WSO Photograph The Wilcox Solar Observatory

sn=13740	 time=2018:05:23_02h:10m:02s   CT2204:272
	trouble=20000011 sky= 0 NOTE: 
	 1 not complete
	 4 time critical
	23 do not use for synoptic charts

WSO Data: Mean Field Magnetograms Synoptic Charts Coronal Model Tables Other

The Wilcox Solar Observatory (WSO) began daily observations of the Sun's global magnetic field in May 1975, with the goal of understanding changes in the Sun and how those changes affect the Earth; this is now called space weather. Since 1976 low-resolution maps are also made of the Sun's magnetic field each day, as are observations of solar surface motions. The observatory is located in the foothills just west of the Stanford University campus.

Current research topics include space weather, helioseismology, and the solar cycle; The staff are closely associated with the HMI project on SDO and its magnetic field observations, and previously with the Solar Oscillations Investigation that uses the Michelson Doppler Imager (MDI) instrument on the SOHO spacecraft to observe the inside of the Sun.

Information is available concerning Solar Observatories Group, Astronomy at Stanford, and our Stanford laboratories: HEPL and KIPAC.

Stanford University operates WSO with all funding currently provided by NASA. Traditionally WSO was supported by the ONR, NASA, and the NSF. The observatory is directed by Dr. J. Todd Hoeksema.

WSO Dedication Pictures of WSO, staff members and other local wildlife.

Solar Center Visit the SOLAR Center -- our award winning educational web site providing on-line activities to encourage and share the wonder of solar science exploration.

You can also learn about Space Science at Windows to the Universe or The Exploration of the Earth's Magnetosphere or about some topics in astronomy in general at From Stargazers to Starships.

When is Sunrise?

The Sky Above
Click for Stanford, California Forecast

** ** ** Announcements ** ** **

The WSO Internet Connection is a bit flakey (May 2018) so some data products may be delayed.

WSO Solar Magnetic Field Observations


Synoptic Charts of the Photospheric Magnetic Field

Computed Coronal Field Maps

Numerical Data Tables

Data request forms for Computed Coronal Magnetic Field Tables

The Mean Magnetic Field of the Sun

Warning: WSO Polarization Sensitivity was reduced from 16 December 2016 to 18 May 2017.
Values of the mean field have NOT YET been recalibrated and are a factor of about 1.65 too small during that interval.

Other Quantities

Calibration Alert: WSO Polarization Sensitivity was reduced from 16 December 2016 to 18 May 2017.
Calibration has been completed and values based on magnetogram measurements have been increased by a factor of 1.55. This includes the polar field values.

  • The computed tilt angle [Table] [.gif] [.ps] of the Heliospheric Current Sheet is related to the measured
  • Solar Polar Field Strength: table | [.gif] | [.ps] ||| North [.gif] | South [.gif] [ : References : ]
  • Zonal magnetic flux transport over nearly 4 solar cycles: [ .gif] [ [.ps] ]
  • Solar Dipole and Multipole Components
  • Sector Boundary Lists

    Calibration NOTES:

  • Related Items of Interest.
  • WTRs - WSO Task Reports
  • WTRs - WSO Technical Info
    The WSO Web Page Format and data analysis processing were updated in late 2006.
    Please send comments to Todd Hoeksema