Data Access

SDO/HMI Vector Magnetic Field

Name: SDO/HMI Vector Magnetic Field
Creator: 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)
Published: 2011-01-21
License: https://cdla.io/permissive-1-0/

(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/software 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

2026-07-21 12:07:12Z

RevisionHistory

RevisionEvent

ReleaseDate

2024-11-01 00:08:46Z

Note

Metadata created by SY

RevisionEvent

ReleaseDate

2024-11-18 00:08:46Z

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

RevisionEvent

ReleaseDate

2026-06-26 13:27:58Z

Note

Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB

RevisionEvent

ReleaseDate

2026-07-21 12:07:12Z

Note

Added HelioData InformationURL. JWL

Description

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 00:00:00Z

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

InformationURL

Name

HelioData

URL

https://helio.data.nasa.gov/dataset/SDO_HMI_Vector_Magnetic_Field_PT720S

Description

The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.

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

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 00:00:00Z

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