Spacecraft Data Analysis PassBands TRACE & MDI Summary

| Front End | Focal Plane | Photo |

Cut-Away View

The 30 cm aperture TRACE telescope uses four normal-incidence coatings for the EUV and UV on quadrants of the primary and secondary mirrors. The segmented coatings on solid mirrors form identically sized and perfectly coaligned images. Pointing is internally stabilized to 0.1 arc second against spacecraft jitter. A 1024 x 1024 CCD detector collects images over an 8.5 x 8.5 arc minute field-of-view (FOV). A powerful data handling computer enables very flexible use of the CCD array including adaptive target selection, data compression, and fast operation for a limited FOV.

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Front End

The four mirror quadrants are selected by the quadrant selector behind the instrument entrance window.

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Focal Plane


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Telescope Housing and Guide Telescope

Extensive heritage enables the TRACE team to create an instrument more capable than might be expected on a SMEX budget. The NIXT rocket payload has taken the highest resolution EUV coronal images ever, and the NIXT team will provide the mirrors for TRACE. The SXT instrument has produced more than two million soft X-ray images of breathtaking quality. To manage, process, and analyze the SXT data, we have produced a very complete set of well documented image cataloging, archiving, and analysis software which will be used for the TRACE investigation. The MDI program has produced a complete flight instrument for SoHO including a CCD camera, image stabilization system, control and data handling computers , software, and highly reliable mechanisms. Many of the MDI designs and some of the spare flight hardware will be used on TRACE. The personnel (scientific, engineering, and management) and facilities assembled for SXT and MDI are ready to begin. These factors permit us to build a sophisticated instrument within the cost and time constraints of the Small Explorer program. Our operational experience and software base developed from the La Palma SOUP observations and the SXT and MDI missions will enable us quickly and efficiently to generate scientifically important and visually exciting results.


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(Lockheed Martin Missile & Space)

(The Lockheed Martin
Solar and Astrophysics Labs)

  Dr. Neal Hurlburt