Front Page
 Scientific Ops
 Engineering
 Software
 Results
 Gallery
 Atlas
 Press
 Links
 Project
 Newsletter
 Copyright
 Quick Links
 Science Plan
 Requests
 User Guide
 Solar Weather
 Realtime
 Publications
 Archives
 SOHO
 Planning Notes
 STATUS
  SOHO
    Normal
  CDS
    Nominal

Welcome to the CDS website

Launched in 1995, the ESA/NASA Solar and Heliospheric Observatory (SOHO) is the world's largest solar physics space mission and it has revolutionised our understanding of the Sun. The Coronal Diagnostic Spectrometer (CDS) is a unique instrument, designed to detect solar extreme ultraviolet radiation which allows us to probe conditions in the solar corona. The spectra recorded by CDS provide information on temperature, density, elemental composition and flows of very hot plasma trapped in the Sun's magnetic field. The CDS operation is run from RAL, where the requests for observations from a user community of 15 UK institutes and over 60 world-wide groups are coordinated, planned and run.


Latest News: Sun|trek - an educational resource for schools

Sun|Trek image Sun|trek is an exciting new website for school students and teachers about the Sun and its effect on the Earth. Sun|trek has been motivated and inspired by the fantastic images and movies of the Sun taken from space (for example from the SOHO satellite). It is narrated by solar guides (young solar researchers), who not only share the excitement that they feel about working with these solar space projects, but also say a bit about themselves, how they became interested in astronomy and what their other interests are. They are 'role models' who could inspire the younger students.


Soho
The detection of magneto-acoustic waves propagating from the chromosphere to the corona using CDS. Left panel: a composite CDS and TRACE multi-wavelength image of an active region. The coincidence of the sunspot umbra, sunspot plume (turquoise), and emerging coronal loop system (blue) is apparent. These are locations where magnetic-acoustic waves have been detected, propagating from the chromosphere to the corona. Right panel: atmospheric structure above a sunspot with increasing temperature, obtained from CDS and other SOHO instruments. More details can be found in Marsh & Walsh (2006).

Selected results and movies from SOHO - courtesy of the SOHO and Instrument teams.

SOHO Spacecraft animation
QuickTime

Our mysterious Sun

QuickTime

The complex & violent solar atmosphere
QuickTime

The quiet and active Sun
QuickTime

Close up on convection cells
QuickTime

Peeling back the solar atmosphere
QuickTime

Temperature mapping the Sun
QuickTime

Solar Tornadoes.

The Vibrating Sun

QuickTime

Coronal Mass Ejection

QuickTime

Driving the Earths Aurora animation
QuickTime

The Comet Neat

QuickTime

Two out of a thousand Comets
QuickTime

The big one

QuickTime

Four Planets & the Plieades
QuickTime

Magnetic Field Structure animation
QuickTime

Surface Magnetic polarities
QuickTime

Problems viewing the movies:
Mozilla,Firefox & Windows Media Player should work fine together
IE & Windows Media Player may have issues:
Either click 'close' on the WMP 'download failed box' then click play on WMP
(Once cached locally the movie should play)
or right click on an image and select 'Save Target as' then save file to disc.
Play the saved file by double clicking on it.
or simply chose the QuickTime option

Some amazing facts about CDS
  • 10,000,000 exposures have been taken
  • 34,000 science studies have been run
  • 240,000 science fits files have been produced
  • 3,500 individual science plans have been made
  • 400,000 command blocks have been sent to CDS by the CDS ground system
  • 400GB of data sent back from CDS
  • 666 reviewed science papers published
    The mechanisms have performed:
  • 24,000,000 mirror steps
  • 7,000,000 slit steps
  • 24,000,000 instrument pointing movements
    and all with just one major service, and that was before launch

News:
A CDS Intrument status page is now online.
The CDS User Guide has been updated with latest GIS information.


FINAL FITS PRODUCTS
We still await the definative orbit information files. Processing of CDS final telemetry continues, though data sets are not being flagged as 'Final' until the orbit files becomes available. View the CD Processing page to see the current processing status


Missed our previous 'Front Pages'


From the CDS Operations Management Team in the Space Science & Technology Department at CCLRC Rutherford Appleton Laboratory
Site maintained by John Rainnie.
Site Statistics
Last revised on Thursday ( 9/Aug/2007) at 15:50.