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Data Access
MMS Science Data Center QuickLook Plots
MMS Science Data Center File Browser
MMS Fields 2 hour Combined Magnetic Field QuickLook plots
var authors='Burch, James L.; Ergun, Robert E.; Contel, Olivier L.; Russell, Christopher T.';
document.write(authors);
(2025).
MMS Fields 2 hour Combined Magnetic Field QuickLook plots.
[Data set].
Laboratory for Atmospheric and Space Physics.
https://doi.org/10.48322/9cm9-bm91. Accessed on document.write(currentDateStr);.
Note: Proper references, including
Copy BibTeX Citation
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/DisplayData/MMS/FIELDS/MagneticField/QL.PNG.PT120M
Description
dataset contains PNG format plots of 2 hour duration Magnetic Field QuickLook time series (Btot, and Bx, By, Bz in GSM-DMPA coordinates and Bx, By, Bz in DMPA coordinates*) and 3-component survey spectrograms for MMS1, MMS2, MMS3, MMS4 from the Fields suite on the MMS spacecraft.
Also available within the same directory are 6-hour, 12-hour, and 24-hour plots. Magnetic field quicklook spectrograms also appear in the individual spacecraft summary plots all_mms1_summ, all_mms2_summ, all_mms3_summ, and all_mms4_summ.
At the top of each image is a title and a status bar indicating operational status for Fast and Burst mode over the time period of the plots. Immediately above the time labels on the horizontal axis are ephemeris data: Cartesian GSE coordinates and radial distance of the MMS1 spacecraft in units of Earth radii.
-------
(*)From the FGM Data Products Guide:
Quicklook data have the best available calibration at the time of downlink applied and are not intended for scientific analysis.
Quicklook provides time series plots in .png format of FGM data, which is derived from either DFG or AFG.
Magnetic field data is provided in Despun Major Principal Axis of inertia (DMPA) coordinates, which is considered to be a ‘near-GSE’ coordinate system. That is, no attitude data has been applied, other than to despin using the on-board sun pulse times. The DMPA Z-axis is the aligned with the Major Principal Axis (MPA). In nominal operations, the MPA is maintained to be within 3 degrees of the GSE Z-axis (ecliptic normal). Thus, within the Region of Interest (ROI), DMPA should be within 3 degrees of alignment with true GSE coordinates. The MPA can
be assumed to fixed in inertial space and aligned with the Angular Momentum vector, except in the presence of nutation. For the first year since launch, nutation has been observed to be minimal, and generally damped within hours after spacecraft maneuvers.
In addition, a GSE to GSM transformation is applied to the DMPA data to yield data in what is termed GSM-DMPA coordinates. For a formal discussion of coordinate systems, see the MMS Project Coordinate System and Alignment Document (461-SYS-SPEC-0115C, or most recent version).
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
DisplayData
ResourceID
spase://NASA/DisplayData/MMS/FIELDS/MagneticField/QL.PNG.PT120M
NamingAuthority
NASA
ResourceType
DisplayData
ResourceHeader
ResourceName
MMS Fields 2 hour Combined Magnetic Field QuickLook plots
AlternateName
fields_mms_bfield
DOI
https://doi.org/10.48322/9cm9-bm91
ReleaseDate
2026-06-26 15:10:49Z
RevisionHistory
RevisionEvent
ReleaseDate
2020-07-07 19:48:34Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2025-11-14 16:17:30Z
Note
Added PublicationInfo. 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
2025-12-04 13:28:00Z
Note
Added MetadataRightsList. Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-02-25 17:08:11Z
Note
Added DOI. TLK
RevisionEvent
ReleaseDate
2026-06-26 15:10:49Z
Note
Add 'Z' to TemporalDescription:TimeSpan:StartDate. ZCB
Description
dataset contains PNG format plots of 2 hour duration Magnetic Field QuickLook time series (Btot, and Bx, By, Bz in GSM-DMPA coordinates and Bx, By, Bz in DMPA coordinates*) and 3-component survey spectrograms for MMS1, MMS2, MMS3, MMS4 from the Fields suite on the MMS spacecraft.
Also available within the same directory are 6-hour, 12-hour, and 24-hour plots. Magnetic field quicklook spectrograms also appear in the individual spacecraft summary plots all_mms1_summ, all_mms2_summ, all_mms3_summ, and all_mms4_summ.
At the top of each image is a title and a status bar indicating operational status for Fast and Burst mode over the time period of the plots. Immediately above the time labels on the horizontal axis are ephemeris data: Cartesian GSE coordinates and radial distance of the MMS1 spacecraft in units of Earth radii.
-------
(*)From the FGM Data Products Guide:
Quicklook data have the best available calibration at the time of downlink applied and are not intended for scientific analysis.
Quicklook provides time series plots in .png format of FGM data, which is derived from either DFG or AFG.
Magnetic field data is provided in Despun Major Principal Axis of inertia (DMPA) coordinates, which is considered to be a ‘near-GSE’ coordinate system. That is, no attitude data has been applied, other than to despin using the on-board sun pulse times. The DMPA Z-axis is the aligned with the Major Principal Axis (MPA). In nominal operations, the MPA is maintained to be within 3 degrees of the GSE Z-axis (ecliptic normal). Thus, within the Region of Interest (ROI), DMPA should be within 3 degrees of alignment with true GSE coordinates. The MPA can
be assumed to fixed in inertial space and aligned with the Angular Momentum vector, except in the presence of nutation. For the first year since launch, nutation has been observed to be minimal, and generally damped within hours after spacecraft maneuvers.
In addition, a GSE to GSM transformation is applied to the DMPA data to yield data in what is termed GSM-DMPA coordinates. For a formal discussion of coordinate systems, see the MMS Project Coordinate System and Alignment Document (461-SYS-SPEC-0115C, or most recent version).
Acknowledgement
The terms for distribution and use of the MMS data products are specified in the NASA Heliophysics Science Data Management Policy document, and are summarized here in terms of the MMS mission. These guidelines govern both the production and distribution of scientific data sets by the MMS program, and also use of the MMS data by the science community and general public, and are summarized below.
Users should use QuickLook data plots for event browsing, and not for scientific analysis or publication without express consent of the PI and relevant Lead Co-Investigators.
1. MMS-SMART data products are open to all scientists and the public (Users).
2. There are no proprietary periods associated with any of the MMS-SMART data products.
3. Users shall have timely access to the scientifically useful data and analysis tools that are equivalent to the level that the MMS-SMART science working team uses.
4. Users should contact the MMS-SMART Principal Investigator (PI) and the relevant lead co-investigators of the instrument or modeling group early in an analysis project to consult on the appropriate use of instrument data or model results.
5. Users who wish to publish results derived from MMS data should directly involve the MMS-SMART PI and/or Instrument Leads and team members as appropriate in the analysis and are encouraged to offer co-authorship. Co-authorship may be declined.
6. Users should heed the caveats of investigators as to the interpretation and limitations of data or model results. All important caveats should be included in the publication, even if co-authorship is declined. Data and model version numbers should also be specified.
7. Users should acknowledge the sources of data used in all publications, presentations, and reports. Appropriate acknowledgement to institutions, personnel, and funding agencies should be given.
8. Users should provide the MMS-SMART PI and/or instrument Lead CoIs a copy of each manuscript that uses MMS-SMART data upon submission of that manuscript for consideration of publication. Upon publication, the citation should be transmitted to the PI and any other providers of data.
9. Users should widely distribute, to interested parties, their conference abstracts, presentations, and publications.
10. Users should make tools of general utility and/or value-added data products widely available to the community, and to notify the MMS-SMART PI of such utilities or products, having clearly labeled the product as being different from an original MMS-SMART produced data product.
References:
NASA Heliophysics Science Data Management Policy, version 1.1, April 12, 2009,
https://hpde.gsfc.nasa.gov/Heliophysics_Data_Policy_2009Apr12.pdf
NASA MMS Science Data Management Plan: SwRI Document 10160.18-PDMP-01
PublicationInfo
Authors
Burch, James L.; Ergun, Robert E.; Contel, Olivier L.; Russell, Christopher T.
PublicationDate
2025-11-14 16:17:30Z
PublishedBy
Laboratory for Atmospheric and Space Physics
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/James.L.Burch
2.
PrincipalInvestigator
spase://SMWG/Person/Robert.E.Ergun
3.
PrincipalInvestigator
spase://SMWG/Person/Olivier.Le.Contel
4.
PrincipalInvestigator
spase://SMWG/Person/Christopher.T.Russell
5.
MetadataContact
spase://SMWG/Person/Leonard.N.Garcia
InformationURL
Name
The Magnetospheric Multiscale (MMS) Mission home page at Goddard Space Flight Center (GSFC)
URL
https://mms.gsfc.nasa.gov/
Description
The Magnetospheric Multiscale (MMS) Mission Home Page hosted by the Goddard Space Flight Center (GSFC).
PriorIDs
spase://VSPO/DisplayData/MMS/FIELDS/MagneticField/QL.PNG.PT120M
AccessInformation
RepositoryID
spase://SMWG/Repository/UCOLO/LASP/MMS_SDC
Availability
Online
AccessRights
Open
AccessURL
Name
MMS Science Data Center QuickLook Plots
URL
https://lasp.colorado.edu/mms/sdc/public/plots/#/quicklook/
ProductKey
fields_mms_bfield
Description
Web interface to plot viewer. Interface allows choice of plot type, date, plot duraction (24 hour, 12 hour, 2 hour) and the ability to step through the plots. There is also a direct download link.
Format
PNG
Encoding
None
AccessInformation
RepositoryID
spase://SMWG/Repository/UCOLO/LASP/MMS_SDC
Availability
Online
AccessRights
Open
AccessURL
Name
MMS Science Data Center File Browser
URL
https://lasp.colorado.edu/mms/sdc/public/about/browse-wrapper/
ProductKey
/mms/sdc/public/data/sdc/ql/fields_mms_bfield
Description
Interface to the MMS SDC directory tree.
Format
PNG
Encoding
None
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/MMS/1/FIELDS/ADP
spase://SMWG/Instrument/MMS/1/FIELDS/DSP
spase://SMWG/Instrument/MMS/1/FIELDS/SDP
spase://SMWG/Instrument/MMS/1/FIELDS/SCM
spase://SMWG/Instrument/MMS/1/FIELDS/FGM
spase://SMWG/Instrument/MMS/2/FIELDS/ADP
spase://SMWG/Instrument/MMS/2/FIELDS/DSP
spase://SMWG/Instrument/MMS/2/FIELDS/SDP
spase://SMWG/Instrument/MMS/2/FIELDS/SCM
spase://SMWG/Instrument/MMS/2/FIELDS/FGM
spase://SMWG/Instrument/MMS/3/FIELDS/ADP
spase://SMWG/Instrument/MMS/3/FIELDS/DSP
spase://SMWG/Instrument/MMS/3/FIELDS/SDP
spase://SMWG/Instrument/MMS/3/FIELDS/SCM
spase://SMWG/Instrument/MMS/3/FIELDS/FGM
spase://SMWG/Instrument/MMS/4/FIELDS/ADP
spase://SMWG/Instrument/MMS/4/FIELDS/DSP
spase://SMWG/Instrument/MMS/4/FIELDS/SDP
spase://SMWG/Instrument/MMS/4/FIELDS/SCM
spase://SMWG/Instrument/MMS/4/FIELDS/FGM
MeasurementType
MagneticField
MeasurementType
Waves.Passive
MeasurementType
Spectrum
TemporalDescription
TimeSpan
StartDate
2015-03-17 00:00:00.000Z
RelativeStopDate
-P2D
SpectralRange
RadioFrequency
DisplayCadence
PT120M
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Earth.Magnetosphere.Main
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.NearSurface.EquatorialRegion
ObservedRegion
Earth.NearSurface.Plasmasphere
ObservedRegion
Heliosphere.NearEarth
Caveats
Users should use QuickLook data plots for event browsing, and not for scientific analysis or publication without express consent of the PI and relevant Lead Co-Investigators.
Keywords
Dynamic Spectrogram
Spectrogram
Parameter #1
Name
Power Spectral Density
Description
Spectrograms for each of the 4 MMS spacecraft. Displayed frequency is in units of Hz.
Units
nT^2*Hz^-1
Wave
WaveType
PlasmaWaves
WaveQuantity
ACMagneticField
FrequencyRange
SpectralRange
RadioFrequency
Low
0.0
High
6
Units
kHz