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Metadata Identifier: gov.noaa.ngdc.stp.solar:G00538
MD_DataIdentification
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Solar Corona |
The solar corona is the outermost layer of the sun's atmosphere--a very hot
halo (millions of degrees), that, in the form of the solar wind, extends well past
the Earth's orbit. The corona is observed in detail during solar eclipses. In practice,
the corona is observed routinely by ground-based and satellite coronagraphs in the
red line Fe X (634.7nm -- ten times ionized iron line) and the green line Fe XIV (530.3
nm -- 14 times ionized iron line), and occasionally in the high energy yellow line
Ca XV (569.4 nm -- 15 times ionized Calcium line). White light observations of the
solar corona are also made routinely, and used for detecting coronal mass ejections
(CMEs) that may affect the Earth. The coronagraph is a special telescope with an occulting
disk to block the direct light of the sun and thus able to measure the brightness
of the fainter and less dense corona. The intensities are recorded in tabular form,
historically in 5-degree increments around the sun's disk. The data center holds data
in analog form from 12 stations covering the period 1943 to present. Currently, 2
stations send daily coronal scans to the data center. A coronal activity index from
Lomnicky Stit, Slovak Republic, 1939-present, is also available. Coronal data exhibit
the 11 year solar cycle variation. Solar X-ray measurements since 1991 by the Yohkoh
and GOES Solar X-ray Imager (SXI) satellites allow continuous coverage of the constantly
changing hot solar corona.
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SV_Identification
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NASA/GCMD Data Center Keywords |
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NASA/GCMD Location Keywords |
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GCMD Science Keywords |
NASA/Global Change Master Directory (GCMD) Earth Science Keywords |
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Solar Corona |
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Downloadable Data |
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Uncontrolled Keywords |
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Solar Geophysical Data (SGD) International Standard Serial Numbers
(ISSN)
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ISSN 0038-0911 Solar Geophysical Data Solar Geophysical Data (SGD)
Published Monthly
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DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce (comp.)
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publisher |
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Lommicky Stit, Slovakia |
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originator |
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NASA/GSFC/SED/ESD/GCDC/GCMD > Global Change Master Directory, Global Change Data Center,
Earth Sciences Division, Science and Exploration Directorate, Goddard Space
Flight Center, NASA
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resourceProvider |
http://gcmd.gsfc.nasa.gov/Resources/valids/archives/keyword_list.html |
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Solar Data Manager |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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solar.ngdc@noaa.gov |
pointOfContact |
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Solar Data Manager |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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solar.ngdc@noaa.gov |
distributor |
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Solar Data Manager |
DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department
of Commerce
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solar.ngdc@noaa.gov |
custodian |
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ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SOLAR_CORONA |
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http://gcmd.gsfc.nasa.gov/Resources/valids/archives/keyword_list.html |
GCMD Keywords, Version 6.0.0.0.0 |
Thesuarus for earth science keywords and associated directories hosted and maintained
by NASA.
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information |
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http://sxi.ngdc.noaa.gov/sxi/servlet/sxisearch |
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http://www.ngdc.noaa.gov/stp/SOLAR/ftpsolarcorona.html |
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Bounding Box |
Temporal Extent |
| 1 |
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1939 |
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