On Monday, June 21, 2010, at 23:57 UT, the Transition Region and
Coronal Explorer (TRACE) took its last science exposure after over
twelve successful years on orbit. The image to the left shows
the TRACE 171A exposure embedded in a nearly cotemporal SDO
AIA 211/193/171 composite of the full Sun.
The TRACE Small Explorer was a remarkably successful mission, with
over 1000 scientific publications to date based directly or indirectly
on its millions of images of the hot outermost atmosphere of the Sun.
Designed for an 8-month prime mission, the instrument continued to
function without significant flaws up to its last image. But its
capabilities have been overtaken by the state-of-the art Atmospheric
Imaging Assembly on the Solar Dynamics Observatory in all but the
sharpness of its images. Hence, after a few months of joint observing
to enable cross-calibration that allows SDO's AIA to build on a full
solar cycle of coronal observations, it was time to part with TRACE.
We thank NASA and the community for their lasting support. It has
been a privilege to be associated with all of the scientists who
contributed to TRACE's success; hopefully, the legacy that it leaves
in the TRACE resident archive (accessible through trace.lmsal.com, as
always) will continue to be a valuable asset in years to come.
What TRACE observed: a visual target synopsis
Looking for observations of active-region disk crossings, filaments on the limb, quiet Sun, the north pole, or coronal holes with TRACE? We have multiple summaries of observations on line including a visual summary of the entire mission [until 2009/09/28 at present]. Click here 171Å) or here (white light).
Embedded within the image descriptions of the images are some links to short, and generally small, movies. To make it easier to find these, they are listed separately below. Clicking on ``description'' will show the page that contains the description, positioned approximately near the start of the corresponding description. Clicking on ``Movie #'' should launch a movie player; how and which one depends on the ``applications'' settings of your browser.