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Data Access
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JSOC Data Center
SDO/HMI Data Search via Virtual Solar Observatory
SDO/HMI Continuum, 720-Second Data
var authors='The HMI Consortium: Stanford University (USA); NASA Goddard Space Flight Center (USA); Lockheed Martin Solar and Astrophysics Laboratory (USA); National Center for Atmospheric Research (USA)';
document.write(authors);
(2011).
SDO/HMI Continuum, 720-Second Data.
[Data set].
Stanford University.
https://doi.org/10.48322/ze6r-3m97. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/SDO/HMI/Continuum_Intensity/PT720S
Description
The HMI continuum data refers to map of the continuum intensity of the solar spectrum in the region of the Fe I absorption line at 6173 Å on the surface of the sun.
HMI samples the Fe I absorption line at 6173.3 Å at six points. Assuming that the "pure" solar Fe I line profile is a Gaussian, and the HMI filter filter transmission profiles are delta functions, the first and second Fourier coefficients of the of the Fe I line can be calculated and an estimate of the Doppler Velocity can be made. An estimate (proxy) for the continuum intensity Ic is obtained by "reconstructing" the solar line from the estimates of the Doppler shift λo, the linewidth σ, and the linedepth Id. More details can be found at http://jsoc.stanford.edu/relevant_papers/observables.pdf.
Metadata Rights
CC0-1.0:
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available SPASE metadata descriptions. The actual data/software may be subject to a different license.
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Details
Version:2.7.1
NumericalData
ResourceID
spase://NASA/NumericalData/SDO/HMI/Continuum_Intensity/PT720S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SDO/HMI Continuum, 720-Second Data
DOI
https://doi.org/10.48322/ze6r-3m97
ReleaseDate
2025-12-04 13:31:25Z
RevisionHistory
RevisionEvent
ReleaseDate
2024-11-01 00:08:46
Note
Metadata created by SY
RevisionEvent
ReleaseDate
2024-11-18 00:08:46
Note
Added DOI by SY
RevisionEvent
ReleaseDate
2025-08-04 00:08:46
Note
Added HelioViewerID to Extension
RevisionEvent
ReleaseDate
2025-09-18 11:27:08Z
Note
Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Matched version number in schemaLocation attribute to updated value in Version tag. ZCB
RevisionEvent
ReleaseDate
2025-09-30 14:25:17Z
Note
Updated PublishedBy name to match ROR Registry. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:31:25Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
Description
The HMI continuum data refers to map of the continuum intensity of the solar spectrum in the region of the Fe I absorption line at 6173 Å on the surface of the sun.
HMI samples the Fe I absorption line at 6173.3 Å at six points. Assuming that the "pure" solar Fe I line profile is a Gaussian, and the HMI filter filter transmission profiles are delta functions, the first and second Fourier coefficients of the of the Fe I line can be calculated and an estimate of the Doppler Velocity can be made. An estimate (proxy) for the continuum intensity Ic is obtained by "reconstructing" the solar line from the estimates of the Doppler shift λo, the linewidth σ, and the linedepth Id. More details can be found at http://jsoc.stanford.edu/relevant_papers/observables.pdf.
PublicationInfo
Authors
The HMI Consortium: Stanford University (USA); NASA Goddard Space Flight Center (USA); Lockheed Martin Solar and Astrophysics Laboratory (USA); National Center for Atmospheric Research (USA)
PublicationDate
2011-01-21 00:00:00
PublishedBy
Stanford University
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Philip.H.Scherrer
2.
GeneralContact
spase://SMWG/Person/Rick.Bogart
InformationURL
Name
The HMI website at Stanford
URL
http://hmi.stanford.edu/
InformationURL
Name
The SDO/HMI Instrument paper
URL
https://doi.org/10.1007/s11207-011-9834-2
AccessInformation
RepositoryID
spase://SMWG/Repository/Stanford/HMI-AIA.JSOC
Availability
Online
AccessRights
Open
AccessURL
Name
JSOC Data Center
URL
http://jsoc.stanford.edu/ajax/lookdata.html?ds=hmi.Ic_720s[2020-01-01T00:00:00/60m]
Style
Search
Description
Change the date and the time to find the HMI data.
AccessURL
Name
SDO/HMI Data Search via Virtual Solar Observatory
URL
https://sdac.virtualsolar.org/cgi/search?time=1&instrument=HMI&spectrum=1&version=current&build=1
Description
VSO path to JSOC-resident SDO HMI data files
Format
FITS
InstrumentIDs
spase://SMWG/Instrument/SDO/HMI
MeasurementType
ImageIntensity
TemporalDescription
TimeSpan
StartDate
2010-04-24 19:11:26
RelativeStopDate
-P3D
Cadence
PT720S
ObservedRegion
Sun
ObservedRegion
Sun.Photosphere
Parameter #1
Name
FITS Data Array
Description
Continuum Intensity
Cadence
PT720S
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HPC
Wave
WaveType
Photon
WaveQuantity
Intensity
WavelengthRange
Low
6173
High
6173
Units
angstrom
SpatialCoverage
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HPC
Description
Array size: 4096x4096
Pixel Resolution: 0.504 arcsec
Extension
HelioViewerID
18