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DE 1 1-min Position Data

ResourceID
spase://NASA/NumericalData/DE1/Ephemeris/PT1M

Description

DE 1 satellite position and magnetic field model information.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://NASA/NumericalData/DE1/Ephemeris/PT1M
ResourceHeader
ResourceName
DE 1 1-min Position Data
AlternateName
Dynamics Explorer 1 1-min Position Data
AlternateName
DE-A 1-min Position Data
ReleaseDate
2020-07-07 21:14:31Z
Description

DE 1 satellite position and magnetic field model information.

Acknowledgement
NASA Space Physics Data Facility (SPDF) Satellite Situation Center (SSC).
Contacts
RolePersonStartDateStopDateNote
1.GeneralContactspase://SMWG/Person/Robert.E.McGuire
PriorIDs
spase://VSPO/NumericalData/DE1/Ephemeris/PT1M
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/SPDF
Availability
Online
AccessRights
Open
AccessURL
Name
SSCWeb
URL
https://sscweb.gsfc.nasa.gov/cgi-bin/Locator.cgi
ProductKey
de1
Format
CDF
InstrumentIDs
spase://SMWG/Instrument/DynamicsExplorer1/Ephemeris
MeasurementType
Ephemeris
TemporalDescription
TimeSpan
StartDate
1981-08-03 10:37:59.000Z
StopDate
1991-03-02 08:00:00.000Z
Cadence
PT1M
Parameter #1
Name
Epoch Time
ParameterKey
Epoch
Description

Number of milliseconds since the CDF epoch

Units
ms
UnitsConversion
1e-3>s
ValidMin
01-Jan-1956 00:00:00.000
ValidMax
01-Jan-2083 00:00:00.000
FillValue
-1.0E31
Support
SupportQuantity
Temporal
Parameter #2
Name
GEI position
ParameterKey
XYZ_GEI
Description

Spacecraft position in GEI

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEI
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #3
Name
GEI latitude
ParameterKey
GEI_LAT
Description

Latitude of the spacecraft position in GEI

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEI
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #4
Name
GEI longitude
ParameterKey
GEI_LON
Description

Longitude of the spacecraft position in GEI

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEI
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #5
Name
J2000 position
ParameterKey
XYZ_J2000
Description

Spacecraft position in J2000

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
J2000
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #6
Name
J2000 latitude
ParameterKey
J2000_LAT
Description

Latitude of the spacecraft position in J2000

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
J2000
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #7
Name
J2000 longitude
ParameterKey
J2000_LON
Description

Longitude of the spacecraft position in J2000

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
J2000
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #8
Name
GEO position
ParameterKey
XYZ_GEO
Description

Spacecraft position in GEO

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GEO
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #9
Name
GEO latitude
ParameterKey
GEO_LAT
Description

Latitude of the spacecraft position in GEO

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #10
Name
GEO longitude
ParameterKey
GEO_LON
Description

Longitude of the spacecraft position in GEO

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #11
Name
GEO local time
ParameterKey
GEO_LCT_T
Units
hours
ValidMin
0.0
ValidMax
24.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #12
Name
GM position
ParameterKey
XYZ_GM
Description

Spacecraft position in GM

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
MAG
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #13
Name
GM latitude
ParameterKey
GM_LAT
Description

Latitude of the spacecraft position in GM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #14
Name
GM longitude
ParameterKey
GM_LON
Description

Longitude of the spacecraft position in GM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #15
Name
GM local time
ParameterKey
GM_LCT_T
Units
hours
ValidMin
0.0
ValidMax
24.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #16
Name
GSE position
ParameterKey
XYZ_GSE
Description

Spacecraft position in GSE

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #17
Name
GSE latitude
ParameterKey
GSE_LAT
Description

Latitude of the spacecraft position in GSE

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GSE
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #18
Name
GSE longitude
ParameterKey
GSE_LON
Description

Longitude of the spacecraft position in GSE

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GSE
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #19
Name
GSE local time
ParameterKey
GSE_LCT_T
Units
hours
ValidMin
0.0
ValidMax
24.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #20
Name
GSM position
ParameterKey
XYZ_GSM
Description

Spacecraft position in GSM

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSM
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #21
Name
GSM latitude
ParameterKey
GSM_LAT
Description

Latitude of the spacecraft position in GSM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GSM
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #22
Name
GSM longitude
ParameterKey
GSM_LON
Description

Longitude of the spacecraft position in GSM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GSM
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #23
Name
SM position
ParameterKey
XYZ_SM
Description

Spacecraft position in SM

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
SM
Structure
Size
3
Element
Name
x
Qualifier
Component.I
Index
1
FillValue
-1.0E31
Element
Name
y
Qualifier
Component.J
Index
2
FillValue
-1.0E31
Element
Name
z
Qualifier
Component.K
Index
3
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #24
Name
SM latitude
ParameterKey
SM_LAT
Description

Latitude of the spacecraft position in SM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SM
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #25
Name
SM longitude
ParameterKey
SM_LON
Description

Longitude of the spacecraft position in SM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SM
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #26
Name
SM local time
ParameterKey
SM_LCT_T
Units
hours
ValidMin
0.0
ValidMax
24.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #27
Name
Space Region
ParameterKey
SPACECRAFT_REGIONS
Description

Region in space where the spacecraft is located. Values are: 1 = INTERPLANETARY_MEDIUM, 2 = DAYSIDE_MAGNETOSHEATH, 3 = NIGHTSIDE_MAGNETOSHEATH, 4 = DAYSIDE_MAGNETOSPHERE, 5 = NIGHTSIDE_MAGNETOSPHERE, 6 = PLASMA_SHEET, 7 = TAIL_LOBE, 8 = LOW_LATITUDE_BOUNDARY_LAYER, 9 = HIGH_LATITUDE_BOUNDARY_LAYER, 10 = DAYSIDE_PLASMASPHERE, 11 = NIGHTSIDE_PLASMASPHERE.

ValidMin
1
ValidMax
11
FillValue
-2147483648
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #28
Name
Radial Traced Footpoint Region
ParameterKey
RADIAL_TRACED_REGIONS
Description

Region on the Earth's surface where a straight line would intersect when connecting the spacecraft and the Earth's center. Values are: 0 = NOT_APPLICABLE, 1 = NORTH_CUSP, 2 = SOUTH_CUSP, 3 = NORTH_CLEFT, 4 = SOUTH_CLEFT, 5 = NORTH_AURORAL_OVAL, 6 = SOUTH_AURORAL_OVAL, 7 = NORTH_POLAR_CAP, 8 = SOUTH_POLAR_CAP, 9 = NORTH_MID_LATITUDE, 10 = SOUTH_MID_LATITUDE, 11 = LOW_LATITUDE.

ValidMin
0
ValidMax
11
FillValue
-2147483648
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #29
Name
North B Traced Footpoint Region
ParameterKey
NORTH_BTRACED_REGIONS
Description

Region on the Earth's surface where the magnetic field line that passes through the spacecraft intersects the Earth's surface in the Earth's northern magnetic hemisphere. Values are: 0 = NOT_APPLICABLE, 1 = NORTH_CUSP, 3 = NORTH_CLEFT, 5 = NORTH_AURORAL_OVAL, 7 = NORTH_POLAR_CAP, 9 = NORTH_MID_LATITUDE, 11 = LOW_LATITUDE.

ValidMin
0
ValidMax
11
FillValue
-2147483648
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #30
Name
South B Traced Region
ParameterKey
SOUTH_BTRACED_REGIONS
Description

Region on the Earth's surface where the magnetic field line that passes through the spacecraft intersects the Earth's surface in the Earth's southern magnetic hemisphere. Values are: 0 = NOT_APPLICABLE, 2 = SOUTH_CUSP, 4 = SOUTH_CLEFT, 6 = SOUTH_AURORAL_OVAL, 8 = SOUTH_POLAR_CAP, 10 = SOUTH_MID_LATITUDE, 11 = LOW_LATITUDE.

ValidMin
0
ValidMax
11
FillValue
-2147483648
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #31
Name
Radial Distance
ParameterKey
RADIUS
Description

Radial distance of the spacecraft

Units
km
UnitsConversion
1e3>m
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Magnitude
SupportQuantity
Positional
Parameter #32
Name
Magnetic Field Strength
ParameterKey
MAG_STRTH
Description

Model predicted magnetic field strength

Units
nT
ValidMin
0.0
FillValue
-1.0E31
Field
FieldQuantity
Magnetic
Parameter #33
Name
Dipole L Value
ParameterKey
L_VALUE
Description

Mcllwain L value at the spacecraft's location

ValidMin
1.5
ValidMax
5.0
FillValue
-1.0E31
Support
SupportQuantity
Positional
Parameter #34
Name
Dipole Invariant Lattitude
ParameterKey
INVAR_LAT
Description

Dipole invariant latitudes at the spacecraft's location

Units
Deg
ValidMin
-90.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #35
Name
Distance to neutral sheet
ParameterKey
DNEUTS
Description

Distance from satellite to neutral sheet

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Positional
Parameter #36
Name
Distance to bow shock
ParameterKey
BOW_SHOCK
Description

Distance from satellite to bow shock

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Positional
Parameter #37
Name
Distance to magnetopause
ParameterKey
MAG_PAUSE
Description

Distance from satellite to magnetopause

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Positional
Parameter #38
Name
Magnetic Field Strength along the GSE X axis
ParameterKey
MAG_X
Description

Model predicted magnetic field strength along the GSE X axis

Units
nT
ValidMin
0.0
FillValue
-1.0E31
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #39
Name
Magnetic Field Strength along the GSE Y axis
ParameterKey
MAG_Y
Description

Model predicted magnetic field strength along the GSE Y axis

Units
nT
ValidMin
0.0
FillValue
-1.0E31
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #40
Name
Magnetic Field Strength along the GSE Z axis
ParameterKey
MAG_Z
Description

Model predicted magnetic field strength along the GSE Z axis

Units
nT
ValidMin
0.0
FillValue
-1.0E31
Field
Qualifier
Component.K
FieldQuantity
Magnetic
Parameter #41
Name
North Hemisphere B Trace GEO latitude
ParameterKey
NorthBtrace_GEO_LAT
Description

Latitude of the northern magnetic field traced footpoint in GEO

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
0.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #42
Name
North Hemisphere B Trace GEO longitude
ParameterKey
NorthBtrace_GEO_LON
Description

Longitude of the northern magnetic field traced footpoint in GEO

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #43
Name
North Hemisphere B Trace GEO arc length
ParameterKey
NorthBtrace_GEO_ARCLEN
Description

Length of the magnetic field traced arc from the spacecraft to the northern footpoint in GEO

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #44
Name
South Hemisphere B Trace GEO latitude
ParameterKey
SouthBtrace_GEO_LAT
Description

Latitude of the southern magnetic field traced footpoint in GEO

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
-90.0
ValidMax
0.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #45
Name
South Hemisphere B Trace GEO longitude
ParameterKey
SouthBtrace_GEO_LON
Description

Longitude of the southern magnetic field traced footpoint in GEO

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
GEO
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #46
Name
South Hemisphere B Trace GEO arc length
ParameterKey
SouthBtrace_GEO_ARCLEN
Description

Length of the magnetic field traced arc from the spacecraft to the southern footpoint in GEO

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #47
Name
North Hemisphere B Trace GM latitude
ParameterKey
NorthBtrace_GM_LAT
Description

Latitude of the northern magnetic field traced footpoint in GM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
ValidMin
0.0
ValidMax
90.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #48
Name
North Hemisphere B Trace GM longitude
ParameterKey
NorthBtrace_GM_LON
Description

Longitude of the northern magnetic field traced footpoint in GM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #49
Name
North Hemisphere B Trace GM arc length
ParameterKey
NorthBtrace_GM_ARCLEN
Description

Length of the magnetic field traced arc from the spacecraft to the northern footpoint in GM

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Other
Parameter #50
Name
South Hemisphere B Trace GM latitude
ParameterKey
SouthBtrace_GM_LAT
Description

Latitude of the southern magnetic field traced footpoint in GM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
ValidMin
-90.0
ValidMax
0.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #51
Name
South Hemisphere B Trace GM longitude
ParameterKey
SouthBtrace_GM_LON
Description

Longitude of the southern magnetic field traced footpoint in GM

Units
Deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
MAG
ValidMin
-180.0
ValidMax
360.0
FillValue
-1.0E31
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #52
Name
South Hemisphere B Trace GM arc length
ParameterKey
SouthBtrace_GM_ARCLEN
Description

Length of the magnetic field traced arc from the spacecraft to the southern footpoint in GM

Units
Km
ValidMin
0.0
FillValue
-1.0E31
Support
Qualifier
Scalar
SupportQuantity
Other