Information about Trace

Trace may refer to:

Mathematics:

• Trace (linear algebra) of a square matrix or a linear transformation
• Trace class, a certain set of operators in a Hilbert space
• Trace operator, a restriction-to-boundary operator in a Sobolev space
• Field trace in field theory
• Traces, the equivalence classes of strings of a trace monoid, studied in trace theories of concurrent computation.

Language

• Trace (semiology), the history carried by a sign
• Trace (linguistics), a syntactic placeholder resulting from a transformation
• Trace, in deconstruction, is that which is not signified by a sign

Computing & electronics

• In computer science, a trace is a record of the steps a program has executed (such as a stack trace)
• Signal trace, a printed or etched wire on a printed circuit board
• Traces, the equivalence classes of strings of a trace monoid, studied in trace theories of concurrent computation.
• Trace, a fictional character in the game Metroid Prime Hunters

Physical sciences

• Trace radioisotope, an element that is found in small quantities because it undergoes radioactive decay
• Trace evidence, material found at a crime scene
• In geochemistry, a trace element is one which composes less than 0.1% of a sample
• TRACE (Transition Region and Coronal Explorer), a NASA satellite

Other

• Trace, a 1995 album by alt-country band Son Volt
• Tracing (law), to assert a proprietary remedy against a third party asset
• Trace (tack), one of two or more straps, ropes, or chains by which a vehicle is drawn by a harnessed draught animal
• TrAce Online Writing Centre, a community for writers working online
• Trace (novel), a 2004 novel by Patricia Cornwell
• Portgas D. Ace, also known as Trace, a fictional character in the manga One Piece
• Trace (artist), a UK Drum and Bass artist
• Trace (magazine), British hip-hop magazine

See also

• DTrace
• tracing

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TRACE
Illustration of TRACE Artist's Illustration of TRACE in orbit
General information
Organization:	NASA
Launched:	2 April, 1998
Telescope style:	Cassegrain reflector
Wavelength:	white light (1700 Å–10000 Å), UV (~1216 Å, 1550 Å, ~1600 Å, ~1700 Å), EUV (171 Å, 195 Å, 284 Å)
Diameter:	30 cm
Focal length:	8.66 m
Website:	[1]

TRACE, or the 'Transition Region and Coronal Explorer' is a NASA space telescope designed to investigate the connections between fine-scale magnetic fields and the associated plasma structures on the Sun by providing high resolution images and observation of the solar photosphere and transition region to the corona. A main focus of the TRACE instrument is the fine structure of coronal loops low in the solar atmosphere.



The satellite was built by NASA's Goddard Space Flight Center. Its telecope was constructed by a consortium lead by Lockheed Martin's Advanced Technology Center. TRACE was launched in April 1998 on a Pegasus rocket, has a 30 cm aperture and 1024 x 1024 CCD detector giving an 8.5 arc minute field of view. The telescope is designed to take correlated images in a range of wavelengths from visible light, through the Lyman alpha line to far ultraviolet. The different wavelength passbands correspond to plasma emission temperatures from 4,000 to 4,000,000 K.



TRACE is a SMEX or Small Explorer mission.

External links

• Official TRACE website
• Images taken by TRACE
• Transition Region and Coronal Explorer Mission Profile by NASA's Solar System Exploration

•  • [ e] Sun Spacecraft Missions
Orbiters	Pioneer 6, 7, 8 and 9 • Helios probes • Ulysses probe • Solar and Heliospheric Observatory (SOHO) • Reuven Ramaty High Energy Solar Spectroscopic Imager • Hinode • STEREO • TRACE • ACE
Sample return	Genesis
Future:	Solar Dynamics Observatory • Solar Orbiter • Solar Sentinels
Cancelled:	Pioneer H
(Bold: Active missions)