AIA DATA ANALYSIS OVERVIEW OF THE AIA INSTRUMENT

Transcription

1 AIA DATA ANALYSIS OVERVIEW OF THE AIA INSTRUMENT SDO SUMMER SCHOOL ~ August 2010 ~ Yunnan, China Marc DeRosa (LMSAL) ~ derosa@lmsal.com

2 WHAT IS SDO? The goal of Solar Dynamics Observatory (SDO) is to understand: how the Sun s magnetic field is generated and structured how this stored magnetic energy is converted and released into the heliosphere and geospace in the form of solar wind, energetic particles, and variations in the solar irradiance

3 WHAT IS SDO? SDO was launched aboard an Atlas V rocket on 11 Feb from Kennedy Space Center in Florida. It is located in a neargeosynchronous orbit about its dedicated ground stations in New Mexico. It has been operating exceptionally well since launch (no major problems).

4 SDO S INSTRUMENTS Atmospheric Imaging Assembly (AIA) An array of 10 telescopes that together provide full disk, 1 images of the corona in 10 UV and EUV wavelengths every 10 seconds, in order to study evolving coronal structures across a multitude of temperatures. Extreme ultraviolet Variability Experiment (EVE) Measures the EUV spectral irradiance, enabling studies of its variation over a range of time scales. Helioseismic and Magnetic Imager (HMI) Doppler, intensity and magnetic images of the solar photosphere, allowing studies of the sources and evolution of activity within the solar interior.

5 WHAT IS AIA?

6 WHAT IS AIA? 304Å (He II) UV 211Å (Fe XIV) 335Å (Fe XVI) 94Å (Fe XVIII) 171Å (Fe IX) 193Å (Fe XII) 131Å (Fe XX)

7 AIA WAVELENGTH BANDS Wavelength Primary Ion Region of Atmosphere log T visible continuum photosphere Å continuum photosphere Å He II chromosphere Å C IV transition region Å Fe IX quiet corona, AR loops Å Fe XII, XXIV corona, hot flare plasma 6.1, Å Fe XIV active region corona Å Fe XVI active region corona Å Fe XVIII flaring active regions Å Fe XX, XXIII flaring active regions 7.0, 7.2

8 AIA SCIENCE THEMES Energy input, storage, and release from three-dimensional, dynamic coronal structures Coronal heating and irradiance as well as thermal structure and emission profiles Transients as sources of radiation and energetic particles Connections to geospace: particle, radiation, and magnetic field output of the sun Coronal seismology: the study of the corona using the evolution, propagation, and decay of waves

9 AIA SCIENCE THEMES Energy input, storage, and release 3D configurations of the solar corona Mapping magnetic free energy Evolution of the corona towards unstable configurations The life cycle of atmospheric field Coronal heating and irradiance Contributions to solar (E)UV irradiance by types of features Physical properties of irradiance-modulating features Physical models of the irradiance-modulating features Physics-based predictive capability for spectral irradiance Transients Unstable field configurations and initiation of transients Evolution of transients Early evolution of CMEs Particle acceleration Connections to geospace Dynamic coupling of corona and heliosphere Solar wind energetics Propagation of CMEs and related phenomena Vector field and velocity Coronal seismology Transverse waves: excitation, propagation, and decay Longitudinal waves: excitation, propagation, and decay Probing coronal physics with waves The role of magnetic topology in wave phenomena feature recognition surface field dispersal field visualization force-free fields loop fitting movie browsing potential field models thermal analysis

10 AIA S DATA STREAM SDO produces a titanic amount of data (in the TB/day range). Its orbit permits (nearly) continuous contact with ground stations located in a single location (in New Mexico). Remote users will not be able to download very much SDO data: One full-disk AIA image at full resolution is about 12MB compressed. About 1 week of AIA data = entire TRACE archive! As a result, techniques that help users locate datasets of interest have been developed. In what follows, we will demonstrate many of these tools.

11 OVERVIEW OF HMI / AIA DATA continuum 1700Å 1600Å 304Å 171Å 193Å 211Å 335Å 94Å 133Å magnetogram dopplergram

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13 April 24, 2010 Blue 1 MK Green 1.6 MK Red 2. MK

14 April 24, 2010 Blue 1 MK Green 1.6 MK Red 2 MK

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17 AIA 171Å + HMI MAGNETOGRAM

18 1 AUG 2010 EVENT

19 1 AUG 2010 EVENT

20 1 AUG 2010 EVENT

21 BROWSING SDO DATA Data for browsing are available in many places, including: under Data TheSunNow provides recent browse data from AIA and HMI, a simple movie maker, and small soft x-ray images from EVE. provides a series of recent AIA images, and a portal into the Heliophysics Events Knowledgebase. & are also useful for browsing images on a particular day of interest.

22 GETTING HMI AND AIA DATA Joint Science Operations Center (JSOC) at Stanford archives all HMI and AIA data ( HEK get_aia_data tool will request cutouts lookdata tool: SolarSoft, VSO,...

23 THE END