Magnetogram Chromosphere Observed from Wilcox Observatory
A solar magnetogram is a pictorial representation of the spatial variations in strength of the solar magnetic field. Magnetograms are often produced by exploiting the Zeeman effect (or, in some cases, the Hanle effect), which George Ellery Hale employed in the first demonstration that sunspots were magnetic in origin, in 1908. Solar magnetograms are produced by suitably instrumented telescopes referred to as magnetographs. Some magnetographs can only measure the component of the magnetic field along the line of sight from the observer to the source (the field's "longitudinal" component). One example of such a "line-of-sight" or "longitudinal" magnetograph is the Michelson Doppler Imager (MDI), a scientific instrument that takes magnetograms of the Sun in order to measure velocity and magnetic fields in the Sun's photosphere to learn about the convection zone and about the magnetic fields which control the structure of the solar corona. A vector magnetograph also measures the component of the magnetic field perpendicular to the line of sight (the field's "transverse" component), from which all three components of the magnetic field vector can be deduced. Two examples include the National Solar Observatory's SOLIS instrument and the Helioseismic and Magnetic Imager aboard NASA's Solar Dynamics Observatory satellite.
Dataset Citation
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Dataset Identifiers
- Chromosphere_Magnetogram_Wilcox
ISO 19115-2 Metadata
gov.noaa.ngdc.stp.solar_imagery:Chromosphere_Magnetogram_Wilcox
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Distribution Formats | Format not available |
Distributor | William Denig DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (303) 497-6323 solar.ngdc@noaa.gov |
Dataset Point of Contact | William Denig DOC/NOAA/NESDIS/NCEI > National Centers for Environmental Information, NESDIS, NOAA, U.S. Department of Commerce (303) 497-6323 solar.ngdc@noaa.gov |
Coverage Description | Non-geographic |
Time Period | 1999-01-01 to 2010-12-30 |
Spatial Bounding Box Coordinates | Non-geographic |
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Data Presentation Form | Digital document - digital representation of a primarily textual item (can contain illustrations also) |
Dataset Progress Status | Complete |
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Supplemental Information | The NOAA National Centers for Environmental Information (formally NGDC) provides scientific data stewardship of solar-terrestrial datasets in compliance with NOAA Administrative Order (NAO 212-15), "Management of Environmental Data and Information", published 04 Nov 10. Scientific Data Stewardship includes the Archive, Access, and Assessment (AAA) of operational and related solar and space environmental datasets. |
Purpose | Scientific data stewardship of solar-terrestrial datasets in compliance with NOAA Administrative Order (NAO) 212-12, "Management of Environmental and Geospatial Data and Information", dated 04 Nov 10. Scientific Data Stewardship includes the Archive, Access, and Assessment (AAA) of operational and related solar and space environmental datasets. |
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Use Constraints | No constraint information available |
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Last Modified: 2016-12-27
For questions about the information on this page, please email: Karen.E.Horan@noaa.gov
For questions about the information on this page, please email: Karen.E.Horan@noaa.gov