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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
Download of STEREO-B IMPACT/MAG Level 1 data
STEREO-B In-situ Measurements of Particles And CME Transients (IMPACT) Magnetic Field Vectors and Ancillary Data
var authors='Schroeder, Peter; Luhmann, Janet, G.';
document.write(authors);
(2023).
STEREO-B In-situ Measurements of Particles And CME Transients (IMPACT) Magnetic Field Vectors and Ancillary Data.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/y8qa-7k94. Accessed on document.write(currentDateStr);.
Note: Proper references, including
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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/STEREO-B/IMPACT/MAG/L1/PT0.125S
Description
This data product contains Level 1 0.125-s values of solar wind magnetic field data taken by the IMPACT/Magnetometer on STEREO-B. The interface at UCB provides access to CDF-formatted files of magnetic field data in RTN coordinates. The interface at UCLA allows selection of STEREO A or STEREO B data and of vector quantities in RTN or spacecraft coordinates. It also allows selection of either of two parameter sets: [Bx, By, Bz, B ] or [RBx, RBy, RBz, B , cone and clock angles]. Further, this interface enables easy migration between plot vs. ASCII data presentation options and among the three available resolutions (1, 8, 32 Hz). The parameter level information given below is specific to the CDF version of the data at UCB.
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-B/IMPACT/MAG/L1/PT0.125S
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
STEREO-B In-situ Measurements of Particles And CME Transients (IMPACT) Magnetic Field Vectors and Ancillary Data
AlternateName
STEREO-B IMPACT/MAG Level 1 Data
DOI
https://doi.org/10.48322/y8qa-7k94
ReleaseDate
2026-07-21 12:07:27Z
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 10:49:14Z
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 13:31:37Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:28:28Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate. ZCB
RevisionEvent
ReleaseDate
2026-07-21 12:07:27Z
Note
Added HelioData InformationURL. JWL
Description
This data product contains Level 1 0.125-s values of solar wind magnetic field data taken by the IMPACT/Magnetometer on STEREO-B. The interface at UCB provides access to CDF-formatted files of magnetic field data in RTN coordinates. The interface at UCLA allows selection of STEREO A or STEREO B data and of vector quantities in RTN or spacecraft coordinates. It also allows selection of either of two parameter sets: [Bx, By, Bz, B ] or [RBx, RBy, RBz, B , cone and clock angles]. Further, this interface enables easy migration between plot vs. ASCII data presentation options and among the three available resolutions (1, 8, 32 Hz). The parameter level information given below is specific to the CDF version of the data at UCB.
Acknowledgement
The STEREO IMPACT/MAG Team
PublicationInfo
Authors
Schroeder, Peter; Luhmann, Janet, G.
PublicationDate
2023-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
DataProducer
spase://SMWG/Person/Peter.Schroeder
2.
PrincipalInvestigator
spase://SMWG/Person/Janet.G.Luhmann
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
InformationURL
Name
STEREO IMPACT Mission Site
URL
http://sprg.ssl.berkeley.edu/impact/
Description
The web site provides detailed descriptions of the STEREO IMPACT MAG instrument as well as associated data sets.
InformationURL
Name
HelioData
URL
https://helio.data.nasa.gov/dataset/STEREO-B_IMPACT_MAG_L1_PT0.125S
Description
The HelioData dataset page provides an overview of the dataset with access links, associated variables, and more.
PriorIDs
spase://VHO/NumericalData/STEREO-B/IMPACT/MAG/L1_PT0.125S
spase://VSPO/NumericalData/STEREO-B/IMPACT/MAG/PT1S
spase://VSPO/NumericalData/STEREO-B/IMPACT/MAG/L1/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/behind/l1/impact/rtn/mag/
Description
FTP repository of Level1 magnetic field vectors form the IMPACT/MAG instrument in CDF format at CDAWeb
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/stereo/behind/l1/impact/rtn/mag/
Description
In CDF via HTTP from SPDF
Format
CDF
Acknowledgement
Please acknowledge the Principal Investigator Janet Luhmann and the CDAWeb team at GSFC/SPDF.
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
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=STB_L1_MAG_RTN&index=sp_phys
ProductKey
STB_L1_MAG_RTN
Description
Level 1 magnetic field vectors data from the IMPACT/MAG instrument on the STEREO Behind spacecraft with subset, plot, list from CDAWeb
Format
Text
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/stereo/behind/l1/impact/rtn/mag/$Y
AccessFilenameTemplate
stb_l1_mag_rtn_$Y$m$d_$v.cdf
Acknowledgement
Please acknowledge the Principal Investigator Janet Luhmann and the CDAWeb team at GSFC/SPDF.
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/STB_L1_MAG_RTN/clientLibraryExample/
Style
WebService
ProductKey
STB_L1_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 Janet Luhmann and the CDAWeb team at GSFC/SPDF.
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
STB_L1_MAG_RTN
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
Please acknowledge the Principal Investigator Janet Luhmann and the CDAWeb team at GSFC/SPDF.
AccessInformation
RepositoryID
spase://SMWG/Repository/STEREO/IMPACT
Availability
Online
AccessRights
Open
AccessURL
Name
Download of STEREO-B IMPACT/MAG Level 1 data
URL
http://stereo.ssl.berkeley.edu/l1data/behind/mag/RTN/
Description
A web site hosting the STEREO-B IMPACT/MAG Level 1 data
Format
CDF
Encoding
None
ProviderResourceName
STEREO-B IMPACT/MAG Level 1 Data
ProviderProcessingLevel
1
ProviderVersion
3
InstrumentIDs
spase://SMWG/Instrument/STEREO-B/IMPACT/MAG
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
2006-11-08 00:00:00Z
RelativeStopDate
-P01M
Cadence
PT0.125S
ObservedRegion
Heliosphere.Remote1AU
Caveats
Current version of the data include very fast (subsecond) glitches in the magnetometer's X sensor. Magnitude of these glitches are approximately 0.5 nT and occur at varying frequencies throughout the mission.
Parameter #1
Name
Time
ParameterKey
Epoch
Description
Number of milliseconds since 0 AD
Caveats
Interval-centered time tag
Units
ms
UnitsConversion
1.0e-3>s
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
Magnetic Field Vector in RTN Coordinates
ParameterKey
BFIELD
Description
Magnetic field vectors as measured by the IMPACT/MAG instrument in RTN coordinate system.
Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
RTN
Structure
Size
4
Element
Name
Bx
Qualifier
Component.I
Index
1
ValidMin
-Infinity
ValidMax
Infinity
FillValue
-1.0E31
Element
Name
By
Qualifier
Component.J
Index
2
ValidMin
-Infinity
ValidMax
Infinity
FillValue
-1.0E31
Element
Name
Bz
Qualifier
Component.K
Index
3
ValidMin
-Infinity
ValidMax
Infinity
FillValue
-1.0E31
Element
Name
B Magnitude
Index
4
ValidMin
-Infinity
ValidMax
Infinity
FillValue
-1.0E31
Field
Qualifier
Vector
FieldQuantity
Magnetic
Parameter #3
Name
MAG Flag
Description
Error Flag - 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 Cal (0=OFF, 1=ON) bit 14 In Flight Cal (0=OFF, 1=ON) bit 15 Range (0=low fields, high sensitivity, 1=high fields, low sen bit 16 Calibration (0=old cal, 1=new cal) bit 17 STEREO STEPPING For X-axis bit 18:31 spare
ValidMin
0
ValidMax
4294967295
Support
SupportQuantity
Other