Lucent L. J. Lanzerotti NSO C. Keller

  30. Nonthermal CME Parameters from Bastian & Gary 1997

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