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Data Access

AMPTE-IRM Magnetic Field

ResourceID
spase://VSPO/NumericalData/AMPTE-IRM/MAG/PT4.4S

Description

AMPTE-IRM spin-averaged magnetic field at ~4.4 second resolution.

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Details

Version:2.2.9

NumericalData

ResourceID
spase://VSPO/NumericalData/AMPTE-IRM/MAG/PT4.4S
ResourceHeader
ResourceName
AMPTE-IRM Magnetic Field
ReleaseDate
2018-04-18 16:35:54Z
Description

AMPTE-IRM spin-averaged magnetic field at ~4.4 second resolution.

Acknowledgement
User will acknowledge the AMPTE/IRM magnetometer team in any publication resulting from the use of these data.
Contacts
RolePerson
1.PrincipalInvestigatorspase://SMWG/Person/Hermann.Luehr
2.DataProducerspase://SMWG/Person/Lynn.M.Kistler
InformationURL
Name
AMPTE/IRM page at University of New Hampshire
URL
http://www-ssg.sr.unh.edu/index.html?tof/Missions/Ampte-irm
Description

Information on the AMPTE/IRM data

PriorIDs
spase://VMO/NumericalData/AMPTE_IRM/MAG/PT4.4S
spase://VMO/NumericalData/AMPTE-IRM/MAG/PT4.4S
AccessInformation
RepositoryID
spase://SMWG/Repository/NASA/GSFC/VHO-VMO
Availability
Online
AccessRights
Open
AccessURL
Name
AMPTE/IRM Data
URL
https://vmo.nasa.gov/mission/ampte_irm/
Description

A web-accessible directory hosting AMPTE/IRM spin-averaged magnetic field and plasma data.

Format
Text
Encoding
ASCII
InstrumentIDs
spase://SMWG/Instrument/AMPTE-IRM/MAG
MeasurementType
Ephemeris
MeasurementType
MagneticField
TemporalDescription
TimeSpan
StartDate
1984-08-21 00:48:41Z
StopDate
1986-08-11 21:45:07Z
Cadence
PT4.4S
ObservedRegion
Earth.Magnetosheath
ObservedRegion
Earth.Magnetosphere
ObservedRegion
Earth.Magnetosphere.Magnetotail
ObservedRegion
Heliosphere.NearEarth
Caveats
The spin period changed from ~4.3s to ~4.7s during the mission. IRM time stamps are UT at time of ground receipt. Thus for time-critical science, the IRM times need to be corrected by subtracting the light travel time from the spacecraft to the ground-station (at Weilheim in Germany apart special events requiring NASA DSN). For the transmission frequencies used, the vacuum light speed is appropriate. At apogee, this correction is more than a third of a second. There are no other known time delays.
Keywords
Magnetic field
Parameter #1
Name
Time
ParameterKey
Column 1
Description

The center of the accumulation time interval for the data point, in DA/MO/YR HR:MI:SS format.

Support
SupportQuantity
Temporal
Parameter #2
Name
DT
ParameterKey
Column 2
Description

The accumulation time for the measurement, normally one spin

Units
s
Support
SupportQuantity
Temporal
Parameter #3
Name
Xgse
ParameterKey
Column 3
Description

The X component of spacecraft location in GSE, in Re (Re=6378 km)

Units
Re
UnitsConversion
6.378e6>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
1
Element
Name
Xgse
Qualifier
Component.I
Index
1
Support
SupportQuantity
Positional
Parameter #4
Name
Ygse
ParameterKey
Column 4
Description

The Y component of spacecraft location in GSE, in Re (Re=6378 km)

Units
Re
UnitsConversion
6.378e6>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
1
Element
Name
Ygse
Qualifier
Component.J
Index
1
Support
SupportQuantity
Positional
Parameter #5
Name
Zgse
ParameterKey
Column 5
Description

The Z component of spacecraft location in GSE, in Re (Re=6378 km)

Units
Re
UnitsConversion
6.378e6>m
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Structure
Size
1
Element
Name
Zgse
Qualifier
Component.K
Index
1
Support
SupportQuantity
Positional
Parameter #6
Name
Rgse
ParameterKey
Column 6
Description

Radial distance in SM, in Re (Re=6378 km)

Units
Re
UnitsConversion
6.378e6>m
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SM
Support
Qualifier
Magnitude
SupportQuantity
Positional
Parameter #7
Name
MLAT
ParameterKey
Column 7
Description

Magnetic latitude in SM, in degrees

CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SM
Support
Qualifier
DirectionAngle.ElevationAngle
SupportQuantity
Positional
Parameter #8
Name
MLT
ParameterKey
Column 8
Description

Magnetic Local Time in SM, in hours

Units
hour
UnitsConversion
15>deg
CoordinateSystem
CoordinateRepresentation
Spherical
CoordinateSystemName
SM
Support
Qualifier
DirectionAngle.AzimuthAngle
SupportQuantity
Positional
Parameter #9
Name
Bx
ParameterKey
Column 9
Description

Magnetic field cartesian GSE X component

Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Field
Qualifier
Component.I
FieldQuantity
Magnetic
Parameter #10
Name
By
ParameterKey
Column 10
Description

Magnetic field cartesian GSE Y component

Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Field
Qualifier
Component.J
FieldQuantity
Magnetic
Parameter #11
Name
Bz
ParameterKey
Column 11
Description

Magnetic field cartesian GSE Z component

Units
nT
UnitsConversion
1.0e-9>T
CoordinateSystem
CoordinateRepresentation
Cartesian
CoordinateSystemName
GSE
Field
Qualifier
Component.K
FieldQuantity
Magnetic