# Presentation: 204532

## Space Weather Aspects of the STEREO Mission

**Space Weather Aspects of the STEREO ****Mission**

**D.A. Biesecker****1**** and D.F. Webb****2**
**1****NOAA Space Environment Center; ****2****ISR/Boston College**

**Introduction**

**The STEREO Space Weather Group consists of scientists associated with the STEREO teams interested in space weather aspects of the mission. We operate a public web site at ****http://wwwsolar.nrl.navy.mil/STEREO/swx/swindex.html,**** where anyone from the scientific community can follow efforts to prepare computer programs, modeling efforts and research studies in preparation to use the STEREO observations as tools for Space Weather. Our activities are coordinated with the STEREO PI Teams and the STEREO Science Center (SSC) at GSFC.  **_***The list of tools and projects below shows the kind of ideas being pursued. We invite scientists from outside the STEREO teams to join in our efforts.***_** Our group interacts closely with the SECCHI 3D Reconstruction and Visualization Team; some of the 3D tools listed here overlap with science tools being developed by the 3D R&V team: http://wwwsolar.nrl.navy.mil/STEREO/3drv/scisoft/pasadena_replies.pdf.**
**The STEREO Beacon is the main STEREO effort focused on Space Weather; its main purpose is to provide low resolution, low cadence, near–real–time imaging and in–situ data to NOAA's Space Environment Center (SEC) for forecasting.  **_***The Beacon and its contents are described to the right side of the poster.***_**  In addition to the real–time Beacon data, the full science data stream will be downloaded to the SSC each day. These data will also be important for space weather, both for predicting and in improving our understanding of CME’s and related phenomena.**
**NOAA/SEC is always looking for products which will improve space weather forecasts.  STEREO is a mission which has obvious forecasting benefits, but is by no means the only mission.  Researchers who have developed tools or methods to improve these products are encouraged to contact NOAA/SEC.**  _***The forecast products which are most needed are shown in the top middle panel.***_

**The Beacon and Data Flow**
**	****633 bps – real–time continuous broadcast (no record capabilities)**
**The Beacon Data**
**IMPACT – numbers in parentheses denote # energy bands**
**MAG *****(Magnetometer)***
***	******B***** vectors at 3 samples/minute**
**     ****STE *****(Suprathermal Electron Telescope – e***** 2–20 keV*****)***
***	******e *****flux in 2 look directions, 8 energies, 16 samples/minute**
**     ****SWEA *****(Solar Wind Electron Analyzer***** – *****e***** eV–several keV*****)***
**	*****e *****density, bulk velocity, temperature at 13 samples/minute**
**	****pitch angle distributions at 2 energies, 24 samples/minute**
**     ****SEPT *****(Solar Electron Proton Telescope***** – *****e *****20–400keV; *****p***** 20–7000keV*****)***
**	*****e*****(2) and *****p*****(2) flux in 4 look directions (and summed); 1 minute avg.**
**     ****LET *****(Low Energy Telescope *****– *****p *****& He 1.5–13 MeV/nuc.; heavy ions 2–30 MeV/nuc.*****)***
**	*****p(1)***** flux in 2 look directions (and summed); 1 minute avg.**
**	****He(2) flux in 2 look directions; 1 minute avg.**
**	****He(1), ****3****He(2), CNO(3), Fe(4)  fluxes; summed over all look angles; 1 minute avg.**
**     ****HET *****(High Energy Telescope***** – *****e *****<5 MeV; *****p *****& He <100MeV/nuc.*****)***
**	*****e*****(1)*****, p*****(3)*****, *****He(3), CNO(2), Fe(1) fluxes; 1 minute avg.**
**     ****SIT *****(Suprathermal Ion Telescope***** – 30 keV/nuc. – 2 MeV/nuc.*****)***
**	****He(4), CNO(4), Fe(4) fluxes; 1 minute avg.**
**PLASTIC**
**	****1 minute resolution**
**	****	****Solar Wind H density, bulk H velocity**
**	****	****Solar Wind H+ temperature and heat flux tensors**
**	****	****Solar Wind He++ peak distribution, position, deflection step, energy step**
**	****5 minute resolution**
**	****	****Selected Solar Wind charge states**
**	****	****Suprathermal rates**
**S/WAVES**
**	****1 minute averages; 8 channels/octave from 16 kHz to 16 MHz**
**SECCHI**
**	****7 256x256 pixel images (w/lossy compression) per hour, including:**
**	****	****4 COR2 images**
**	****	****1 HI1/HI2 alternating**
**	****	****+ 4 byte sum of EUVI total intensity; CME detection flag**

**Real-time Beacon**

- Figure courtesy of W. Thompson

**Title****	****	****	****	****	****Leaders/Institutions****	****	****Brief Description**
_**GENERAL SCIENCE TOOL**_
**LOS Tool for SECCHI****	****	****P. Liewer, J. Hall, J. Lorre****	****Create synthetic white light images from 3D density data cube. Use with simple CME models.**
**White Light Images****	****	****JPL, NRL**
_**AUTOMATED DETECTION and IDENTIFICATION**_
**Computer Aided CME****	****	****E. Robbrecht, D. Berghmans,****	****Near-realtime tool for detecting CMEs in SECCHI images. Outputs: QL CME catalog w/measures of**
**Tracking (CACTus)****	****	****G. Lawrence, R. van der Linden time, width, speed; NRT CME warnings. Successfully tested on SOHO LASCO CMEs.****	****	****	****	****	****	****	****	****Royal Observatory Belgium****	****Test version available at http://sidc.oma.be/cactus.**
**Computer Aided EUVI****	****	****O. Podladchikova, D. Bergh-****	****NRT tool for detecting EUV waves & dimming regions.  To be tested on SOHO EIT images.**
**Wave & Dimming Detection****	****mans, A. Zhukov   ROB**
**Velocity Map Construction****	****J. Hochedez, S. Gissot****	****	****Program to analyze velocity flows on SECCHI images; detect CME onsets & EUV waves; NRT warnings**
**	****	****	****	****	****ROB****	****	****	****	****	****of fast CMEs; reconstruct 3D velocity maps of CMEs from 2D maps from each STEREO.**
**Automatic Solar Feature****	****	****D. Rust, P. Bernasconi, ****	****	****Tool for detecting and characterizing solar filaments and sigmoids Recognition & Classification in solar    ****	****	****	****	****	****B. LaBonte, JHU/APL****	****	****images. Goal is to meas. magnetic helicity parameters & forecast eruptions using filaments & sigmoids.**
_**3-D IMAGING TOOLS**_
**Tie Point Tool****	****	****	****E. DeJong, P. Liewer, J. Hall,****	****Manually create tiepoints between features in SECCHI image pair & solve for 3D location in**
**	****	****	****	****	****J. Lorre   JPL****	****	****	****heliographic coordinates.**
**Geometric Localization****	****	****V. Pizzo, D. Biesecker****	****	****Tool utilizing a series of LOSs from two views to define the location, shape, size and velocity**
**Of STEREO CMEs****	****	****	**** NOAA****	****	****	****	****of a CME.  To  be automated & used to decide whether and when a CME will impact Earth.**
**3D Structure of CMEs****	****	****V. Bothmer, H. Cremades,****	****Program to compare analysis of SECCHI images on the internal magnetic field configuration & near**
**	****	****	****	****D. Tripathi****	****MPI, Ger.****	****	****Sun evolution of CMEs with models based on SOHO observations.   Forecast flux rope structure; 3D****	****	****	****	****	****	****	****	****	****	****visualization of CMEs. **
_**HELIOSPHERIC STUDIES**_
**SECCHI HI Beacon ****	****	****R. Harrison, C. Davis****	****	****For space weather purposes the prime HI data product is the images sent in the beacon mode****	****	****	****	****	****	****	****RAL, MSSL****	****	****	****	****The HIs will observe CMEs along the Sun-Earth line from Cor2 to beyond Earth.**
**Structural Context****	****of****	****	****D. Webb, B. Jackson****	****	****Assuming an extended SMEI mission, use analyses of SMEI images, including 3D reconst.**
**Heliosphere Using****	****	****	****BC/AFRL, UCSD****	****	****	****mapping, to provide structural context of the heliosphere for STEREO HI observations.**
**SMEI Data****	****	****	****	****	****	****	****	****	****Also provide complementary observations of transient disturbances, especially CMEs.**
**Identifying & Tracking****	****	****R. Harrison, C. Davis****	****	****Produce simulations to show that model CMEs can be identified & tracked with the HIs.  Test**
**CMEs with the Helio-****	****	****RAL, MSSL****	****	****	****	****wavelet & other techniques for extracting CME signatures.  Use triangulation to measure**
**spheric Imagers****	****	****	****	****	****	****	****	****speed & direction of CMEs & forecast their Earth arrival. **
**Interplanetary Acceleration ****	****M. Owens****	****BU****	****	****	****Construct acceleration profiles of fast ICMEs over a large heliocentric range using multi-**
**of ICMEs****	****	****	****	****	****	****	****	****	****point HI observations of the leading edges to understand the forces acting on ejecta in ****	****	****	****	****	****	****	****	****	****	****	****	****	****interplanetary space, & improve predictions of arrival times of ICMEs at Earth.**
**Relationship between CMEs****	****S. Matthews,  MSSL****	****	****Assess the potential geoeffectiveness of CMEs based their association with magnetic clouds.**
**and Magnetic Clouds****	****	****	****	****	****	****	****What particular characteristics lead to production of a magnetic cloud?  Combine SECCHI ****	****	****	****	****	****	****	****	****	****	****	****	****images with in-situ measurements from both STEREOs & ACE.**
**Comparison of WSA****	****	****N. Arge, J. Luhmann, ****	****	****The Wang-Sheeley-Arge and ENLIL 3D MHD solar wind models will be integrated to provide**
**Model Predictions with****	****	****D. Biesecker AFRL/UCB/****	****	****routine predictions of vector s.w. velocity, polarity, IMF, s.w. density & temp. anywhere in**
**STEREO in-situ Data****	****	****NOAA ****	****	****	****	****heliosphere. Place model into in-situ STEREO displays (see next).**
_**DATA BROWERS and VIEWERS**_
**Solar Weather Browser****	****	****B. Nicula, D. Berghmans, R.****	****User-friendly browser tool for finding & displaying solar data & (SWB) context information.****	****	****	****	****	****	****	****van der Linden   ROB****	****	****Uses fast internet access & caching. Test version available at http://sidc.oma.be/SWB/.**
**STEREO Key Parameters****	****	****C. Russell & IMPACT, PLASTIC****	****An easily browsable Merged Key Parameter data display including the in-situ & SWAVES**
**	****	****	****	****& SWAVES teams   UCLA****	****radio data from STEREO.**
**Carrington Rotation In-situ****	****J. Luhmann, P. Schroeder****	****Browser for identifying in-situ events & their solar sources at CR-time scales.  Includes near-**
**Browser****	****	****	****	****UCB****	****	****	****	****	****Earth (ACE) data sets for third point views, & image movies from SECCHI & near-Earth (SOHO) ****	****	****	****	****	****	****	****	****	****	****	****s/c. See: http://sprg.ssl.berkeley.edu/impact/data_browser/index.html.**
**JAVA-3D Synoptic ****	****	****J. Luhmann, P. Schroeder****	****JAVA-3D applet for viewing 3D Sun & solar wind sources based on synoptic solar**
**Information Viewer****	****	****	****UCB****	****	****	****	****	****maps & potential field models of the coronal magnetic field.**

**Tools and Projects Being Developed for**
**STEREO Space Weather Purposes**

**NOAA/SEC’s BIG LIST**

- NOAA Space Environment Center forecasting needs.