1. June 6-13, 2009 Sunrise Balloon Flight Studying the Sun with Milli-arcsecond Pointing

2. Why study the sun? The Sun this weekend The Sun in 2001 Images courtesy SOHO (ESA & NASA) Sunspots increase solar irradiance to the earth. The Sun's magnetic field creates sunspots.

3. The sun’s magnetic field erupts Particles impact satellites: Communications, Military, ISS, GPS. Particles flow down earth’s field lines, disrupt power grids. Image courtesy SOHO (ESA & NASA)

4. 1m UV/VIS Telescope Filtergraph (SUFI)  Phase-Diversity Imager  5 wavelength band between 214 and 397 nm (width 1 nm) Magnetograph (IMAX)  Tunable Fabry-Perot Etalon (LiNb), used in double path  LCD-Modulators  Phase-Diversity channel Wavefront correction (CWS)  6-element Wave-front sensor, Tip-tilt-mirror  Closed-loop bandwidth (0dB) 90 Hz The instruments Slide courtesy W. Schmidt, KIS

5. Correlating Wavefront Sensor, CWS 0.002 arcsec RMS measurement accuracy 90 Hz bandwidth (0 dB) Slide courtesy W. Schmidt, KIS

6. Elevation control - straightforward Azimuth control – tricky, nothing external to push against HAO’s job: provide ‘crude’ 50 arcsec pointing Flywheel Coarse Az motor

7. Where is the sun? Corner cells Liss Az Liss El Pass Fred

8. Thank you EOL/RAF !

10. Pointing Statistics Thirty three hours of excellent pointing Slide courtesy W. Schmidt, KIS

11. Images and data will soon be published. Beautiful SUFI data Phase-diversity beam splitter for diffraction-limited resolution in the UV 5 Interference filter (1 nm) 214 nm Continuum 300 nm Continuum 313 nm OH 388 nm CN 396 nm Ca II Exposure times between 200 ms and 30 s (214 nm)

12. Snapshots and time lapse data. (30 minutes!) Beautiful IMAX data Images and data will soon be published. 525.06 nm Fe I line, Landé factor g=3 2, 5, 10, or 12 positions across line. Time to record one 5-pos IQUV set with S/N 1000: 30 s Full Stokes, or Stokes V modes available (minimum cadence 8 s) Phase-Diversity channel (2nd camera) allows for post-facto correction achieving (nearly) diffraction-limited spectropolarimetry.

13. Thank you!