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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
ACE Definitive Orbit, Daily Values, in GSE and J2000 GCI Coordinates
var authors='ACE flight operations team (FOT), and R. Candey';
document.write(authors);
(2022).
ACE Definitive Orbit, Daily Values, in GSE and J2000 GCI Coordinates.
[Data set].
Space Physics Data Facility.
https://doi.org/10.48322/mh1w-x115. Accessed on document.write(currentDateStr);.
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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/NumericalData/ACE/Ephemeris/Definitive/P1D
Description
ACE Definitive Orbit, in Geocentric Solar Ecliptic, GSE, and J2000 Geocentric Ecliptic, GCI, Coordinates. Data in GCI and RTN Coordinates are received Daily by the ACE Science Center, ASC, from the ACE Flight Dynamics Facility, FDF, at GSFC. ASC transforms the Data into the other Coordinate Systems. The Data are reported for the Beginning and End of each DSN Telemetry Pass, and also for the Beginning and End of each Spacecraft Maneuver during a DSN Pass. Because the Attitude and Orbit of the ACE Spacecraft change relatively slowly, the FDF does not provide the Data on finer Time Scales.
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/ACE/Ephemeris/Definitive/P1D
NamingAuthority
NASA
ResourceType
NumericalData
ResourceHeader
ResourceName
ACE Definitive Orbit, Daily Values, in GSE and J2000 GCI Coordinates
DOI
https://doi.org/10.48322/mh1w-x115
ReleaseDate
2026-06-26 13:14:15Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 15:38:11Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2022-08-19 12:34:56.789Z
Note
Added DOI and PublicationInfo minted by JMW on 20220808, updated one InformationURL URL, updated the RepositoryID, updated the SPDF MetadataContact Person to Robert M. Candey, metadata updated to SPASE 2.4.1, reviewed by LFB 20220819
RevisionEvent
ReleaseDate
2025-09-30 14:27:17Z
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 13:28:23Z
Note
Added MetadataRightsList and RightsList(s). Updated to 2.7.1. ZCB
RevisionEvent
ReleaseDate
2026-06-26 13:14:15Z
Note
Add 'Z' to RevisionEvent:ReleaseDate(s), PublicationDate, TemporalDescription:TimeSpan:StartDate. ZCB
Description
ACE Definitive Orbit, in Geocentric Solar Ecliptic, GSE, and J2000 Geocentric Ecliptic, GCI, Coordinates. Data in GCI and RTN Coordinates are received Daily by the ACE Science Center, ASC, from the ACE Flight Dynamics Facility, FDF, at GSFC. ASC transforms the Data into the other Coordinate Systems. The Data are reported for the Beginning and End of each DSN Telemetry Pass, and also for the Beginning and End of each Spacecraft Maneuver during a DSN Pass. Because the Attitude and Orbit of the ACE Spacecraft change relatively slowly, the FDF does not provide the Data on finer Time Scales.
Acknowledgement
E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html.
PublicationInfo
Authors
ACE flight operations team (FOT), and R. Candey
PublicationDate
2022-01-01 00:00:00Z
PublishedBy
Space Physics Data Facility
Contacts
Role
Person
StartDate
StopDate
Note
1.
PrincipalInvestigator
spase://SMWG/Person/Edward.C.Stone.Jr
2.
MetadataContact
spase://SMWG/Person/Robert.M.Candey
3.
MetadataContact
spase://SMWG/Person/Lee.Frost.Bargatze
4.
MetadataContact
spase://SMWG/Person/James.M.Weygand
InformationURL
Name
ACE Attitude and Orbit Data Website
URL
https://izw1.caltech.edu/ACE/ASC/orbit.html
Description
ACE Attitude and Orbit Data Release Notes and Information
InformationURL
Name
Satellite Situation Center, SSCWeb, System and Services
URL
https://sscweb.gsfc.nasa.gov
Description
The Satellite Situation Center Web, SSCWeb, Service has been developed and is operated jointly by the NASA/GSFC Space Physics Data Facility, SPDF, and the National Space Science Data Center, NSSDC, to support a Range of NASA Science Programs and to fulfill Key International NASA Responsibilities including those of NSSDC and the World Data Center-A for Rockets and Satellites. The Software and associated Database of SSCWeb together form a System to cast Geocentric Spacecraft Location Information into a Framework of Empirical Geophysical Regions and Mappings of Spacecraft Locations along Lines of the Earth's Magnetic Field. This Capability is one Key to Mission Science Planning, both Single Missions and Coordinated Observations of Multiple Spacecraft with Ground-Based Investigations, and to subsequent Multi-Mission Data Analysis.
PriorIDs
spase://VSPO/NumericalData/ACE/Ephemeris/Definitive/P1D
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/ace/orbit/level_2_cdaweb/def_or/
Description
Access to Data in CDF Format via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/ace/orbit/level_2_cdaweb/def_or/
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=AC_OR_DEF&index=sp_phys
ProductKey
AC_OR_DEF
Description
Access to ASCII, CDF, and plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
AccessDirectoryTemplate
https://cdaweb.gsfc.nasa.gov/pub/data/ace/orbit/level_2_cdaweb/def_or/$Y
AccessFilenameTemplate
ac_or_def_$Y$m$d_$v.cdf
Acknowledgement
E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html. 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/AC_OR_DEF/clientLibraryExample/
Style
WebService
ProductKey
AC_OR_DEF
Description
Access to this data from common programming environments. Note: this AccessInformation element was added by HDPWS.
Format
Binary
Acknowledgement
E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html. 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
AC_OR_DEF
Description
Web Service to this product using the HAPI interface.
Format
CSV
Acknowledgement
E.C. Stone, Please acknowledge the Principal Investigator, E. C. Stone, California Institute of Technology, Pasadena, USA. See the Rules of Use available from the ACE Science Center at: http://www.srl.caltech.edu/ACE/ASC/level2/policy_lvl2.html. Please acknowledge the data providers and CDAWeb when using these data.
ProcessingLevel
Calibrated
InstrumentIDs
spase://SMWG/Instrument/ACE/Ephemeris
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
1997-08-26 00:00:00.000Z
RelativeStopDate
-P1D
Cadence
P1D
ObservedRegion
Heliosphere
ObservedRegion
Heliosphere.NearEarth
ObservedRegion
Heliosphere.Inner
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description
Time, Beginning of Interval
Caveats
Average Type: standard This parameter exhibits an increasing monotonic progression.
Cadence
P1D
Units
ms
UnitsConversion
1e-3>s
RenderingHints
AxisLabel
Epoch
ValueFormat
E14.8
ScaleMin
6.2987652219904e+13
ScaleMax
6.3745034619904e+13
ScaleType
LinearScale
ValidMin
01-Jan-1996 00:00:00.000
ValidMax
01-Jan-2020 00:00:00.000
FillValue
-1.0e+31
Support
SupportQuantity
Temporal
Parameter #2
Name
Spacecraft Position, GSE
Set
Time series defined by using: EPOCH
ParameterKey
GSE_POS
Description
ACE Spacecraft Position, GSE Cartesian Coordinates
Caveats
ACE Spacecraft Position, three Components in GSE Coordinates Average Type: standard
Cadence
P1D
Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
RenderingHints
DisplayType
TimeSeries
ValueFormat
F10.1
Structure
Size
3
Element
Name
X_GSE
Index
1
ValidMin
-3.0e+06
ValidMax
3.0e+06
RenderingHints
ScaleMin
-3.0e+06
ScaleMax
3.0e+06
Element
Name
Y_GSE
Index
2
ValidMin
-2.0e+06
ValidMax
2.0e+06
RenderingHints
ScaleMin
-2.0e+06
ScaleMax
2.0e+06
Element
Name
Z_GSE
Index
3
ValidMin
-2.0e+06
ValidMax
2.0e+06
RenderingHints
ScaleMin
-2.0e+06
ScaleMax
2.0e+06
FillValue
-1.0e+31
Support
Qualifier
Vector
SupportQuantity
Positional
Parameter #3
Name
Spacecraft Position, J2000 GCI
Set
Time series defined by using: EPOCH
ParameterKey
GCI_POS
Description
ACE Spacecraft Position, J2000 GCI Cartesian Coordinates
Caveats
ACE Spacecraft Position, three Components in J2000 GCI Coordinates Average Type: standard
Cadence
P1D
Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
RenderingHints
DisplayType
TimeSeries
ValueFormat
F10.1
Structure
Size
3
Element
Name
X_GCI
Index
1
ValidMin
-3.0e+06
ValidMax
3.0e+06
RenderingHints
ScaleMin
-3.0e+06
ScaleMax
3.0e+06
Element
Name
Y_GCI
Index
2
ValidMin
-2.0e+06
ValidMax
2.0e+06
RenderingHints
ScaleMin
-2.0e+06
ScaleMax
2.0e+06
Element
Name
Z_GCI
Index
3
ValidMin
-2.0e+06
ValidMax
2.0e+06
RenderingHints
ScaleMin
-2.0e+06
ScaleMax
2.0e+06
FillValue
-1.0e+31
Support
Qualifier
Vector
SupportQuantity
Positional