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Metadata Identifier: gov.noaa.ngdc.stp.solar:G00039

Aggregation Info | Bands | Citations | Constraints | Coverage Descriptions | Dimensions | Extents | Formats | Geographic Bounding Box
Georectified Information | Georeferenceable Information | Identifiers | Instruments | Mediums | OnlineResources | Operations
Platforms | Process Steps | Range Elements | Reference Systems | Responsible Parties | Series | Sources | Spatial Grids | Temporal Extents

MD_DataIdentification

Count Component Title Abstract
1 Solar Brightness and Magnetic Discontinuities Collected by the Solar Observing Optical Network (SOON) This data file consists of solar brightness and magnetic discontinuities collected by the Solar Observing Optical Network (SOON). SOON consists of up to five US Air Force Air Weather Service observatories. The Air Force operates five solar telescopes distributed in longitude to maintain continuous coverage to monitor solar active regions at optical wavelengths. GDC archives histograms of intensity versus area every minute for the active regions as well as magnetograms of the magnetic field structure and tachograms of plasma velocities on an irregular schedule. The basic SOON telescope is a 25-centimeter evacuated refractor mounted on a polar axis. It has a tunable monochromatic filter centered on the hydrogen-alpha absorption line (6562.8A) of the solar spectrum. Shifting the filter characteristics slightly off center from the H-alpha peak results in pictures of the solar surface region at differing depths. Corresponding to the optical images of solar regions are the digital "brightness-area" data. These data are often plotted as brightness-area histograms for a particular time or, in a 3-3-dimensional display, showing a time sequence of changing intensity of optical emissions from areas of solar active regions. Each digital scan of a region describes the amount of solar surface area within a pre-set rectangular viewing grid that is of brightness level N, where N ranges from 1 to 64 and represents the gray scale range from black to white. The automatic capability of the SOON telescope system allows the rapid collection of this brightness-area information on many active regions on the sun. By using these data, quantitative measures, including instability, growth/decay rates, and precise areas for each active solar region, can be determined.
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SV_Identification

none found
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CI_Citation

Count Component Title Date Citation Identifier
1 NASA/GCMD Data Center Keywords
    1 NASA/GCMD Location Keywords
      1 GCMD Science Keywords NASA/Global Change Master Directory (GCMD) Earth Science Keywords
      • 2007-04
      1 Solar Brightness and Magnetic Discontinuities Collected by the Solar Observing Optical Network (SOON)
      • 1977
      SOON
      1 Uncontrolled Keywords
        1 Uncontrolled Location Keywords
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          CI_Series

          none found
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          CI_ResponsibleParty

          Count Component Individual Organization Position Email Role Linkage
          1 DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce publisher
          1 DOD/USAF/AFWA > Air Force Weather Agency, USAF, U.S. Department of Defense originator
          1 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 resourceProvider http://gcmd.gsfc.nasa.gov/Resources/valids/archives/keyword_list.html
          3 Solar Data Manager DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce solar.ngdc@noaa.gov pointOfContact
          1 Solar Data Manager DOC/NOAA/NESDIS/NGDC > National Geophysical Data Center, NESDIS, NOAA, U.S. Department of Commerce solar.ngdc@noaa.gov distributor
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          CI_OnlineResource

          Count Component Linkage Name Description Function
          1 ftp://ftp.ngdc.noaa.gov/STP/SOLAR_DATA/SOLAR_IMAGES/
          1 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. information
          1 http://www.afweather.af.mil/
          1 http://www.ngdc.noaa.gov/stp/SOLAR/ftpsolarimages.html
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          MD_Identifier or RS_Identifier

          Count Component Code
          1 SOON
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          EX_Extent

          Bounding Box Temporal Extent
          Count Component Description West East North South Start End
          1 1977-01-01
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          EX_GeographicBoundingBox

          none found
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          EX_TemporalExtent

          Count Component Start End
          1 1977-01-01
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          MD_Format

          Count Component Name Version specification
          1 ASCII
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          MD_Medium

          Count Component Name mediumFormat mediumNote
          1 dvd iso9660
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          MD_Constraints

          Count Component Use Limitation
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          MD_ReferenceSystem

          none found
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          MD_GridSpatialRepresentation

          none found
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          MD_Georeferenceable or MI_Georeferenceable

          none found
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          MD_Georectified or MI_Georectified

          none found
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          MD_Dimension

          none found
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          MD_CoverageDescription or MI_CoverageDescription

          none found
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          MD_Band or MI_Band

          none found
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          MI_RangeElementDescription

          none found
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          MD_AggregateInformation

          none found
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          LE_Source or LI_Source

          none found
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          LE_ProcessStep or LI_ProcessStep

          none found
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          MI_Operation

          none found
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          MI_Platform

          none found
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          MI_Instrument

          none found
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