SOI-MDI Newsletter
SOI-MDI Newsletter
Continuing SpaceCraft integration activities at Matra Marconi France.October 9-12 SOI-MDI Team Meeting, Fallen Leaf Lake, CA.
November 14-16 Science Operations Simulation, GSFC
April 2-6 4th SOHO Workshop, Asilomar Conference Center, Pacific GroveJuly 27 SOHO launch
Travel to Fallen Leaf is best accomplished by flying to San Francisco and then to the South Lake Tahoe Airport. Alternatively, fly to Reno and take the airport bus to South Lake Tahoe, or rent a car. Cars are unnecessary during the meeting itself.
Attached to this newsletter (for those who have registered for the meeting) are maps, Sierra Camp rules and regulations, and a form to request airport transportation from South Lake Tahoe (airport or bus terminal) to the Camp. **IMPORTANT:** This form must be received by the Camp a week in advance (that means by October 1). A phone call to the camp at 916-541-1244 by October 1 is also acceptable.
Check-in and registration will take place on Sunday from 3-5 pm in the Main Lodge. Fees may be paid (by cash or check - no credit cards) at that time or in advance (an invoice is included in this mailing). Room assignments will be given at check-in. Each person (except married couples) will have a private bedroom, and will share a ``cabin'' with one or two other people. If there is someone you particularly wish (or do NOT wish) to share a cabin with, please state that preference now, and not at check-in. If you arrive early on Sunday, you will be able to store luggage in the Main Lodge until check-in. Check-out time is 10 am on Wednesday.
Special dietary requests must be transmitted to the Camp kitchen. Please contact Margie right away, if you have not already made your needs known.
For further information, please contact Margie Stehle, mstehle@solar.stanford.edu, 415-723-1505.
Sunday, 9 October 19943:00-5:30 pm Check-in and registration, Main Lobby
7:00 pm Dinner, Dining Room
8:30-10:00 pm Welcoming reception, Old Lodge
Monday, 10 October 1994 7:30-8:15 am Breakfast, Dining Room
8:30-10:00 am Plenary session, Angora A
10:00-10:30 am Coffee break, Deck
10:30 am - noon Plenary session, Angora A
Noon - 1:00 pm Lunch, Dining Room
2:30 - 4:00 pm Science Working Team meetings, various locations
4:00-4:30 pm Coffee break, Deck
4:30-6:00 pm Science Working Team meetings, various locations
7:00 pm Dinner, Dining Room
Tuesday, 11 October 7:30-8:15 am Breakfast, Dining Room
8:30-10:00 am Science Working Team meetings, various locations
10:00-10:30 am Coffee break, Deck
10:30 am - noon Science Working Team meetings, various locations
Noon - 1:00 pm Lunch, Dining Room
1:30 - 3:00 pm Science Working Team meetings, various locations
6:45 pm Social hour, Old Lodge
7:30 pm Banquet, Dining Room
Wednesday, 12 October 7:30-8:15 am Breakfast, Dining Room
Before 10:00 am Check out of Lodge rooms
9:00-10:30 am Plenary session, Angora A
10:30-10:45 am Coffee break, Deck
10:45 am - noon Plenary session, Angora A
Noon - 1:00 pm Lunch, Dining Room
1:00 pm Depart
The Camp staff suggest that you might want to bring an alarm clock, a flashlight, and a tennis racquet.
Physical Address: 130 Fallen Leaf Rd.,
Fallen Leaf, CA 96151Mailing Address: P.O. Box 10618,
South Lake Tahoe, CA 96158
Phone Number: (916) 541-1244
Fax Number: (916) 541-2212
Team Science Reports
Active Region Seismology Team
This team held a well-attended meeting at GONG 94, in which the observing programs created in February were described and more (and better) ideas were solicited from the group. One response containing three proposed campaigns has since been received. In February, two campaign observing sequences were specified, and Mike Levay and I have looked at the IP coding for them. The basic AR seismology program (documented by Ellen Zweibel) is clearly feasible, although it requires one new IP instruction (which is also needed for calibration programs). The more complex plage campaign (documented by Colin Rosenthal) is probably achievable, but some questions remain open until it is actually coded. Requirements for very high frequency observations, which conflict with the Structure Program, were included in the initial MDI mission timeline; probably even more observing time in this mode will be needed than is scheduled so far. Although the proposed team meeting in early August did not happen, a brief meeting in Boulder during the Estes Park SoHO workshop is planned. At Fallen Leaf Lake, we will meet to discuss the status of the existing observing programs, new ideas from the group, and software and processing requirements on the SSSC and Co-I's to analyze these datasets.- Ted Tarbell
Internal Rotation (2-D Inversions) Team
Radial Stratification Team
Asphericity Team
As I am sure you are all aware there have not been many formal activities in this group since the LA meeting. Several of us did meet in Boulder this summer and made some progress in the area of inversions, as described in a recent GONG newsletter. At Stanford some progress has been made towards having a running reduction pipeline, but we still have some work left.For the Fallen Leaf Lake meeting we plan to have a couple of sessions like we did for the LA meeting. The time and agenda for these sessions have not been decided yet, but I would imagine that we would discuss the priorities for further work and any ideas for alternate analysis paths which we should implement before launch. I will send some of you questions you might think about before the meeting and possibly email a more detailed agenda for the sessions to the whole team.
- Jesper Schou
Magnetic Field Science Team
The SOI Magnetic Field Team currently includes Tom Berger, Rick Bogart, Jack Harvey, Todd Hoeksema (Leader and Local Coordinator), Sasha Kosovichev, Valeri Kotov, Phil Scherrer, George Simon, Ted Tarbell, Alan Title, Roger Ulrich, and Igor Zayer.
We have developed the following list of tasks to complete and will provide a status report at the team meeting in Fallen Leaf Lake. The group will meet during one of the team science time slots. If you want to propose something for our agenda, please contact Todd Hoeksema.
Task List Outline for Magnetic Field Science Team
I Magnetograms A. Level 0: Define DPC & DSNames, and enter in Data Directory B. Construct Observing Sequences C. Level 1: Calibration 1. Specify Algorithm 2. Construct & Test Module II Level 2 Processing A. Heliocentric remap (solar disk maps) B. Heliographic remap (Carrington coord) C. Synoptic chart construction 1. Specify Algorithm 2. Build & Test Module III Construct Test Data IV Other Data ProductsA. Specify Products, e.g. B-proxy, Ground-based B B. Implement & Test Procedures for Each
- Todd Hoeksema
GOLF Intercomparison Team
Early this summer the team revised the specifications for the observables to be used as proxies for recalibration of the GOLF signal. It is now planned that there will be two combinations of the filtergram intensities reported in the structure program rather than one; one of these observables is believed to be primarily sensitive to the presence of spots, the other to faculae. The observations will be at a higher spatial resolution than originally planned, but at a somewhat lower temporal cadence. The observables, resolution, and cadence have been chosen so that they can also provide the data for the Flux Budget program, thereby optimizing the use of the Structure Program telemetry. The requirements are being incorporated in the coding of the onboard processing for the Structure Program. There will be a splinter meeting at the October Team Meeting to review implementation progress and recent progress in understanding the characteristics and implications of the proxies.
- Rick Bogart
Ring Diagram Analysis Team
Following Peter Milford's departure from the program, Rick Bogart stepped in as the Coordinator for this active and high-priority team. The program was discussed as part of a productive and inspirational summer workshop organized by Juri Toomre in Boulder and attended by many team members. At that workshop a strawman plan for pipeline analysis of Ring Diagrams was drawn up. Soon after the workshop Deborah Haber visited Stanford to assist in the design and development of the required pipeline modules. With the additional assistance of Frank Hill and test data from the High-L Helioseismometer, development of the pipeline has been proceeding apace. We have also entered into a collaborative agreement with the Taiwan Oscillations Network (TON), directed by Dean Chou, for Ring Diagram analysis of TON data. We have hopes that the analysis of this data set may provide a rigorous pre-launch test of the capacity and functioning of the pipeline.
- Rick Bogart
Coronal Magnetic Field Team
This team does not plan a meeting at Fallen Leaf Lake.
- Xuepu Zhao
SOI-MDI Team News
SOI on World Wide Web
We have begun to assemble a SOI Information Center (sic) to provide timely news, comprehensive information, and quick interaction with team members. This service joins the avalanche of activities based on the Hypertext Transfer Protocol known as the World Wide Web and usually accessed through one of the Mosaic interfaces provided by the National Center for Supercomputing Applications at the University of Illinois. The Universal Resource Locator (URL) of the SOI home page is "http://soi.stanford.edu". At the time of writing there are no external links pointing to this page (it is solely an onramp to the Web), but that will change almost immediately. Most of you are probably already experienced and skilled navigators of the Web, and we invite you to peruse the existing directory from time to time as it undergoes rapid development. Your comments and suggestions will be most welcome; they should be directed to Rick Bogart, who is supervising the effort. Particular credit goes to Ajay Kunnath and our new student assistant Karen Tian for bringing you this service.- Rick Bogart
Welcome, Sasha!
Alexander (Sasha) Kosovichev has been hired to fill one of the SOI team's Research Scientist positions at Stanford. Sasha has been at the Institute of Astronomy in Cambridge, England, for the past four years. At Stanford, he will be the local coordinator for the helioseismology part of the structure program and continue his work on inversions and solar structure.
Stanford Visitors
SOI team members visiting Stanford over the past few months have included:
Douglas Gough Cambridge Deborah Haber Boulder Vasili Haneychuk Crimea Valery Kotov Crimea
Hale Prize awarded to Douglas Gough
The Division of Solar Physics is proud to announce that, with the endorsement of the American Astronomical Society, the 1995 Hale Prize is to be awarded to Professor Douglas Gough of the University of Cambridge. Gough has contributed with distinction to many aspects of solar physics, astrophysics, and fluid dynamics, including nonlinear convection in stars, the coupling of turbulent convection to pulsations, and stellar structure.Gough's theoretical inquiry has often combined fluid theory and the detailed physics of stellar structure, as when he showed that the core of the Sun is unstable to gravity modes. This instability may lead to episodes of mixing, casting some doubt on standard quiescent models.
In recent years, Gough has devoted most of his attention to helioseismology, to which he has made many notable contributions. He has led the way in applying inversion techniques to infer the internal structure and the distribution of angular velocity in the interior, and was the first to use helioseismic data to determine the depth of the convection zone. He has also used helioseismic data to investigate solar opacities, the equation of state, the helium abundance, and the neutrino problem.
Gough has also played a significant role in the development of the GONG project, the helioseismological experiments on SOHO, and observational programs in asteroseismology.
Congratulations, Douglas!
Peter A. Sturrock
Chair, SPD Hale Prize Committee
SOHO Report - from ESA
Vicente Domingo & Luis Sanchez
(From the July 1994 issue of ESA Solar System News.)The SOHO flight model instruments have been integrated in the Payload Module of the spacecraft at MATRA-Marconi in Portsmouth. Most of the instruments are in their final form, with a few exceptions that will require exchange of parts of an instrument. Especially the SUMER and UVCS instruments will have to wait until late this year to integrate the detectors, cross delay line (XDL) channel plate systems. These are being developed at the University of California, Berkeley, in substitution of their originally planned MAMA detectors. The first integrated system functional test of the flight payload was recently successfully completed. Environmental testing will take place in Toulouse, close to the site of the prime contractor. The launch date is set for 27 July 1995.
The instrument teams are now actively working on the development of the software to plan and operate their instruments and to capture, process and analyse the data. The SOHO Science Working Team (SWT), the Science Planning Working Group (SPWG) and the Science Operations Working Group (SOWG) are increasing their activity and prepare the in-orbit operations sequences for the scientific instruments, taking into account that the aims of SOHO can only be achieved by coordinated operation of the instruments and consequent cooperative data analysis. This effort points not only to prepare a set of scientific campaigns, but also to develop several in-flight intercalibration procedures. The basic infrastructure of the Experiment Operations Facility (EOF), at Goddard Space Flight Center, is now completed and the instrument workstations that will command the payload are being integrated (acceptance tested) at the rate of about one per week. Current plans are to start with the functional tests of this facility next November, with a series of science operations simulations. The EOF will also serve as a data analysis facility, encouraging joint analysis of observations obtained with several instruments. To support this the SOHO Data Archive is being implemented. It will hold a `live' copy of the complete SOHO data set, only excluding the MDI helioseismology data.
To protect the European character of the mission, the SOHO SWT has repeatedly recommended having a SOHO archive in Europe too. ESA therefore is asking interested institutions to propose to become depository of the SOHO data in Europe, the main condition being that the SOHO SWT endorses the proposer's plan. ESA has asked candidate institutions to submit their plans by 15 September at the latest.
MORE Spell-Check Funnies
CoI coy, cooEOF oaf, off, elf, hoof, ufo, foe
NSO nose, nosh, ness, noes, noose
Asphericity supercity, sparsity, sporicide, superscout, slipperiest
Helio hello, hell, helix, helios, holey, halo, hill, hilly, holy
Astero- aster, astir, astern, austere, satire, stereo, oystery, astray, estuary, satyr, ashtray, story
Internet interment, internee, interned
SUMER summer, simmer, saner, smear, sinner, sunnier, sooner
UVCS evicts, havocs, facts, ficus, focus, vex, vats
Toulouse tollhouse, tousle
Tahoe Thane, Thai, towhee, toe, tea, tale, towel, Utah
GSFC gasify, itself, Joseph
plage plague, plug, place, plane, plate
Last Modified: August 07, 1995