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Data Access

Geotail Spacecraft Definitive Positions

ResourceID
spase://JAXA/NumericalData/Geotail/Ephemeris/PT10M

Description

Definitive Geotail spacecraft positions in various coordinate systems

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Details

Version:2.7.2

NumericalData

ResourceID
spase://JAXA/NumericalData/Geotail/Ephemeris/PT10M
NamingAuthority
JAXA
ResourceType
NumericalData
ResourceHeader
ResourceName
Geotail Spacecraft Definitive Positions
ReleaseDate
2026-11-04 16:08:37Z
RevisionHistory
RevisionEvent
ReleaseDate
2021-04-27 17:52:35Z
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2026-11-04 16:08:37Z
Note
Added HelioCloud S3 AccessURL. Added ResourceType and NamingAuthority. Changed http to https in top-level schemaLocation attribute. Fixed version number separator in top-level schemaLocation attribute. Updated to 2.7.2. Add 'Z' to TemporalDescription:TimeSpan:StartDate. ZCB
Description

Definitive Geotail spacecraft positions in various coordinate systems

Contacts
RolePersonStartDateStopDateNote
1.DataProducerspase://SMWG/Person/Gerald.Blackwell
2.MetadataContactspase://SMWG/Person/Jan.Merka
PriorIDs
spase://VMO/NumericalData/Geotail/Ephemeris/PT10M
spase://VSPO/NumericalData/Geotail/Ephemeris/PT10M
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF/CDAWeb
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
ftps://spdf.gsfc.nasa.gov/pub/data/geotail/orbit/def_or/
Description

NASA/GSFC CDAWeb ftp access to the data.

AccessURL
Name
HTTPS from SPDF
URL
https://spdf.gsfc.nasa.gov/pub/data/geotail/orbit/def_or/
Description

In CDF via HTTP from SPDF

AccessURL
Name
CDAWeb
URL
https://cdaweb.gsfc.nasa.gov/cgi-bin/eval2.cgi?dataset=GE_OR_DEF&index=sp_phys
ProductKey
GE_OR_DEF
AccessURL
Name
SSCWeb
URL
https://sscweb.gsfc.nasa.gov/cgi-bin/Locator.cgi
ProductKey
geotail
Format
CDF
Encoding
None
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
CDAWeb HAPI Server
URL
https://cdaweb.gsfc.nasa.gov/hapi
Style
HAPI
ProductKey
GE_OR_DEF
Description

Web Service to this product using the HAPI interface.

Format
CSV
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
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
HelioCloud Catalog Endpoint
URL
https://api.heliocloud.org/cloudcatalog?id=GE_OR_DEF
Style
Overview
ProductKey
GE_OR_DEF
Description

Endpoint to access the data from HelioCloud. Data is split into one CSV file per year.

Format
CSV
Encoding
S3_BUCKET
InstrumentIDs
spase://SMWG/Instrument/Geotail/Ephemeris
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
1992-07-27 16:00:00Z
RelativeStopDate
-P7D
Cadence
PT10M
Parameter #1
Name
Orbit Epoch Time
ParameterKey
Epoch
Description

Number of milliseconds since the CDF epoch

Units
ms
UnitsConversion
1e-3>s
ValidMin
01-Jul-1992 00:00:00.000
ValidMax
31-Dec-2020 23:59:59.000
FillValue
-1.0E31
Support
SupportQuantity
Temporal
Parameter #2
Name
Orbit PB5 Time
ParameterKey
Time_PB5
Structure
Size
3
Element
Name
Year
Qualifier
Component.I
Index
1
Units
year
ValidMin
1992
ValidMax
2020
FillValue
-2147483648
Element
Name
Day of Year (Jan 1 = day 1)
Qualifier
Component.I
Index
2
Units
day
ValidMin
1
ValidMax
366
FillValue
-2147483648
Element
Name
Elapsed ms of day
Qualifier
Component.I
Index
3
Units
ms
UnitsConversion
1e-3>s
ValidMin
0
ValidMax
86399000
FillValue
-2147483648
Support
SupportQuantity
Temporal
Parameter #3
Name
GCI Cartesian Position
ParameterKey
GCI_POS
Description

Spacecraft position vector in GCI coordinates

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
Structure
Size
3
Element
Name
X GCI
Qualifier
Component.I
Index
1
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Y GCI
Qualifier
Component.J
Index
2
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Z GCI
Qualifier
Component.K
Index
3
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #4
Name
GCI Cartesian Velocity
ParameterKey
GCI_VEL
Description

Spacecraft orbital velocity vector in GCI coordinates

Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
Structure
Size
3
Element
Name
vx GCI
Qualifier
Component.I
Index
1
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vy GCI
Qualifier
Component.J
Index
2
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vz GCI
Qualifier
Component.K
Index
3
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Support
SupportQuantity
Velocity
Parameter #5
Name
GSE Cartesian Position
ParameterKey
GSE_POS
Description

Spacecraft position vector in GSE coordinates

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
X GSE
Qualifier
Component.I
Index
1
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Y GSE
Qualifier
Component.J
Index
2
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Z GSE
Qualifier
Component.K
Index
3
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #6
Name
GSE Cartesian Velocity
ParameterKey
GSE_VEL
Description

Spacecraft orbital velocity vector in GSE coordinates

Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
vx GSE
Qualifier
Component.I
Index
1
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vy GSE
Qualifier
Component.J
Index
2
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vz GSE
Qualifier
Component.K
Index
3
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Support
SupportQuantity
Velocity
Parameter #7
Name
GSM Cartesian Position
ParameterKey
GSM_POS
Description

Spacecraft position vector in GSM coordinates

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Structure
Size
3
Element
Name
X GSM
Qualifier
Component.I
Index
1
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Y GSM
Qualifier
Component.J
Index
2
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Z GSM
Qualifier
Component.K
Index
3
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #8
Name
GSM Cartesian Velocity
ParameterKey
GSM_VEL
Description

Spacecraft orbital velocity vector in GSM coordinates

Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Structure
Size
3
Element
Name
vx GSM
Qualifier
Component.I
Index
1
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vy GSM
Qualifier
Component.J
Index
2
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vz GSM
Qualifier
Component.K
Index
3
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Support
SupportQuantity
Velocity
Parameter #9
Name
GCI Sun Postion Vector
ParameterKey
SUN_VECTOR
Description

Sun position vector in GCI coordinates

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
Structure
Size
3
Element
Name
Sun X GCI
Qualifier
Component.I
Index
1
ValidMin
-1.6E8
ValidMax
1.6E8
FillValue
-1.0E31
Element
Name
Sun Y GCI
Qualifier
Component.J
Index
2
ValidMin
-1.6E8
ValidMax
1.6E8
FillValue
-1.0E31
Element
Name
Sun Z GCI
Qualifier
Component.K
Index
3
ValidMin
-1.6E8
ValidMax
1.6E8
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #10
Name
HEC Cartesian Position
ParameterKey
HEC_POS
Description

Spacecraft position vector in HEC coordinates

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HEE
Structure
Size
3
Element
Name
X HEC
Qualifier
Component.I
Index
1
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Y HEC
Qualifier
Component.J
Index
2
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Element
Name
Z HEC
Qualifier
Component.K
Index
3
ValidMin
-1800000.0
ValidMax
1800000.0
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #11
Name
HEC Cartesian Velocity
ParameterKey
HEC_VEL
Description

Spacecraft orbital velocity vector in HEC coordinates

Units
km/s
UnitsConversion
1e3>m/s
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
HEE
Structure
Size
3
Element
Name
vx HEC
Qualifier
Component.I
Index
1
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vy HEC
Qualifier
Component.J
Index
2
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Element
Name
vz HEC
Qualifier
Component.K
Index
3
ValidMin
-12.0
ValidMax
12.0
FillValue
-1.0E31
Support
SupportQuantity
Velocity
Parameter #12
Name
Carrington Rotation Number
ParameterKey
CRN_EARTH
Description

Carrington rotation number of the Earth

ValidMin
1857
ValidMax
2239
FillValue
-2147483648
Support
SupportQuantity
Positional
Parameter #13
Name
Heliographic Long of the Earth
ParameterKey
LONG_EARTH
Description

Heliographic longitude of the Earth

Units
rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HG
ValidMin
0.0
ValidMax
6.283185307
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #14
Name
Heliographic Lat of the Earth
ParameterKey
LAT_EARTH
Description

Heliographic latitude of the Earth

Units
rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HG
ValidMin
-1.570796327
ValidMax
1.570796327
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #15
Name
Heliographic Long of Craft
ParameterKey
LONG_SPACE
Description

Heliographic longitude of the spacecraft

Units
rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HG
ValidMin
0.0
ValidMax
6.283185307
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #16
Name
Heliographic Lat of the Craft
ParameterKey
LAT_SPACE
Description

Heliographic latitude of the spacecraft

Units
rad
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
HG
ValidMin
-1.570796327
ValidMax
1.570796327
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional