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JSOC Data Center
SHARP Near-Real-Time 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);
(2012).
SHARP Near-Real-Time Data.
[Data set].
Stanford University.
https://doi.org/10.48322/hsx6-rz81. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/SDO/HMI/SHARP/NRT/PT720S
Description
SHARP Near Real Time data in CCD coordinates.
SHARP stands for Space-weather HMI Active Region Patch. A SHARP is a DRMS series that contains (1) various space-weather quantities calculated from the photospheric vector magnetogram data and stored as FITS header keywords, and (2) 31 data segments (described in detail below), including each component of the vector magnetic field, the line-of-sight magnetic field, continuum intensity, doppler velocity, error maps and bitmaps. The data segments are not full-disk; rather, they are partial-disk, automatically-identified active region patches. SHARPs are calculated every 12 minutes. Often, there is more than one active region on the solar disk at any given time. Thus, SHARPs are indexed by two prime keys: time, T_REC, and HMI Active Region Patch Number, HARPNUM.
Note that HARPNUMs in the nrt and defnitive data series will be different.
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/SHARP/NRT/PT720S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
SHARP Near-Real-Time Data
DOI
https://doi.org/10.48322/hsx6-rz81
ReleaseDate
2026-06-26 13:27:57Z
RevisionHistory
RevisionEvent
ReleaseDate
2024-11-02 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 14:25:18Z
Note
Updated PublishedBy name to match ROR Registry. ZCB
RevisionEvent
ReleaseDate
2025-12-04 13:31:26Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:27:57Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB
Description
SHARP Near Real Time data in CCD coordinates.
SHARP stands for Space-weather HMI Active Region Patch. A SHARP is a DRMS series that contains (1) various space-weather quantities calculated from the photospheric vector magnetogram data and stored as FITS header keywords, and (2) 31 data segments (described in detail below), including each component of the vector magnetic field, the line-of-sight magnetic field, continuum intensity, doppler velocity, error maps and bitmaps. The data segments are not full-disk; rather, they are partial-disk, automatically-identified active region patches. SHARPs are calculated every 12 minutes. Often, there is more than one active region on the solar disk at any given time. Thus, SHARPs are indexed by two prime keys: time, T_REC, and HMI Active Region Patch Number, HARPNUM.
Note that HARPNUMs in the nrt and defnitive data series will be different.
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
2012-09-14 02:12:00Z
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
Spaceweather HMI Active Region Patch (SHARP)
URL
http://jsoc.stanford.edu/doc/data/hmi/sharp/sharp.htm
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.sharp_720s_nrt
Style
Search
Description
Change the date and the time to find the HMI data.
Format
FITS
InstrumentIDs
spase://SMWG/Instrument/SDO/HMI
MeasurementType
Magnetogram
TemporalDescription
TimeSpan
StartDate
2012-09-14 02:12:00Z
RelativeStopDate
-P 3H
Cadence
PT720S
ObservedRegion
Sun
ObservedRegion
Sun.Photosphere
Parameter #1
Name
USFLUX in the FITS Header
Description
Total unsigned flux
Units
Mx
Field
Qualifier
Total
FieldQuantity
Magnetic
Parameter #2
Name
MEANGAM in the FITS Header
Description
Mean inclination angle, gamma
Units
degree
Field
Qualifier
Average
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #3
Name
MEANGBT in the FITS Header
Description
Mean value of the total field gradient
Units
Gauss/Mm
Field
Qualifier
Average
Qualifier
Differential
FieldQuantity
Magnetic
Parameter #4
Name
MEANGBZ in the FITS Header
Description
Mean value of the vertical field gradient
Units
Gauss/Mm
Field
Qualifier
Average
Qualifier
Differential
FieldQuantity
Magnetic
Parameter #5
Name
MEANGBH in the FITS Header
Description
Mean value of the horizontal field gradient
Units
Gauss/Mm
Field
Qualifier
Average
Qualifier
Differential
FieldQuantity
Magnetic
Parameter #6
Name
MEANJZD in the FITS Header
Description
Mean vertical current density
Units
mA/m^2
Field
Qualifier
Average
FieldQuantity
CurrentDensity
Parameter #7
Name
TOTUSJZ in the FITS Header
Description
Total unsigned vertical current
Units
Amperes
Field
Qualifier
Total
FieldQuantity
Current
Parameter #8
Name
MEANALP in the FITS Header
Description
Mean current helicity
Units
G^2/m
Support
SupportQuantity
Other
Parameter #9
Name
TOTUSJH in the FITS Header
Description
Total unsigned current helicity
Units
G^2/m
Support
SupportQuantity
Other
Parameter #10
Name
ABSNJZH in the FITS Header
Description
Absolute value of the net current helicity
Units
G^2/m
Support
SupportQuantity
Other
Parameter #11
Name
SAVNCPP in the FITS Header
Description
Sum of the Absolute Value of the Net Currents Per Polarity
Units
Amperes
Field
FieldQuantity
Current
Parameter #12
Name
MEANPOT in the FITS Header
Description
Mean photospheric excess magnetic energy density
Units
ergs/cm^3
Field
Qualifier
Average
FieldQuantity
Potential
Parameter #13
Name
TOTPOT in the FITS Header
Description
Total photospheric magnetic energy density
Units
ergs/cm^3
Field
Qualifier
Total
FieldQuantity
Potential
Parameter #14
Name
SHRGT45 in the FITS Header
Description
Percentage of pixels with a mean shear angle greater than 45 degrees
Units
percent
Support
SupportQuantity
Other
Parameter #15
Name
MAGNETOGRAM
Description
The magnetogram segment contains HARP-sized line-of-sight magnetogram data from the DRMS series hmi.M_720s.
Units
gauss
Field
FieldQuantity
Magnetic
Parameter #16
Name
BITMAP
Description
The bitmap segment identifies the pixels located within the smooth bounding curve by labeling each pixel with the following:
1 : weak field outside smooth bounding curve
2 : strong field outside smooth bounding curve
33 : weak field inside smooth bounding curve
34 : strong field inside smooth bounding curve
Units
dimensionless
Support
SupportQuantity
Other
Parameter #17
Name
DOPPLERGRAM
Description
The dopplergram segment contains HARP-sized dopplergram data from the DRMS series hmi.V_720s.
Units
m/s
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #18
Name
CONTINUUM
Description
The dopplergram segment contains HARP-sized dopplergram data from the DRMS series hmi.Ic_720s.
Units
DN/s
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #19
Name
INCLINATION
Description
The inclination segment contains the magnetic field inclination with respect to the line-of-sight.
Units
degree
Field
Qualifier
DirectionAngle
FieldQuantity
Magnetic
Parameter #20
Name
AZIMUTH
Description
The azimuth segment contains the magnetic field azimuth. Zero corresponds to the up direction of a column of pixels on HMI’s CCD; values increase counter-clockwise.
Units
degree
Field
Qualifier
DirectionAngle.AzimuthAngle
FieldQuantity
Magnetic
Parameter #21
Name
FIELD
Description
The field segment contains the magnetic field strength. Currently, the filling factor is equal to unity, so this quantity is representative of the magnetic flux density. It is hard to give a single 'uncertainly' value because of the difference in noise between the line-of-sight and transverse field components. Values of 220 Mx/cm2 or less are generally considered to be noise.
Units
gauss
Field
FieldQuantity
Magnetic
Parameter #22
Name
VLOS_MAG
Description
The vlos_mag segment contains the velocity of the plasma along the line-of-sight. Positive means redshift. [Note: These data are in cm/s, whereas the dopplergram data are in m/s.]
Units
cm/s
Particle
ParticleType
Ion
ParticleQuantity
Velocity
Parameter #23
Name
DOP_WIDTH
Description
The dop_width segment contains the doppler width of the spectral line, computed as if it were assumed to be a Gaussian.
Units
mÅ
Wave
WaveType
Electromagnetic
WaveQuantity
Wavelength
Parameter #24
Name
ETA_0
Description
The eta_0 segment contains the center-to-continuum absorption coefficient.
Units
dimensionless
Wave
WaveQuantity
Absorption
Parameter #25
Name
DAMPING
Description
The damping segment contains the electron dipole oscillation approximated as a simple harmonic oscillator. In the current version of the code, this parameter is constant and set to 0.5.
Units
mÅ
Wave
WaveType
Electromagnetic
WaveQuantity
Wavelength
Parameter #26
Name
SRC_CONTINUUM
Description
The src_continuum segment contains the source function at the base of the photosphere. In the Milne-Eddington approximation, the source function varies linearly with optical depth.
Units
DN/s
Wave
WaveType
Photon
WaveQuantity
Intensity
Parameter #27
Name
SRC_GRAD
Description
The src_grad segment contains gradient of the source function with optical depth. By definition, src_continuum + src_grad = observed continuum intensity.
Units
DN/s
Wave
WaveType
Electromagnetic
WaveQuantity
Intensity
Parameter #28
Name
ALPHA_MAG
Description
The segment alpha_mag is defined as the portion of the resolution element that is filled with magnetized plasma. However, in the current version of the code, this parameter is constant and set to unity.
Units
dimensionless
Support
SupportQuantity
Other
Parameter #29
Name
CHISQ
Description
The segment chisq is a measure of how well the profiles are fit in the least squares iteration. Chisq is not normalized.
Units
dimensionless
Support
SupportQuantity
Other
Parameter #30
Name
CONV_FLAG
Description
This is currently not calcuated.
Units
dimensionless
Support
SupportQuantity
Other
Parameter #31
Name
INFO_MAP
Description
The info_map segment identifies the quality index of the inversion output. The higher bits are filled by the inversion module, while the lower ones are updated during the disambiguation step (see below). The index of the higher bits at each pixel is defined as follows:
0x00000000 : Good pixel, with no severe issue.
0x0[0-6]00000 : Same as the convergence index in CONV_FLAG
0x08000000 : Bad pixel, defined as the same criteria as #5 of CONFID_MAP.
0x10000000 : Low Q or U signal. sqrt((Q_0 + ··· + Q_5)^2 + (U_0 + ··· + U_5)^2) was smaller than 0.206 sqrt(I_0 + ··· + I_5 )
0x20000000 : Low V signal; |V_0| + |V_1| + ··· + |V_5| was smaller than 0.206 sqrt(I_0 + ··· + I_5 )
0x40000000 : Low B_los value. |Blos| from magnetogram algorithm was smaller than 6.2 Gauss.
0x80000000 : Missing data
Support
SupportQuantity
Other
Parameter #32
Name
CONFID_MAP
Description
The confid_map segment identifies the confidence index of the inversion output. The index value at each pixel will take the integer value from 0 (best) to 6(worst), defined as the highest item number satisfying the following conditions:
0: No issue found in the input Stokes
1: Signals for the transverse field component in the input Stokes parameters (Q & U) were weak.
2: Signal for the line-of-sight field component in the input Stokes parameters (V) was weak.
3: Magnetic field signals of both LoS and transverse component were weak.
4: The ME-VFISV iteration did not converge within the iteration maximum.
In the test data release, we set very small , thus, the confidence ε index at most pixels may be 4.
5: If the difference between the absolute value of the line-of-sight field strength derived from magnetogram algorithm and the absolute value of the LoS component from VFISV inversion |B cos(inclination)| is greater than 500 Gauss, we regard the inversion did not well solve the problem.
6: One (or more) of the 24 input Stokes arrays had NaN value.
Units
dimensionless
Support
SupportQuantity
Other