1. STEREO Planned Launch November, 2005. Stereo imaging of Sun; coronal mass ejections from birth to Earth impact. What determines geo-effectiveness of solar mass ejections? What is their role in generating solar energetic particles? Maps the corona and heliosphere in 3-D. Shows the shock fronts leading the ejections. Will show how shocks create hazardous energetic particles Research tool and prototype space weather & early warning system for solar energetic particles

2. STEREO MISSION FACTS Measurement Strategy Obtain images from two perspectives simultaneously Maintain a rapid camera cadence to capture fast events Track coronal mass ejections from the Sun to beyond Earth's orbit Trace shockwaves by radio emissions Sample bursts of energetic particles Sample the magnetic fields and solar plasmas at Earth's orbit Autonomous solar event recognition Mission Profile Solar imaging and space environment sampling by two identical spacecraft at gradually increasing angular separations from Earth STEREO #1 leads Earth by 15° after 2 years STEREO #2 lags Earth by 60° after 2 years Instruments On Board Each Spaceraft Chromosphere and inner corona imager Coronagraph Radio burst antenna Heliospheric cloud imager Solar wind plasma analyzer Magnetometer Energetic particle detector

3. Solar B Addresses fundamental physics: “How and Why the Sun Varies” Relevant to global climate change Application: Prediction of solar activity affecting human technology and space flight Major advance in capability (e.g. factor of 10 higher spatial resolution of solar magnetic fields) International Partnerships: Japan provides spacecraft & launch; Japan, U.S. and Great Britain provide scientific instrumentation. Planned launch September, 2006

5. SOLAR-B (see http://ilws.gsfc.nasa.gov/ilws_missions.htm) Agencies: ISAS (Japan), NASA (United States), PPARC (Great Britain) Websites: http://www.isas.ac.jp/e/enterp/missions/index.html http://stp.gsfc.nasa.gov/missions/solar-b/solar-b.htm Goal: Investigate: Creation and Destruction of the Sun's Magnetic Field Modulation of the Sun's Luminosity Generation of UV and X-ray Radiation Eruption and Expansion of the Sun's Atmosphere Measurements: Solar Optical Telescope with angular resolution 0.25" and wavelength range 480-650nm feeding a Magnetograph providing vector magnetic field and Doppler velocity measurements, photospheric intensities (field of view of 164x164 arcsec squared, temporal resolution of 5 min) and a spectrograph providing detailed Stokes line profiles of intensity and polarization. X-Ray Telescope with wavelength range of 2.0 to 60.0 Å, angular resolution of 1.0 to 2.5 arcsec, field of view giving full or partial disk, providing coronal images at different temperatures. EUV Imaging Spectrograph with pixel size of 1.5 arcsec x 0.002nm, field of view of 400 arcsec, wavelength range 25-29nm, and temperature range 1 x 10e5 - 2 x 10e7 K, providing Doppler line widths and shifts and monochromatic images. Orbit: Polar at 600 km, Sun synchronous, inclination 97.9 degrees. Status: In development, launch planned in September, 2006.

6. Solar-B Solar Magnetic Variability: Emerging magnetic field topology. reveals the workings of the solar. dynamo within Sun’s interior Solar-B will observe the emerging. magnetic field and, for the first. time, its twist, with high precision The processes by which solar. magnetism leaves the Sun to produce a solar cycle are unknown. Solar-B will directly show the magnetic flux removal process and its role in the cycle. Solar-B will provide the first accurate measurements of magnetic fields and electric. currents causing flares and coronal mass ejections that affect Earth Solar Brightness Changes: Extremely small scale features cause the solar cycle changes in the luminosity Solar-B will make the first observations with the spatial & temporal resolutions,. and wavelength coverage to determine the how these features produce long-term solar. luminosity changes

7. Red: Faster Rotation Blue: Slower Rotation Solar Dynamics Observatory - Next Generation SOHO Imaging Magnetic Structures (rapid time sequences -- “movies”) Imaging Solar Interior Link to solar cycle? Imaging Subsurface Structures Investigating solar dynamical processes and phenomena Observing development of magnetic and subsurface phenomena related to: -Flare &CME energy storage & triggering -The solar dynamo driving the solar cycle. High data rate from GEO orbit for studying dynamics (SOHO limited by low data rate from L1) Imaging CME’S Solar Dynamo?

8. Mission Description Close encounter with the Sun between 0.5 AU and 3 Rsun. First close flyby of a star. First view of Sun's polar regions. Technology Requirements Thermal shield and control at 4 Rsun. Integrated systems and instruments. New deep-space missions advanced technology. Solar Probe Science Objectives Understand the processes by which the corona is heated and the solar wind is accelerated. Determine the mechanisms for the different types of solar wind flow (fast, slow). Determine the relationship between the solar magnetic structure, surface features, and the solar wind near the Sun. Explore the dynamics of interior convection in the polar regions. Characterize the high-latitude magnetic field. Measurement Strategy In-situ diagnostic measurements of plasma, magnetic field, and high-energy particles. Magnetograph and Doppler imaging of the solar poles. Imaging of the corona in white light and EUV/X-rays.

9. 92 94 96 98 00 02 04 06 08 10 12 14 16 18Year Solar Heliospheric Magnetospheric ITM Complementary Operations may continue Funded to 2007 1 Solar Max Present Solar-Terrestrial Missions & “First Order” ILWS Missions ILWS SOHO 08 SDO TRACE 07 Solar-B ACRIMSAT/SORCE RHESSI 07 CoronasPhoton Picard STEREO L-5 Ulysses 08 WIND >07 ACE >07 Genesis Interhelioprobe Geostorm Geotail SAMPEX POLAR 05 FAST 06 IMAGE 07 CLUSTER TIMED 07 CNOFS DoubleStar GEC ITSP COSMIC AIM EPOP SWARM/ACE+ MMS RBSP RAVENS SWISE InterballPrognoz MagCon BepiColumbo AURA, GOES, GPS, NOAA-POES, DMSP, MetOp, NPOESS CORONAS-F SST Solar Orbiter Solar Sentinels August 14, 2003 version 07 SMEI THEMIS MESSENGER August 3, 2004 version