Session List

SUNDAY, 29 JUNE 1997

Special Session, TRACE: the Transition Region and Coronal Explorer

Sunday, 8:00-10:00pm, Rooms 275-276

The TRACE satellite is designed to obtain images of the solar transition region and corona with a spatial resolution of one arcsecond that can be taken only a few seconds apart. TRACE is currently scheduled for launch on December 15, 1997, only half a year away. TRACE will allow us to explore the fine structure and the dynamics of the magnetic field in the temperature range from 10,000 Kelvin up to several million Kelvin. The TRACE mission offers uninterrupted observing for months at a time. TRACE will be operated in conjuction with SOHO at Goddard Space Flight Center. The coordination of TRACE with SOHO and with other instruments, both in space and on the ground, provides a unique possibility to study the effects of the dynamic photospheric magnetic field on all temperature regimes of the outer atmosphere.

The session at the Solar Division Meeting in Bozeman is aimed at presenting the current status of the TRACE mission to the community, and at developing collaborations between investigator teams. We invite all our collegues to join us in this presentation and discussion session!

The TRACE telescope has an aperture of 30 cm, and will observe an 8.5 x 8.5 arcminute field of view with a resolution of one arcsecond. Coatings on four quadrants on the primary and secondary normal-incidence mirrors will allow observations in narrow spectral bands tuned to the Fe IX (171A), Fe XII (195A), and Fe XV (284A) lines in the EUV band, while filters allow observations in C IV, Ly alpha, and in the UV continuum using the UV mirror quadrant. The Sun-synchronous orbit allows long intervals of uninterrupted viewing. Observations at different wavelengths can be made seconds apart with a relative alignment of 0.1 arcsec.

The planned mission has only only eight months of observing. As much as possible of the important science must be done during that time. The short mission duration and the approaching launch date make it important to set up coordinated programs NOW!

The TRACE project has adopted a completely open data policy: the TRACE data will be available to everyone via the internet as soon as they are entered into the data base.

The session program includes an introduction of the mission and an outline of the science goals and observing strategies, followed by a general discussion:

8:00 General introduction A. Title

8:15 TRACE mission status J. Wolfson

8:30 TRACE science goals and plans K. Schrijver

8:50 Open discussion on A. Title observation modes and strategies, coordination with SOHO, YOHKOH, and ground-based observatories, and collaborations.

More information on TRACE can be found on the web at and at a special booth set up at the meeting.

For questions, comments, and suggestions send your email to