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SDO/HMI Vector Magnetic Field

(2011). SDO/HMI Vector Magnetic Field. [Data set]. Stanford University. https://doi.org/10.48322/qa09-xp16. Accessed on .

Note: Proper references, including or other formats, should include the "Accessed on date" to identify the version of the resource being cited in a given publication.

ResourceID
spase://NASA/NumericalData/SDO/HMI/Vector_Magnetic_Field/PT720S

Description
The vector magnetic field is derived from full-disk filtergrams collected in a 135-second sequence. (90 seconds after 13 April 2016). The observations are obtained in polarized light at several wavelengths across a spectral line. The filtergrams are calibrated and registered to account for solar rotation before being combined to provide Stokes polarization parameters. The parameters are used to determine the magnetic and other plasma parameters using VFISV, a Milne-Eddington inversion code. The final step is to disambiguate the data, that is to infer the azimuthal direction of the transverse field.

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 may be subject to a different license.

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Details

Version:2.7.1

NumericalData

ResourceID
spase://NASA/NumericalData/SDO/HMI/Vector_Magnetic_Field/PT720S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SDO/HMI Vector Magnetic Field
DOI
https://doi.org/10.48322/qa09-xp16
ReleaseDate
2025-12-04 13:31:27Z
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
2025-09-18 11:27:09Z
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 14:25:19Z
Note
Updated PublishedBy name to match ROR Registry. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:31:27Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
Description
The vector magnetic field is derived from full-disk filtergrams collected in a 135-second sequence. (90 seconds after 13 April 2016). The observations are obtained in polarized light at several wavelengths across a spectral line. The filtergrams are calibrated and registered to account for solar rotation before being combined to provide Stokes polarization parameters. The parameters are used to determine the magnetic and other plasma parameters using VFISV, a Milne-Eddington inversion code. The final step is to disambiguate the data, that is to infer the azimuthal direction of the transverse field.
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.B_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
Magnetogram
TemporalDescription
TimeSpan
StartDate
2010-05-01 00:00:00
RelativeStopDate
-P3D
Cadence
PT720S
ObservedRegion
Sun
ObservedRegion
Sun.Photosphere
Parameter #1
Name
FITS Data Array
Description
Vector magnetic field strength
Cadence
PT720S
Units
gauss
Field
Qualifier
Vector
FieldQuantity
Magnetic
SpatialCoverage
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HPC
Description
Array size: 4096x4096 Pixel Resolution: 0.504 arcsec
NASA Insignia
Contact SPDF: NASA-SPDF Feedback/Support
Responsible NASA Official: Robert M. Candey
Site Editor: Tami Kovalick
SPDF ROR ID
SPDF re3data ID
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Last Updated: 2025-12-04