Version:2.6.0
NumericalData
ResourceID
spase://NASA/NumericalData/TWINS2/Ephemeris/Attitude/Definitive/PT0.512S
ResourceHeader
ResourceName
TWINS-2 Ephemeris, Definitive Spacecraft Attitude, PT0.512S Data
DOI
https://doi.org/10.48322/btg2-gm95
ReleaseDate
2023-07-30 12:34:56.789
RevisionHistory
RevisionEvent
ReleaseDate
2021-03-29 17:14:50
Note
Only known prior ReleaseDate of the metadata
RevisionEvent
ReleaseDate
2023-07-30 12:34:56.789
Note
Added DOI and PublicationInfo minted by LFB, metadata versioned up to SPASE 2.6.0, reviewed by LFB 20230727
Description
Two Wide-angle Imaging Neutral-atom Spectrometers 2, TWINS 2, Spacecraft Attitude data, Earth Centered Inertial, ECI, coordinates. This TWINS data set contains spacecraft attitude data as polar and azimuthal instrument pointing vectors. The polar vector points along the TWINS rotation axis. The azimuthal vector lies in the plane normal to the polar vector and points toward the central scanning position, which is defined as the zero-point location. Such pointing is derived from both the spacecraft attitude history, SAH, file and the sensor mounting orientation. The computation employed is designed to achieve a pointing accuracy of 0.5°. Any deviation from this accuracy level is indicated in the header record metadata.
Acknowledgement
Please acknowledge the Principal Investigator D.J. McComas for use of the Data
PublicationInfo
Authors
McComas, David, J.
PublicationDate
2023-01-01 00:00:00
PublishedBy
NASA Space Physics Data Facility
Contacts
InformationURL
Name
NSSDC Master Catalog, TWINS 2 spacecraft
URL
Description
General information concerning the TWINS 2 spacecraft
Language
en
PriorIDs
spase://VSPO/NumericalData/TWINS2/Attitude
spase://VSPO/NumericalData/TWINS2/ENA/TWINS2_AT_DEF_Data
spase://VSPO/NumericalData/TWINS2/Ephemeris/Attitude/Definitive/PT0.512S
AccessInformation
RepositoryID
Availability
Online
AccessRights
Open
AccessURL
Name
FTPS from SPDF (not with most browsers)
URL
Description
Access to Data in CDF Format via ftp from SPDF
AccessURL
Name
HTTPS from SPDF
URL
Description
Access to Data in CDF Format via http from SPDF
AccessURL
Name
CDAWeb
URL
ProductKey
TWINS2_AT_DEF
Description
Access to ASCII, CDF, and Plots via NASA/GSFC CDAWeb
Format
CDF
Encoding
None
Acknowledgement
Please acknowledge the Principal Investigator D.J. McComas. Please acknowledge the Data Providers and CDAWeb when using these Data.
ProcessingLevel
Calibrated
InstrumentIDs
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
2008-04-14 00:53:59.000
StopDate
2016-10-27 23:59:59.000
Cadence
PT0.512S
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Earth.Magnetosphere.Main
ObservedRegion
Earth.Magnetosphere.RadiationBelt
ObservedRegion
Earth.Magnetosheath
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description
Cadence
PT0.512S
RenderingHints
DisplayType
TimeSeries
AxisLabel
Epoch
FillValue
31-Dec-9999 23:59:59.999
Support
Parameter #2
Name
Start Time, MJD
Set
Time series defined by using: EPOCH
ParameterKey
ISTARTTIMEMJD
Description
Start Time, Mission Julian Date, MJD, time key of data point
Cadence
PT0.512S
RenderingHints
DisplayType
TimeSeries
AxisLabel
Start Time MJD
ValueFormat
F30.12
FillValue
-1.0e+31
Support
Parameter #3
Name
Spacecraft Attitude, Polar Pointing Vector, ECI Cartesian Coordinates
Set
Time series defined by using: EPOCH
ParameterKey
FPOLARPOINTECI
Description
Spacecraft Attitude, Polar Pointing Vector, Earth Centered Inertial, ECI, Cartesian Coordinates
Cadence
PT0.512S
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
RenderingHints
DisplayType
TimeSeries
AxisLabel
Polar ECI XYZ
ValueFormat
F16.12
Structure
Size
3
Element
Name
FPOLARPOINTECI X
Index
1
RenderingHints
Element
Name
FPOLARPOINTECI Y
Index
2
RenderingHints
Element
Name
FPOLARPOINTECI Z
Index
3
RenderingHints
ValidMin
-1.0
ValidMax
1.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.PolarAngle
Qualifier
Vector
SupportQuantity
Velocity
Parameter #4
Name
Spacecraft Attitude, Azimuthal Pointing Vector, ECI Cartesian Coordinates
Set
Time series defined by using: EPOCH
ParameterKey
FAZIMUTHALPOINTECI
Description
Spacecraft Attitude, Azimuthal Pointing Vector, Earth Centered Inertial, ECI, Cartesian Coordinates
Cadence
PT0.512S
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
RenderingHints
DisplayType
TimeSeries
AxisLabel
Azimuthal ECI XYZ
ValueFormat
F16.12
Structure
Size
3
Element
Name
FAZIMUTHALPOINTECI X
Index
1
RenderingHints
Element
Name
FAZIMUTHALPOINTECI Y
Index
2
RenderingHints
Element
Name
FAZIMUTHALPOINTECI Z
Index
3
RenderingHints
ValidMin
-1.0
ValidMax
1.0
FillValue
-1.0e+31
Support
Qualifier
DirectionAngle.AzimuthAngle
Qualifier
Vector
SupportQuantity
Velocity
Parameter #5
Name
TWINS Data File ID
Set
Time series defined by using: EPOCH
ParameterKey
NDATAFILEID
Description
TWINS Data File ID as used in TWINS database storage system
Cadence
PT0.512S
RenderingHints
DisplayType
TimeSeries
AxisLabel
DataFile ID
ValueFormat
F7
ValidMin
0
ValidMax
2147483647
FillValue
-2012696540
Support