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Data Access
FTPS from SPDF (not with most browsers)
HTTPS from SPDF
CDAWeb
WebService:
CDAWeb Programmatic Data Access
HAPI: CDAWeb HAPI Server
STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Fluxgate Magnetometer (MAG) Magnetic Field Vectors, in Radial-Tangential-Normal (RTN) Coordinates, Level Beacon (LB), PT0.125S Data
var authors='Luhmann, Janet, G.';
document.write(authors);
(2023).
STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Fluxgate Magnetometer (MAG) Magnetic Field Vectors, in Radial-Tangential-Normal (RTN) Coordinates, Level Beacon (LB), PT0.125S Data.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/trbb-ff59. Accessed on document.write(currentDateStr);.
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ResourceID
spase://NASA/NumericalData/STEREO-A/IMPACT/MAG/RTN/LevelBeacon/PT0.125S
Description
STEREO Ahead reprocessed IMPACT/MAG Beacon magnetic field vector component and vector magnitude data expressed in Heliographic, HG, Radial-Tangential-Normal, RTN, Cartesian coordinates around the 2015 solar conjunction. * Version 1: Used internally at UCB and UCLA ONLY, No corrections applied to raw MAG data * Version 2: Offset correction applied to MAG data * Version 3: Initial algorithm for correcting glitches for the X sensor on STEREO Ahead applied * Version 4: Improvement in glitch correction algorithm applied * Version 5: Further refinement of the glitch correction for the X sensor on STEREO Ahead, Also, two timing issues resolved: - a) applying a 6 ms time shift to account for time lag between IMPACT IDPU and MAG - b) fixing an occasional 1 s 'glitch' * Version 6: Added FILTER_VALUE variable
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/STEREO-A/IMPACT/MAG/RTN/LevelBeacon/PT0.125S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
STEREO-A In-Situ Measurements of Particles and CME Transients (IMPACT) Fluxgate Magnetometer (MAG) Magnetic Field Vectors, in Radial-Tangential-Normal (RTN) Coordinates, Level Beacon (LB), PT0.125S Data
DOI
https://doi.org/10.48322/trbb-ff59
ReleaseDate
2026-07-21 12:07:20Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
RevisionEvent
ReleaseDate
2025-10-03 10:49:11Z
Note
Updated PublishedBy name to match ROR Registry. 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 13:31:32Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:28:11Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate, TemporalDescription:TimeSpan:StopDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:07:20Z
Note
Added HelioData InformationURL. JWL
Description
STEREO Ahead reprocessed IMPACT/MAG Beacon magnetic field vector component and vector magnitude data expressed in Heliographic, HG, Radial-Tangential-Normal, RTN, Cartesian coordinates around the 2015 solar conjunction. * Version 1: Used internally at UCB and UCLA ONLY, No corrections applied to raw MAG data * Version 2: Offset correction applied to MAG data * Version 3: Initial algorithm for correcting glitches for the X sensor on STEREO Ahead applied * Version 4: Improvement in glitch correction algorithm applied * Version 5: Further refinement of the glitch correction for the X sensor on STEREO Ahead, Also, two timing issues resolved: - a) applying a 6 ms time shift to account for time lag between IMPACT IDPU and MAG - b) fixing an occasional 1 s 'glitch' * Version 6: Added FILTER_VALUE variable
Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann for use of the Data
PublicationInfo
Authors
Luhmann, Janet, G.
PublicationDate
2023-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Janet.G.Luhmann
2.
MetadataContact
spase://SMWG/Person/Robert.M.Candey
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
STEREO IMPACT Experiment web site, UCB
URL
http://sprg.ssl.berkeley.edu/impact/
Description
STEREO, In-situ Measurements of Particles and CME Transients, IMPACT, experiment and data descriptions, web site hosted by UC Berkeley
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/STEREO-A_IMPACT_MAG_RTN_LevelBeacon_PT0.125S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VSPO/NumericalData/STEREO-A/IMPACT/MAG/RTN/LevelBeacon/PT0.125S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/stereo/ahead/beacon_mag/
Description
Access to Data in CDF Format via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/stereo/ahead/beacon_mag/
Description
Access to Data in CDF Format via http from SPDF
AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=STA_LB_MAG_RTN&index=sp_phys
ProductKey
STA_LB_MAG_RTN
Description
Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/stereo/ahead/beacon_mag/$Y
AccessFilenameTemplate
sta_lb_mag_rtn_$Y$m$d_$v.cdf
Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb Programmatic Data Access
URL
https://cdaweb.gsfc.nasa.gov/WS/cdasr/1/dataviews/sp_phys/datasets/STA_LB_MAG_RTN/clientLibraryExample/
Style
WebService
ProductKey
STA_LB_MAG_RTN
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann. Please acknowledge the Data Providers and CDAWeb when using these Data.
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
RightsList
Rights
SchemeURI
https://spdx.org/licenses/
RightsIdentifierScheme
SPDX
RightsIdentifier
CC0-1.0
RightsURI
https://spdx.org/licenses/CC0-1.0.html
RightsName
Creative Commons Zero v1.0 Universal
Note
CC0 1.0 Universal is the Creative Commons license applicable to all publicly available NASA Heliophysics data products
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
STA_LB_MAG_RTN
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
Please acknowledge the Principal Investigator J.G. Luhmann. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/STEREO-A/IMPACT/MAG
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
2014-08-01 00:00:00.000Z
StopDate
2015-11-30 23:59:59.999Z
Cadence
PT0.125S
ObservedRegion
Heliosphere.Remote1AU
Parameter #1
Name
Epoch Time, since 0 A.D.
ParameterKey
Epoch
Description
Epoch Time, Milliseconds since 0 A.D.
Caveats
Interval-centered time tag
Cadence
PT0.125S
Units
ms
UnitsConversion
1e-3>s
RenderingHints
AxisLabel
Epoch
ValidMin
01-Jan-1990 00:00:00.000
ValidMax
31-Dec-2020 00:00:00.000
FillValue
31-Dec-9999 23:59:59.999
Support
SupportQuantity
Temporal
Parameter #2
Name
IMPACT/MAG Magnetic Field Vector in Heliographic, RTN
Set
Time series defined by using: EPOCH
ParameterKey
BFIELD
Description
IMPACT/MAG Magnetic Field Vector and Vector Magnitude in Heliographic, HG, Radial-Tangential-Normal, RTN, Coordinates
Cadence
PT0.125S
Units
nT
UnitsConversion
1e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
RenderingHints
DisplayType
TimeSeries
ValueFormat
E13.6
ScaleType
LinearScale
Structure
Size
4
Element
Name
BR
Index
1
RenderingHints
AxisLabel
BR
Element
Name
BT
Index
2
RenderingHints
AxisLabel
BT
Element
Name
BN
Index
3
RenderingHints
AxisLabel
BN
Element
Name
BTotal
Index
4
RenderingHints
AxisLabel
BTotal
ValidMin
-10000.0
ValidMax
1.0e+06
FillValue
-1.0e+31
Field
Qualifier
Vector
FieldQuantity
Magnetic
Parameter #3
Name
Flag Values, IMPACT/MAG Magnetic Field Vector in Heliographic, RTN
Set
Time series defined by using: EPOCH
ParameterKey
MAGFLAGUC
Description
Bitwise stored Flag Values, IMPACT/MAG Magnetic Field Vector and Vector Magnitude in Heliographic, HG, Radial-Tangential-Normal, RTN, Coordinates
Caveats
* bit 0:3 Mag error counter * bit 4:7 Mag command counter * bit 8 Spare * bit 9 First * bit 10 Time * bit 11 Interface parity error: 0=OK, 1=Fault * bit 12 Interface timeout error: 0=OK, 1=Fault * bit 13 ADC calibration: 0=OFF, 1=ON * bit 14 In flight calibration: 0=OFF, 1=ON * bit 15 Range: 0=Low fields, High sensitivity, 1=High fields, Low sensitivity * bit 16 Calibration: 0=Old cal, 1=New cal * bit 17 6 ms added to sync correctly with IDPU * bit 18 62.5 ms to 8 hz data, no longer used * bit 19 Timestamp resync: that is, the time stamp has been changed, i.e. the 1 s glitch * bit 20 Data rate resync: timestamps were calculated with a different Δt for mixed frequency data or the data rate was not synced properly so the records timestamps were calculated incorrectly * bit 21 Derived from 32 hz MAG data
Cadence
PT0.125S
RenderingHints
AxisLabel
MAGFLAGUC
ValueFormat
I8
ScaleType
LinearScale
ValidMin
0
ValidMax
4294967295
FillValue
4294967295
Support
SupportQuantity
Other
Parameter #4
Name
Filter Value, Upper Limit for Valid Magnetic Field Magnitude
ParameterKey
FILTER_VALUE
Description
Filter Value corresponds to the Upper Limit for the expected Valid Range of Total Magnetic Field Values, when the Field is greater than the Filter Value, the Data is replaced with Fill Values as such Data are likely Spurious and Non-Physical
Cadence
PT0.125S
Units
nT
UnitsConversion
1e-9>T
RenderingHints
AxisLabel
filter
ValueFormat
E12.2
ScaleType
LinearScale
ValidMin
0.0
ValidMax
100000.0
FillValue
-1.0e+31
Support
Qualifier
Maximum
SupportQuantity
Other